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b*****r
发帖数: 29 | 2 代朋友发帖
1. Research Assistantship (RA) for a PhD Student in Mechanical Engineering
An NSF-funded research assistant position is available for a new PhD student
in Mechanical Engineering at the State University of New York (SUNY) at
Binghamton. The research is focused on materials printing using a hybrid
inkjet-electrospray technique. The goal is to print highly-ordered
monolayers of functional nanoparticle inks at high throughput. The student’
s research will be experimental; however, close collab... 阅读全帖 |
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q****i
发帖数: 6923 | 3 Recent Developments in the Synthesis and Structure of Organosilanols
Vadapalli Chandrasekhar Ramamoorthy Boomishankar Selvarajan Nagendran
Chem. Rev., 2004, 104 (12), pp 5847–5910
Publication Date (Web): October 13, 2004 (Article)
http://pubs.acs.org/doi/abs/10.1021/cr0306135
Regiospecific Radical Polymerization of a Tetrasubstituted Ethylene Monomer
with Molecular Oxygen for the Synthesis of a New Degradable Polymer
Akikazu Matsumoto Shuji Taketani
J. Am. Chem. Soc., 2006, 128 (14), pp 4566–456... 阅读全帖 |
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发帖数: 1 | 4 诚求审稿机会，
本人在日本取得硕博学位并有一年半博后经历，目前在美国继续博后工作，已有多次审稿
经验，最近在准备申请美国的绿卡，想继续积攒文章审稿数目，特诚求审稿机会。
主要研究方向有：
Biologically inspired materials;
Polymer biomaterials;
Surface modification;
Living radical polymerization (ATRP/RAFT);
Polymer nanoparticles and hydrogels;
Polymer therapeutics/Gene (RNA/protein) delivery systems;
Cell and material interactions;
Biosensor/biofuel cell;
Nanomedicine / Cancer therapy；
Bacterial, mammal cells and stem cells；
Laser scanning confocal microscopy；
Single cell analysis；
PDMS-b... 阅读全帖 |
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d********y
发帖数: 176 | 5 http://onlinelibrary.wiley.com/doi/10.1002/masy.19910420119/pdf
Article
Inhibiting or cocatalytic effect of water and other additives on cationic
polymerization of cyclodimethylsiloxanes
Authors
P. Sigwalt,
C. Gobin,
P. Nicol,
M. Moreau,
M. Masure
First published: March 1991Full publication history
DOI: 10.1002/masy.19910420119View/save citation
Cited by: 14 articlesCitation tools
Funding Information
Abstract
Cyclodimethylsiloxanes such as hexamethylcyclotrisiloxane (D3) and
octamethyl-cyclotetr... 阅读全帖 |
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w******e
发帖数: 953 | 6 Polymer Chemistry
Volume 8, Issue 5, 7 February 2017, Pages 807-823
Advances in polymeric materials for dental applications |
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w******d
发帖数: 151 | 7 A recent startup from MIT, operating in 3D printing space. Want to add an
experienced material scientist into the team. Experience with photopolymers
preferred, experience with formulation of coatings, inks, adhesives,
elastomers a plus also. Contact me if you are interested and I can share
more information.
Thanks! |
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G***O
发帖数: 839 | 8 我有兴趣，但不知道背景够不够。能够多点详细介绍吗。[email protected] |
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l*****g
发帖数: 556 | 9 请问在哪里？
：
：A recent startup from MIT, operating in 3D printing space. Want to add an |
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m*****t
发帖数: 3477 | 12 【 以下文字转载自 JobHunting 讨论区 】
发信人: dxupa (VA+fisherman), 信区: JobHunting
标 题: Intel AZ position opening
发信站: BBS 未名空间站 (Wed Oct 27 02:01:36 2010, 美东)
Please reply to mailbox for further inquiry/Referral.
Please Note job opening is for PHD RCG (18 month prior or post graduation
date) only. Candidates with chem, polymer, materials science background are
encouraged
to apply.
Description
Job Description: Packaging Engineers provide package development and
sustaining support for integrated circuit or se... 阅读全帖 |
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p*********e
发帖数: 42 | 13 【 以下文字转载自 Macromolecules 讨论区,原文如下 】
发信人: persistence (Young), 信区: Macromolecules
标 题: Help: look for a soft electrode
发信站: Unknown Space - 未名空间 (Wed May 4 13:28:21 2005) WWW-POST
gold is too rigid for some applications. we are looking for a SOFT SOLID
electrode.
Currently, conducting polymer (PANI, polypyrrole, PEDOT) are used, but in situ
polymerization must be used to uniformly deposit it to the surface of our own
materials.
Conductive carbon grease is good, but it is too sticky.
Is there an |
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G***6
发帖数: 1323 | 14 # Carbon nanotubes
# Macromolecules at the surface and interface
# Nanofiber/nanoparticle filled polymers
# Nanocomposites
# Optoelectronic polymers
# Polymeric biomaterials
# Polymer photonic and biomedical devices (sensors, actuators, light-
emitting diodes)
在以上这些领域做器件的 目前的工作前景如何呢？ 这个领域的硕士和博士找工作有
什么区别啊？ 请赐教！不吝感谢！ |
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d***a
发帖数: 73 | 15 See job description below. Recent college graduate only.
if interested, 请站内联系。
Sr. Materials Engineer
Description
Come join a creative team of Senior Materials Engineers dedicated to the
development of microelectronic packages. Our engineers provide project
management, package design/development, and sustaining support for
integrated circuit or semiconductor assemblies. Our engineers work in cross-
functional teams to define overall package performance and specification and
realize technology ce... 阅读全帖 |
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d***a
发帖数: 73 | 16 See job description below. Recent college graduate only.
if interested, 请站内联系。
Sr. Materials Engineer
Description
Come join a creative team of Senior Materials Engineers dedicated to the
development of microelectronic packages. Our engineers provide project
management, package design/development, and sustaining support for
integrated circuit or semiconductor assemblies. Our engineers work in cross-
functional teams to define overall package performance and specification and
realize technology ce... 阅读全帖 |
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z***x
发帖数: 9 | 17 来自主题: Macromolecules版 - Talk-3 Polyhomologation Reaction.
K. J. Shea, UC-Irvine
JACS, ASAP.
Chemistry, A European Journal, 2000, 6, 1113
利用硼烷的1，2-migration, 以ylide作为单体， 实验一种全新的方法合成高分子。
the polymer chain grows one carbon at a time.不同于传统的高分子合成，
the polymer chain grows two carbon at a time.
该反应为一living polymerization method， 利用不用的硼烷可以合成出telechelic
polyethylene， 不同的topology,
利用不同的ylide ， 可以合成出不同的polyolefin.
很fancy的一种合成方法， 虽然看不出有多少工业应用前景。。 |
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z***x
发帖数: 9 | 18 来自主题: Macromolecules版 - talk-4 Chain Walking produces Branches.
Zhibin Guan, Dupont CR&D,
Science, 283, 2059, 1999
a palladium-diimine catalyst catalyze ethylene polymerization.
利用late transition metal的b-elimination, hydride addition 实现chain walking
process.
通过调节气压改变的chain-walking 和polymer chain propagation
的速度从而实现tuning
polyethylene topology with pressure which can form linear PE to Dendritic PE.
It is very promising to make dendrimer by simple conventional polymerizaiton
method instead of tedious multi-step synthesis. |
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w********h
发帖数: 12367 | 19 Robert Langer is the No.1 in this field.
There is one review article in Chem Rev.
1999, 99, 3181-98.
Polymeric Systems for Controlled Drug Release. |
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w*z
发帖数: 35 | 20 could anybody give a better method? my polymer is very special, not made by
condensation or ionic polymerization.
mixture |
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w******z
发帖数: 29 | 21 what is PVI???? what initiator did you use? |
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z*******g
发帖数: 9 | 22 啊。。谢谢。。这片文献我有的说。这个溶液聚合和本体聚合差
远着呢。溶液聚合很好控制，但是得到的都是很高分子量的东西。
而我要的是小分子量的，所以用本体聚合。但是这个局部过热的
问题我就是解决不了。想来这个好像是本体聚合同有的问题。
就是想问问大家都是怎么解决的。。。
谢谢你了。 |
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b**s
发帖数: 589 | 23
Are you sure?
见基础教程－5
溶剂的加入可以很好地带走聚合反应热，有利于反应的控制，有利于聚合
度的增大，但活性中心向溶剂转移，总的结果是聚合度下降。
~~~~~~~~~~~~~
多放点催化试剂？增加活性中心
降低温度，让它慢慢聚？
加强搅拌？
象， |
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c******h
发帖数: 4573 | 24 本体聚合的温度过热问题的确很麻烦，前几天我们实验室
做AA的本体聚合也遇到这个问题。
后来就是控制引发剂用量，用超级恒温槽控制较低温度
反应了大约4天时间，最后总算得到部分产物。 |
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b**s
发帖数: 589 | 25 哪篇文献？要么是假文章，要么是他加了什么链转移剂之类的没写
写个email 问问 |
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d*****s
发帖数: 313 | 27 I mean, in the polymerization process, I want the polymer to be aligned as
much as possible. Is there any general trick for this purpose? Thanks. |
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s****u
发帖数: 19 | 28 我刚开始这步骤，没任何经验， 那位大虾能指教几下，小弟不甚感激！ |
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b**s
发帖数: 589 | 30 不用，只要用简单的玻璃设备常压就可以，查一下国内的文献（在国外杂志发表的）
一般可以查到。如查不到，我再详细的告诉我
polypropylene溶在甲苯中，用slurry的方法，很安全。
成 |
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b**s
发帖数: 589 | 31 不用，只要用简单的玻璃设备常压就可以，查一下国内的文献（在国外杂志发表的）
一般可以查到。如查不到，我再详细的告诉我
polypropylene溶在甲苯中，用slurry的方法，很安全。
成 |
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s****u
发帖数: 19 | 32 真的？？太好了！因为我刚开始搞这个，没经验！看来我找到到大虾了：）
我查了文献，一般的方法都要向催化剂，氢气，高压等， 像Ziegler-Natta 等方法，能
告诉我怎么找到你提到的这文献吗？作者？关键字？？你说的slurry方法应该对我很有用
，先谢了！！：）
）
的 |
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w********h
发帖数: 12367 | 35 Ghasem NM
Effect of polymer growth rate and diffusion resistance on the behavior of
industrial polyethylene fluidized bed reactor
CHEM ENG TECHNOL 24: (10) 1049-1057 OCT 2001
Kim JY, Choi KY
Modeling of particle segregation phenomena in a gas phase fluidized bed olefin
polymerization reactor
CHEM ENG SCI 56: (13) 4069-4083 JUL 2001
Fernandes FAN, Lona LMF
Fluidized-bed reactor modeling for polyethylene production
J APPL POLYM SCI 81: (2) 321-332 JUL 11 2001
Fernandes FAN, Lona LMF
Heterogeneous |
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u********o
发帖数: 258 | 36 thanks you very much, wonder. maybe i didn't explain my problem clearly.
I don't want to study polymer reaction, but I am interested in using polymer
as filled material in fluidized bed, currently i focus on cold-model experiment
I used Web of Science(ISI) and searched almost the same results as u
recommended, most paper discuss about polymerization, in fact this is not my
field, hehe.
anyway, you gave me many good hints, they are useful.I will have a quick look
of these papers, there should be |
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a****r
发帖数: 4965 | 37 Wu, Zenggang; Zhou, Chixing; Qi, Rongrong. The preparation of phenolic
resin/montmorillonite nanocomposites by suspension condensation polymerization
and their morphology. Polymer Composites (2002), 23(4), 634-646. |
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c*s
发帖数: 2145 | 38 来自主题: Macromolecules版 - 这么大 Chem. Mater. 2002, 14, 4017-4020
Synthesis of Monodisperse Emulsion-Templated Polymer Beads by
Oil-in-Water-in-Oil (O/W/O) Sedimentation Polymerization |
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b**s
发帖数: 589 | 39 【 以下文字转载自 Chemistry 讨论区,原文如下 】
发信人: LowIQ (弱智), 信区: Chemistry
标 题: Re: 废弃电信卡??回收??处理
发信站: The unknown SPACE (Thu Nov 7 01:45:24 2002), 站内信件
polymeric wastes in the u.s. are commonly put away in
landfills or burned in incinerators, if no effective
recycle method is available.
b/c burning PVC produces dioxin and HCl, scavengers
are required for all incinerators in the u.s. |
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w********h
发帖数: 12367 | 40 Personally I think this article was written using some not-so-accurate
terms, for example, Flory's theory. But I am not ready to doubt the
information in this article.
As to your questions,
(1) They have been attempted to do so for 40 years, meaning they tried
other methods without using C60.
(2) Not polymerized C60 is harder than diamond, but the three-dimensional
polymer (crosslink-like, I think) containing C60.
于
that
hehe.
yet)
出
的
超
合
物
三
代
了
，
基
大
程
的
实 |
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a***n
发帖数: 578 | 41
no. It is not a polymer that containing C60. It is polymerized C60. kind of
hot in carbon technology.
Here is a paper related to C60 polymer.
"Debye-Scherrer ellipses" from 3D fullerene polymers: An anisotropic pressure
memory signature
SCIENCE
283 (5408): 1720-1723 MAR 12 1999
终
harder
observed
指
新
有
聚
合 |
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a***n
发帖数: 578 | 42 Mechanical properties (Vicker's hardness, Young's modulus, and fracture
toughness coefficient) have been studied for the three-dimensionally
polymerized, amorphous, and nanocrystalline diamond-plus-graphite composite
carbon phases prepared from fullerite C-60 by temperature treatment under
pressure. The hardness was found to increase gradually with the synthesis
temperature. The experimental values of hardness are well correlated with the
density of samples regardless of the phase structural nat |
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t******l
发帖数: 3060 | 43 Principle of Polymerization.
George Odian.
everyone here should hv read b4. |
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a***n
发帖数: 578 | 44 【 以下文字转载自 Chemistry 讨论区,原文如下 】
发信人: argon (argon), 信区: Chemistry
标 题: My proposals
发信站: The unknown SPACE (Fri Jan 17 18:29:07 2003) WWW-POST
first is related to organic solar cell,
second is related to MEMS fuel cell,
third is related to polymerized C60.
The strangest thing to me is that although all these stuffs already had input
big bucks for more than ten years, still nothing exciting.
People who are doing this topic please discuss with me. I am kind of expert at
those fields right now. kek |
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a***n
发帖数: 578 | 45
I
first two targets are the lowest target to go to commerilize, otherwise the
replacement will occupy the market. Third target is the reason why polymerized
c60 is interesting.
had |
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w********h
发帖数: 12367 | 46 but they already reported some results in Russia, right?
did u check those papers?
That
say
or
polymerized |
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w********h
发帖数: 12367 | 47
~~~~~~what's that?
generally people are trying to get exfoliated polymer-clay
nanocomposites using in-situ polymerization. But I don't
think it is an appealing subject. |
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p**y
发帖数: 95 | 48 It is hot years ago.
But now, it is not so promising since no one
can really apply this technology to industry.
If such radical polymerization can not have
industry application, can you see any thing good
here? |
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y****u
发帖数: 50 | 49 In ATRP, the concentraion of free radicals is kept very low
so as to minimize chain transfer and termination.
Most polymer chains are dormant with a halogen atom as endgroup.
A typical ATRP system consists of a monomer, initiator (usually alkyl halide),
catalyst (transition-Metal complexes), and ligand.
The added amide might react with other component instead of the free radical.
Quenching is used in living anionic polymerization to
prepare end-functionalized polymers,
but in ATRP, the halogen c |
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y****u
发帖数: 50 | 50 After a rough reading, I know Living Radical/Carbocationic Polymerizations are
nothing. Polymer science and engineering, like many other disciplines, is
strongly market-oriented.
Why was there so much fanfare about ATRP in ACS Boston Meeting? |
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