z*****y
发帖数: 7 | 1 Hi,
Does anyone know if ketone containing monomers are compatible with radical
polymerization? Some people told me ketone is not stable when radical
polymerizatios are performed.
Appreciate any of your ideas. |
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l****u
发帖数: 3 | 3 Dear Dr. XXX,
I saw your resume on Monster and think you are a good match to the position
I am seeking to fill of Polymerization Applications Scientist. The job is
in Decatur , Alabama , with a progressive chemical company. I am not
certain of your present circumstances, but I have included a brief job
description for you review:
The Polymerization and Applications Scientist is the R&D expert in product
and process development responsible for bringing new technologies from
concept stage throug... 阅读全帖 |
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d********y
发帖数: 176 | 4 http://onlinelibrary.wiley.com/doi/10.1002/masy.19900320118/pdf
On the nature of active species in cationic ring-opening polymerization of
cyclodimethylsiloxanes
Authors
Pierre Sigwalt,
Vivian Stannett
First published: February 1990Full publication history
DOI: 10.1002/masy.19900320118View/save citation
Cited by: 5 articlesCitation tools
Abstract
Contrarily to cationic ring-opening polymerization of cyclic ethers and of
some other cyclic monomers, for which direct identification of the various
t... 阅读全帖 |
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c****n
发帖数: 134 | 7 By definition (Szwarc), a living polymerization involves only initiation and
propagation. there is no chain breaking reactions such as termination and
chain transfer. (Perhaps only chain polymerization is considered in the realm
of living polymerization. An important criterion of a living polymerization is
that the number of chains doesn't change with conversion.)
The living nature of a polymerization doesn't guarantee the narrow molecular
weight distribution. P. J. Flory reasoned that when init |
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b**s
发帖数: 589 | 8 'polymer therapeutics'. (Polymer therapeutics are nano-sized
medicines.)，估计大量的公司将从中诞生
Polymer therapeutics are nano-sized medicines. The definition encompasses
polymeric drugs (polymeric molecules that are biologically active in their own
right); polymer–drug conjugates; polymer–protein conjugates; polymeric
micelles to which drug is covalently bound; and polymeric non-viral vectors
for gene delivery.
1。Biologically active polymers and polymeric sequestrants are entering
routine clini |
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m**p
发帖数: 2471 | 9 http://books.google.com/books/about/Surface_Tension_of_Pulmonar
Surface Tension of Pulmonary Surfactant Systems
Pulmonary surfactant facilitates respiration by reducing the surface tension
in the alveoli. To study the surface activity of pulmonary surfactant films
under physiologically relevant conditions, several experimental methods
were developed to measure surfactant film interfacial tension with
Axisymmetric Drop Shape Analysis (ADSA). Using a pendant drop method, the
film formation of a th... 阅读全帖 |
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q***l
发帖数: 177 | 10 National Academy of Engineering Elects 66 Members and 10 Foreign Associates
WASHINGTON — The National Academy of Engineering (NAE) has elected 66 new
members and 10 foreign associates, announced NAE President Charles M. Vest
today. This brings the total U.S. membership to 2,254 and the number of
foreign associates to 206.
Election to the National Academy of Engineering is among the highest
professional distinctions accorded to an engineer. Academy membership
honors those who have made outstand... 阅读全帖 |
|
y***o
发帖数: 416 | 11 1. Comparative Theoretical Study on Homopolymerization of α-Olefins by Bis(
cyclopentadienyl) Zirconocene and Hafnocene: Elemental Propagation and
Termination Reactions between Monomers and Metals
Organometallics, 2010, 29 (7), pp 1541–1550
DOI: 10.1021/om900843h
http://pubs.acs.org/doi/pdf/10.1021/om900843h
2. Influence of the Ligand Structure of Hafnocene Polymerization Catalysts:
A Theoretical Study on Ethene Insertion and Chain Propagation
Organometallics, 2008, 27 (14), pp 3390–3398
DOI: 10... 阅读全帖 |
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g******6
发帖数: 782 | 12 http://www.nae.edu/56154.aspx
National Academy of Engineering Elects 66 Members and 10 Foreign Associates
WASHINGTON — The National Academy of Engineering (NAE) has elected 66 new
members and 10 foreign associates, announced NAE President Charles M. Vest
today. This brings the total U.S. membership to 2,254 and the number of
foreign associates to 206.
Election to the National Academy of Engineering is among the highest
professional distinctions accorded to an engineer. Academy membership
honor... 阅读全帖 |
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c*******n
发帖数: 1648 | 13 I don't think the free radical can make it, degradative chain transfer could
happen. However, the cationic polymerization probably do. If you have time,
check out some textbook on polymerization, such as Odian's. Take a look at the
table for monomer and corresponding polymerization method. Generally vinyl
ether can not be polymerized by free radical.
of |
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w********h
发帖数: 12367 | 14 1. Title: CONTROLLED LIVING RADICAL POLYMERIZATION - ATOM-TRANSFER RADICAL
POLYMERIZATION IN THE PRESENCE OF TRANSITION-METAL COMPLEXES
Author(s): WANG JS, MATYJASZEWSKI K
Source: JOURNAL OF THE AMERICAN CHEMICAL SOCIETY Volume: 117 Issue: 20
Pages: 5614-5615 Published: MAY 24 1995
Times Cited: 2,083
2. Title: CONTROLLED LIVING RADICAL POLYMERIZATION - HALOGEN ATOM-TRANSFER
RADICAL POLYMERIZATION PROMOTED BY A CU(I)CU(II) REDOX PROCESS
Author(s): WANG JS, MATYJASZEWSKI K
Source: MACRO |
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r******0
发帖数: 2753 | 15 其实你已经说了你不是学高分子化学的，或许我就不该对你这么挑剔。但我觉得还是有
必要提醒你一下，你做的这个严格来说不能叫emulsion polymerization。不管你别的
东西怎么变，styrene + AIBN 这个组合怎么做都不会是emulsion polymerization，只
会是suspension polymerization。不信的话，你去看看emulsion polymerization的定
义是怎样的。 |
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发帖数: 1 | 16 本人多年从事polymer chemistry, organometallic, nanomaterials的研究工作，最近
在展审稿数量申绿，求推荐。以下是我的研究领域：
• Strong proficiency in design multi-step organic/organometallic/
inorganic syntheses under the various conditions, design of synthetic
strategy based on goal compound, cultivation of single crystals, synthesis
and characterization of organometallic compounds (Pd, Al, Sc, Y, Ti, Zr, Hf,
Fe, Co, Ni, Cr, Ir, Ru), macromolecules and nanomaterials:
1. Cross-Coupling polymerization: design, synthesis an... 阅读全帖 |
|
发帖数: 1 | 17 本人多年从事polymer chemistry, organometallic, nanomaterials的研究工作，最近
在展审稿数量申绿，求推荐。以下是我的研究领域：
• Strong proficiency in design multi-step organic/organometallic/
inorganic syntheses under the various conditions, design of synthetic
strategy based on goal compound, cultivation of single crystals, synthesis
and characterization of organometallic compounds (Pd, Al, Sc, Y, Ti, Zr, Hf,
Fe, Co, Ni, Cr, Ir, Ru), macromolecules and nanomaterials:
1. Cross-Coupling polymerization: design, synthesis an... 阅读全帖 |
|
l***d
发帖数: 1798 | 18 FOR IMMEDIATE RELEASE
National Academy of Engineering Elects 66 Members and 10 Foreign Associates
WASHINGTON — The National Academy of Engineering (NAE) has elected 66 new m
embers and 10 foreign associates, announced NAE President Charles M. Vest to
day. This brings the total U.S. membership to 2,254 and the number of forei
gn associates to 206.
Election to the National Academy of Engineering is among the highest profess
ional distinctions accorded to an engineer. Academy membership honors th... 阅读全帖 |
|
t********o
发帖数: 96 | 19 I have an excellent career opportunity for Senior Research Scientist in
Houston with a very prestigious company. If the following job description
fits and you are interested, please send you resume as a word document. You
never have to worry about confidentiality; we will not submit your resume
without your permission. After all, you are interviewing the company as
much as they are interviewing you. I look forward to sharing this most
exciting opportunity with you!
Thank you for your time an... 阅读全帖 |
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t********o
发帖数: 96 | 20 I have an excellent career opportunity for Senior Research Scientist in
Houston with a very prestigious company. If the following job description
fits and you are interested, please send you resume as a word document.
You
never have to worry about confidentiality; we will not submit your resume
without your permission. After all, you are interviewing the company as
much as they are interviewing you. I look forward to sharing this most
exciting opportunity with you!
Thank you for your time an... 阅读全帖 |
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j**********i
发帖数: 187 | 21 1. Polymerization kinetics of polyacrylamide gels. III. Effect of catalysts
ELECTROPHORESIS
Volume 2, Issue 5-6, February 1981, Pages: 291–295, Pier Giorgio Righetti,
Cecilia Gelfi and Adriana Bianchi Bosisio
2. Polymerization kinetics of polyacrylamide gels I. Effect of different
cross-linkers
ELECTROPHORESIS
Volume 2, Issue 4, February 1981, Pages: 213–219, Cecilia Gelfi and Pier
Giorgio Righetti
3.Polymerization kinetics of polyacrylamide gels II. Effect of temperature
ELECTROPHORESIS
Volume ... 阅读全帖 |
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S***k
发帖数: 158 | 22 来组里4年了，换了4个课题。
第一个课题，老板不是很懂，以为新能源好申请funding，让我一个刚进组里的、只有
本科学历的人自己搭平台。结果可想而知。
第二个课题，老板算是领域内小牛，但那都是10年前的事情了。结果是还得靠自己找课
题，自己做实验，每天trouble shooting到深夜。一问老板，得到的结果都是“I don'
t know.”或者一些根本不靠谱的指导。做了一年，算是自己每天吭哧吭哧地弄出来些
东西，写了篇文章准备找个小刊物（IF<3）发掉算了，结果老板表示兴趣不大，到现在
都不给我改。你TMD不给我改，能让我直接投出去算了么？大不了被拒了老子直接翻译
成中文找家国内的核心期刊投了拉倒。
第三个课题，垃圾领域，基本无就业机会，但是好刷文章。被老板扔到这个领域，现在
做了几个月，攒了些数据准备写写弄弄找个小刊物投了凑数，毕业拉倒。结果每次去找
老板聊，得到的回答不是“I don't know”，就是长达数小时的胡言乱语。最后听实验
室另一个也做这个领域的仁兄说，老板在这个领域里读的paper还没有他多。。。
第四个课题，跟第三个课题同时进行的，属于高分子材料方面，有关... 阅读全帖 |
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y***o
发帖数: 416 | 23 1. Remarkably Active Non-Metallocene Ethylene Polymerization Catalysts
Organometallics, 1999, 18 (11), pp 2046–2048
DOI: 10.1021/om981026q
http://pubs.acs.org/doi/pdf/10.1021/om981026q
2. Phosphinimide−Phosphinimide Ligands: New Bulky Ligands for
Ethylene Polymerization Catalysts
Organometallics, 2001, 20 (11), pp 2303–2308
DOI: 10.1021/om0101184
http://pubs.acs.org/doi/pdf/10.1021/om0101184
3. An Approach to Catalyst Design: Cyclopentadienyl-Titanium Phosphinimide
Complexes in Ethy... 阅读全帖 |
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B*****n
发帖数: 654 | 24 【 以下文字转载自 Texas 讨论区 】
发信人: Boolean (Soso), 信区: Texas
标 题: 能求个 工作推荐不? polymer chemistry 方向的
发信站: BBS 未名空间站 (Wed Oct 8 18:56:16 2014, 美东)
人在TAMU, 找工作中, 有人能帮帮忙么?
10+ years polymer research scientist/engineer with strong experience in
advanced polymer material synthesis and characterization. Expertise in
polymer coating, extrusion, casting films Rheology analysis of polymeric
systems, polymer additives R&D experience, polymer composites preparation
and nano-material synthesis & characterization. A... 阅读全帖 |
|
q****i
发帖数: 6923 | 25 Poly(phenylenevinylene)s as Sensitizers for Visible Light Induced Cationic
Polymerization
Semih Erdur, Gorkem Yilmaz, Demet Goen Colak, Ioan Cianga, and Yusuf Yagci
Macromolecules, 2014, 47 (21), pp 7296–7302
http://pubs.acs.org/doi/abs/10.1021/ma5019457
A Dithienothiophene Derivative as a Long-Wavelength Photosensitizer for
Onium Salt Photoinitiated Cationic Polymerization
Binnur Aydogan, Ali Senol Gundogan, Turan Ozturk and Yusuf Yagci
Macromolecules, 2008, 41 (10), pp 3468–3471
http://pubs.ac... 阅读全帖 |
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q****i
发帖数: 6923 | 26 (3) Senior Polymer Scientist (Cleveland, OH)
Duties/Responsibilities:
•My exciting new Client is searching for a dynamic individual with
experience in organic and polymer synthesis, and polymer application
development. This Senior Polymer Scientist will be part of an application
development group of scientists and chemists. Responsibilities will include
conducting laboratory synthesis and polymer characterization, interpreting
and reporting results, maintaining instrumentation, documenting... 阅读全帖 |
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c****n
发帖数: 134 | 27 This criterion was listed in Quirk's book "Anionic polymerization",
but personally I don't think it is a good criterion.
Block copolymer may not be formed if you add propylene to living anionic
polystyrene...
block copolymer will be formed only when two monomer are similar in reactivity
in a specific polymerization (such as styrene and butadiene in anionic
polymerization). when the two monomers are quite different in reactivity, the
block copolymer may not be formed or there may be contaminatio |
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w********h
发帖数: 12367 | 28 Living anionic polymerization was found in 1956 by Szwac.
Ziegler-Natta found catalysts around mid 50 too.
(1)The advantage of ATRP is very clear.
it conbines the advantages of free radical polymerization and living (or
controllable) polymerization together.
(2)People benefit from ATRP because it offers an easy way to synthesize
polymers with designed structure.
(3)Industrialization is very important, but it is not impossible. The key part
is to solve the catalyst problem.
and |
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s****e
发帖数: 2934 | 29 Polymerization is very complicated, you cannot simplize it like this way. To
choose the solvent for the polymerization, you need to consider many factors.
If your target is only to synthesize a new polymer, you dont need to think too
much about it only if you get polymer, then you can publish an ok paper. If
you want to find the best condition for the polymerization to publish good
paper,you need to know well about the properties of the initiator (catalyst?)
,monomer and polymer. so that you ca |
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a*****c
发帖数: 3525 | 30 【 以下文字转载自 Chemistry 讨论区 】
发信人: agostic (若即若离), 信区: Chemistry
标 题: Polymers With Safe Amounts Of Copper zt
发信站: BBS 未名空间站 (Wed Nov 1 00:40:56 2006)
Polymers With Safe Amounts Of Copper
New polymerization techniques that reduce catalyst contamination of products
could find broad industrial use
Stu Borman
Thanks to reduced requirements for metal catalysts, two new polymerization
techniques—one that modifies and improves an important polymerization
process and another that converts that process in |
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s****e
发帖数: 2934 | 31 ☆─────────────────────────────────────☆
wcy3029 (燕子) 于 (Thu Jul 27 20:51:45 2006) 提到:
I am doing DX delivery by hydrogels.I just begin. Most papers said loading
drug before polymerization and releasing it after polymerization. But I am so
confused how to purify the polymer after polymerization. There must be some
unreacted monomers residues in the polymer. During purifacation, the drug will
be released. Now I want to load drug after purification. I didn't get the
results yet.
☆───────────── |
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a*i
发帖数: 1652 | 32 I think I discovered an interesting modification method which applies to
anionic polymerization. I want to patent it, but I have no idea about
anionic polymerization. If I don't actually work on it, I can't get a patent
. If I tell an anionic polymerization expert, he can easily work it out and
get the patent. What is the best way to maximize my interest while getting
the technology disclosed? |
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d**a
发帖数: 3715 | 33 管能度为2的单体在step polymerization中生成线性聚合物，这没有问题。但是前面
ross2000同
学不是说在radical polymerization过程中是参照不同的体系？
前面ross2000同学不是说在radical polymerization 中，参照的是不同的 |
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m*****s
发帖数: 2227 | 34 http://en.wikipedia.org/wiki/ATRP_%28chemistry%29
ATRP or Atom Transfer Radical Polymerization is an example of a living
polymerization or a controlled/living radical polymerization (CRP). Like its
counter part, ATRA or Atom Transfer Radical Addition, it is a means of
forming carbon-carbon bond through transition metal catalyst. As the name
implies, the atom transfer step is the key step in the reaction responsible
for uniform polymer chain growth. ATRP (or transition metal-mediated living
radic |
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r******0
发帖数: 2753 | 35 What you talked about is not traditional emulsion polymerization. yes, mini-
emulsion polymerization or seeded emulsion polymerization can use oil
soluble initiator. Those are very different mechanisms. |
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a*i
发帖数: 1652 | 36 来自主题: Macromolecules版 - eATRP New method allows for more precise control over ATRP
http://www.rdmag.com/News/2011/04/Manufacturing-Materials-New-M
Scientists led by Carnegie Mellon Univ. chemist Krzysztof Matyjaszewski are
using electricity from a battery to drive atom transfer radical
polymerization (ATRP), a widely used method of creating industrial plastics.
The environmentally friendly approach, reported in Science, represents a
breakthrough in the level of control scientists can achieve over the ATRP
process, which will... 阅读全帖 |
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h****z
发帖数: 1996 | 37 严格定义活性聚合的话，只有活性阴离子聚合，阴离子是永生的 不需要别的东西
活性自由基的话，“活性”要加引号，其实只是可控而已，可以通过可逆终止（ATRP等
）也可以通过简并转移（RAFT等）
普通的自由基聚合是很快被灭掉了
快速引发我觉得只是为了降低pdi吧，阴离子的话不会因为引发慢了就不是活性的了
“活性”自由基聚合也不见得都要求快速引发，具体我不是太了解
以上只是讲了chain growth polymerization两种情况，没包括 ring-opending
polymerization
往大了讲还有step growth polymerization，所以你说的普通聚合并没有定义清楚。。 |
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B*****n
发帖数: 654 | 38 【 以下文字转载自 Texas 讨论区 】
发信人: Boolean (Soso), 信区: Texas
标 题: 能求个 工作推荐不? polymer chemistry 方向的
发信站: BBS 未名空间站 (Wed Oct 8 18:56:16 2014, 美东)
人在TAMU, 找工作中, 有人能帮帮忙么?
10+ years polymer research scientist/engineer with strong experience in
advanced polymer material synthesis and characterization. Expertise in
polymer coating, extrusion, casting films Rheology analysis of polymeric
systems, polymer additives R&D experience, polymer composites preparation
and nano-material synthesis & characterization. A... 阅读全帖 |
|
a*****a
发帖数: 210 | 39 We are looking for an experienced and highly motivated scientist to join our
Adhesives Center of Excellence. The Adhesives Center of Excellence (ACE)
was created to address emerging market needs, exploit new technology and
close competitive gaps.
The purpose of this position is to develop and commercialize cutting-edge
adhesives technology that advances the strategic interests of one or more
Avery Dennison businesses. You will engage with technical and marketing
people in our various businesses ... 阅读全帖 |
|
a*****a
发帖数: 210 | 40 Looking for an experienced and highly motivated scientist to join our
Adhesives Center of Excellence. The Adhesives Center of Excellence (ACE) was
created to address emerging market needs, exploit new technology and close
competitive gaps.
This position will develop and commercialize high-performance adhesives
technology for structural applications. You will stay current in relevant
technical fields as well as engage with technical and marketing people in
our various businesses to understand eme... 阅读全帖 |
|
a*****a
发帖数: 210 | 41 Looking for an experienced and highly motivated scientist to join our
Adhesives Center of Excellence. The Adhesives Center of Excellence (ACE) was
created to address emerging market needs, exploit new technology and close
competitive gaps.
This position will develop and commercialize high-performance adhesives
technology for structural applications. You will stay current in relevant
technical fields as well as engage with technical and marketing people in
our various businesses to understand eme... 阅读全帖 |
|
a***o
发帖数: 104 | 42 1. Journal: Materials Science and Engineering C (IF:3.088)
Keywords: abalone water-soluble matrix; self-healing; hydroxyapatite;
remineralization; enamel
2. Journal: Materials Science and Engineering C (IF:3.088)
Keywords: Calcium phosphate(s) Bioactive glass Composite Mechanical
properties Cell proliferation;
3. Journal: Materials Science and Engineering C (IF:3.088)
Keywords: dental composite, coupling agents, silane, surface treatment,
polymeric coupling agents, hydrolytic stability, uniform ... 阅读全帖 |
|
发帖数: 1 | 43 Numerical analysis and modeling with applications in fluid and solid
mechanics, physics (of polymeric materials), engineering (mechanical and
mining), and the reliability of electronic devices.
相关领域都可以，希望最近有要出paper的版上朋友帮助。本人在准备申请EB1B，实在
是citation离律师建议的数量还差一些，就因为这个，已经在申请的路上犹豫了一年了
，如果最近几个月能在多出一些来就有把握file case.之前在版上得到很多有用信息，
希望这次能有好心朋友帮助，以后我也定当尽力帮助版上其它朋友。
关键词：computational fluid and solid dynamics, fluid-solid interactions,
polymeric materials, numerical and analytical models, material reliability
... 阅读全帖 |
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B*****n
发帖数: 654 | 44 国内有机合成PhD,美国做博后多年,纳米材料,高分子材料,都有涉及. 发表文章20余篇,
能独立科研. 求工作推荐.
10+ years research scientist/engineer with strong knowledge in polymer
chemistry and organic chemistry. Expertise in synthetic organic chemistry,
polymer work formulation, material science, surface modification and coating
. Extensive experience of scientific presentations at international
conferences. A result oriented team player & independent worker, with skills
summarized as:
Synthesis Skills: Polymer formulation; Polymer hybrid mate... 阅读全帖 |
|
w********h
发帖数: 12367 | 45 其实，atrp就是马组和日本组独立同时发现的。
后来的raft不比atrp差阿。怎么能说它是非主流呢。。。
看看这三篇文章，95年以来引用次数最多的三篇大分子。
第一篇和第三篇是atrp，第二篇就是raft。
当然，王锦山先前在JACS上已经发了片引用超过2000次的。
1. Title: POLYMERIZATION OF METHYL-METHACRYLATE WITH THE CARBON-
TETRACHLORIDE DICHLOROTRIS(TRIPHENYLPHOSPHINE)RUTHENIUM(II) METHYLALUMINUM
BIS(2,6-DI-TERT-BUTYLPHENOXIDE) INITIATING SYSTEM - POSSIBILITY OF LIVING
RADICAL POLYMERIZATION
Author(s): KATO M, KAMIGAITO M, SAWAMOTO M, et al.
Source: MACROMOLECULES Volume: 28 Issue: 5 Pages: 1721-1723
Publ |
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g***2
发帖数: 403 | 46 asymmetric (rockfish)校友:
作为华东化工学院的校友(我是以这个名字招进去的), 特别是高分子系的系友, 多次听
过我们高分子八十年代的辉煌, 98年还在国内时, 就看过王的工作, 但是能达到今天这
个高度 还是从未想过的,毕竟也是读了这么年的书, 没读好是另说, 但绝对是和O等人
不一样,
关于XIA证明的问题, 我就有点SB, 但绝对是和你想的不一样
关于王锦山的工作, 真是强大; 第一次领略高手的对决和原创的厉害:
限ACS 就有16篇, 和ATRP相关的有四个:
1. Controlled/"living" radical polymerization. atom transfer radical
polymerization in the presence of transition-metal complexes
Jin-Shan Wang, Krzysztof Matyjaszewski
J. Am. Chem. Soc., 1995, 117 (20), pp 5614–5615
Publication Date: May 1995 (Article |
|
c******g
发帖数: 49 | 47 Conventional endocytosis is clathrin dependent.Macropinocytosis needs actin
polymerization. You can differentiate these pathways by combinging knockdown
clathrin/caveolae and actin polymerization inhibitors. |
|
B***v
发帖数: 113 | 48 1. clathrin knockdown ---> clathrin dependent endocytosis
2. caveolin knockdown ---> Caveolae-dependent Endocytosis
3. actin polymerization inhibition ---> macropinocytosis
是这个逻辑吧？
actin polymerization inhibition不会影响1和2吗？
actin
knockdown |
|
k***i
发帖数: 662 | 49 August 6, 2007
Volume 85, Number 32
p. 9
Materials Chemistry
Tailor-Made Nanostructures
New methods offer precise control of polymeric micelles
Bethany Halford
CONTROLLING THE FORMATION of complex polymeric nanostructures is no easy task. As the polymer molecules self-assemble, they tend to form particles in an unruly mess of different shapes and sizes. Two new advances offer scientists the ability to tailor these properties, thereby offering nanostructure design strategies that could be |
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S*****n
发帖数: 6055 | 50 Would you be generous enough to provide the data at all your concentrations?
It looks to me that the TG results are reliable, although seems that you did
not do the background subtraction. Also, how much samples do you use each
time?
I have no idea about this Rhodamine B. Do they polymerize in the solution?
There is the possibility that some molecules will polymerize at higher
concentrations, and then the polymer is larger than the pore of SBA-15...
Incomplete calcination may also be a reason, b |
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