y***o
发帖数: 416 | 1 高分子論文集 (Polymer Journal) 59(4), 178-189, 2002-04-25
粘土鉱物系メタロセン触媒の開発
Development of Clay Mineral-Based Metallocene Catalyst
谢谢了。 |
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b********d
发帖数: 720 | 2 这两种polymer都只有C,H,O三种元素，没有别的元素
XPS不可以区别
然后呢，MW也比较接近
感觉很tricky，不知道怎么区别。。。。
OH
bond |
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y**********3
发帖数: 339 | 3 XPS 结果可能不是很明显。
你的polymer层有多厚？小于1微米的可以试试SIMS（二次离子质谱）。 |
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b********d
发帖数: 720 | 4 是的
XPS不行，我的film很薄，每层只有大概1nm，然后是两种polymer alternating in a
layer by layer way
XPS 采集到的深度有1-10nm，所以不能用来表征区分某一层
我找到了一个方法，用methylene blue,它会和-COOH结合，然后再用光谱采集
methylene blue的谱图 |
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n******t
发帖数: 367 | 5 现在知道一个产品是carboxylic acid based polymer in water。请问用什么分析手段
能够测定具体是哪种单体的共聚？是丙烯酸共聚，马来酸，还是丙烯酸-马来酸共聚？
请高手不吝赐教。
多谢！ |
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a*******1
发帖数: 105 | 6 Hi all,
I am a research AP working in the field of biodegradable polymers, tissue
engineering, drug delivery, etc. I have reviewed 7 papers for 3 Journals,
and I look for more opportunities. Any help will be highly appreciated!
Please contact me here. Thank you!!! |
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G*********3
发帖数: 28 | 7 想问问polymer coating, 主要是做UV curable coating
这个方向的前途如何， 好找工作吗？
主要有哪些大公司招这样的PhD.
多谢，多谢~~ |
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b****n
发帖数: 379 | 8 有没有办法溶解Polyethylene terephthalate而不破坏结构？分子量在20000～30000之
间。有人说用THF可以，但我试了不行啊。谢哈！
另外，有没有这方面比较好的书或者review啊？以后会涉及更高分子量的各种polymer
。 |
|
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b****n
发帖数: 379 | 9 需要找lab能够analyze polymer resins，找出里面所有的杂质或者additive，
sensitivity越高越好，最好能找出ppm级别的杂质。不管是学校或者testing service
lab都可以。大家有推荐吗？ |
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p****g
发帖数: 92 | 10 【 以下文字转载自 ChemEng 讨论区 】
发信人: phdggg (博士哥哥), 信区: ChemEng
标 题: 导电凝胶（electro conductive gel or polymer）
发信站: BBS 未名空间站 (Mon Apr 21 19:18:01 2014, 美东)
如何制备？最好是不需要特别的设备那种。希望比较稳定, 力学性能 ，生物相容性较
好。请站内回复，谢谢！
I am in a medical school at NY and may have postdoc job for you if you can
send me your relevant CV. |
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F******e
发帖数: 119 | 11 【 以下文字转载自 Faculty 讨论区 】
发信人: fishbone (semi), 信区: Faculty
标 题: 求问conductive polymer用作超级电容器可投的review杂志
发信站: BBS 未名空间站 (Sat May 10 14:00:57 2014, 美东)
求问下有哪些杂志可以投非invited的review文章。关于导电高分子用作电容方向的。 |
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g***q
发帖数: 94 | 12 【 以下文字转载自 Macromolecules 讨论区 】
发信人: gnaiq (强), 信区: Macromolecules
标 题: 求赐审稿： polymer composite, surface modification, battery-related, graphene related， porous material
发信站: BBS 未名空间站 (Wed Feb 4 02:19:13 2015, 美东)
PhD毕业一年，做的东西比较杂，可审的方向也比较多，希望各位有机会的赐给我几篇
审稿吧。
准备申绿卡 不易啊。。。
站内联系，谢谢！！ |
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f******n
发帖数: 640 | 13 本人phd专业是fuel cell, polymer morphology, Nafion, 文章发了一些，也曾经帮老
板审过一些文章
希望得到版上大牛的帮助，累积审稿经验。希望能站内邮件，会提供更详细的资料，如
果有机会拿到审稿的话，一定会感激不尽！ |
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M*******y
发帖数: 14 | 14 真诚的请求为化工/化学类杂志审稿的机会，今年的H1b没有抽上，希望能攒一些review
用来帮助申请绿卡。
我的方向是Colloid chemistry, surfactant/polymer chemistry,包括在Petroleum
phase behavior, enhanced oil recovery, water treatment等方面的应用，在这些领
域发表了近十篇文章和专利，有十篇审稿的经验，审稿认真负责，查阅资料尽量详尽，
提出意见谨求充分中肯。
如果有机会，请通过email联系我: gregyu at ou dot edu
小弟在此拜谢！ |
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s*****y
发帖数: 7 | 15 同求审稿，希望能攒review用来帮助申请绿卡。
我的方向是dentin adhesive, polymer composite, colloid chemistry,
photopolymerization.在这些领域发表了30+篇文章，有十篇审稿的经验，身高认真，
如有需要请站内联系或者[email protected]
/* */,可提供简历！谢谢 |
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c********r
发帖数: 2227 | 16 在申请绿卡，请问大家Polymer Preprints算是conference paper还是peer review
paper
非常感谢 |
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p****e
发帖数: 40 | 17 最好有身份和背景吻合，职位要求如下，请私信联系， 谢谢。
Your role:
• Work in Thick Film R&D Team. Focus on thick film product
development and scale up for LED related applications.
• Operate FAB and materials testing tools for product development and
application support activities in the assigned areas.
• Conduct characterization of new materials and optimization of new
formulations to further improve performance of the products targeted.
• Summarize test results in adequate technical reports and ... 阅读全帖 |
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k****i
发帖数: 36 | 18 真心求推荐审稿。
涉及的领域主要有polymer chemistry, self-assembly, drug delivery,
bioconjugation, covalent organic framework, porous organic materials, hybrid
materials.
提前谢过啦。
邮箱[email protected]/* */ |
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y**i
发帖数: 44 | 19 因为不是化学背景,现在要做的又是关于alignment layer 的研究,
我所知道的大部分的alignment layer 是
polymer,
有没有那么几种 特殊的alignment layer. 首先他们是透明的, 当被镀在玻璃上面的时候
, 带电的group 朝上,
比如 -OH 什么的, 正点负电都好, 如果能够继续控制 以达到 随意控制正电 或者 负电
基 朝上更好. 如果有什么文章讨论过的话, 还望大家告诉我一下,感谢先. |
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S****D
发帖数: 5 | 20 化学PhD找博士后，想往Biomedical Engineering 方向或者传统Polymer方向选择，不
知道那个在美国相对好找工作一点？ 我也想回国工作，有人知道在国内这两个专业那
个更好找个好点的工作呢？
另外，做nanoparticle-based drug delivery将来能找到工作吗？感觉opening 好少的
说，回国可能就更呛了，有做这方面的行家指点一下行吗？谢谢了 :) |
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N*******a
发帖数: 94 | 21 急需审稿应对RFE，请各位前辈提供机会，不胜感激！
本人研究方向主要是纳米复合材料（polymer composites, metal/ceramics
composites), 固体力学，纳米碳管. 另外能源领域也有涉及
发过4片journal，有4-5个会议 paper，
目前在为一个杂志一个会议审稿，有过5-6次审稿经验。
email：[email protected]/* */
或则版内联系
谢谢大家，今后一定回馈本版。 |
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b*********h
发帖数: 89 | 22 小女子不才却也好高骛远的想做patent law。 在版上和其他地方做了点research,发现
最desirable的背景是biochem和EE
etc. 不知道我的physical chem/polymer science PhD背景是否有优势呢？多谢！ |
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n***e
发帖数: 461 | 23 I guess so. Having a ph.d. does have this little benefit that the rank of
law school can be relaxed a little bit. but by how much - I don't know. You
know your marketability is linked to every bit your background, and of
course, the market itself, which is in really bad shape now. IP law has also
been hit hard in case you don't know. Because polymer itself isn't a highly
sought after specialty area in patent law, you probably still want to aim
high. as getting into law school is a game solely de |
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w********h
发帖数: 12367 | 24 【 以下文字转载自 Science 讨论区,原文如下 】
发信人: sayyou (cowboy), 信区: Science
标 题: who is doing rheological properties testing on polymer composites??
发信站: The unknown SPACE (Sat Mar 16 13:15:47 2002) WWW-POST
every GGJJs, can you talk this topic with me. I don't know how to start and
what kind of result I can get!!!!!! |
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b**s
发帖数: 589 | 25 Though I have no experience on 氢化polymer, I remember that metallocene
catalyst used to be the intensively used 氢化 catalyst, but now it becomes the
star in another field as we know. |
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s*****n
发帖数: 430 | 26 en, i am working in Polymer Source.
i guess we have what you are looking for.
try www.polymersource.com |
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a****y
发帖数: 10 | 27 在真空下，加热某种polymer溶液，希望是把水份
蒸出来，高分子留下。在哪里可以查到合适的温度？
(真空度很高，只有几个mtorr)
再就是我担心，会不会形成共沸物，在哪里去查呢？ |
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w******r
发帖数: 43 | 28 If you dry the polymer under vacuum, you do not need to boil it.
Just above the Tg is OK. It is very fast for the low pressure. |
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t*g
发帖数: 300 | 29 polymer 不会形成共沸物吧，又不是小分子。 |
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w*z
发帖数: 35 | 30 who can introduce polymer facuty in caltech? my friend want to find a pstdoc
there. thanks. |
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j*********e
发帖数: 3 | 31 www.polymer.org ? 没去过 ,有空看看去 |
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z***x
发帖数: 9 | 32 I have made a polyethylene. GPC shows two different peaks, each peak has the
PDI of around 1.1. and the first peak shows about two times molecular weight
of the second peak.
Is there any simple way to separate these two polymers.
Thanks a lot |
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z***x
发帖数: 9 | 33 I need the polymer for NMR analysis.
and we don't have recycle GPC in my lab. //sigh.
and the polyethylene I made is perfect linear and very low molecule weight.
one is around 600(Mn), the other is around 2000 (Mn).
I think the fractionation by suitable solvent will be the easist way to carry
out. then the problem will be what kind of solvent and temperature. I wonder
if anyone can give me some hints.
Thanks
的
CO
个
溶
the
weight |
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d*****s
发帖数: 313 | 34 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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q***i
发帖数: 170 | 37 No.
I think some kind of hydrogel, polyacrylamide, is kind of
good elastic polymer. |
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p******y
发帖数: 8 | 38 需要里面的一篇文章
TRENDS POLYM SCI 5 (8): 262-267 AUG 1997
如果有请发到
s***********[email protected] |
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b**s
发帖数: 589 | 39 PEO can not be dissolved in DMF? impossible
DMF is a good solvent for many polar polymers : nylon, PU, PEO...
use a little bit of heat, try again |
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c*s
发帖数: 2145 | 42 【 以下文字转载自 Chemistry 讨论区,原文如下 】
发信人: simpsci (桀骜蚕丝), 信区: Chemistry
标 题: Anybody going to Gordon Research Conference-Polymer(West)??
发信站: The unknown SPACE (Sun Dec 15 07:01:49 2002) WWW-POST
In Ventura, CA.
Anyone is going? Need to find a roomate on their registration page! Please
email me if you are also going, maybe we can have some chat or become
roomates.
SS |
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a***n
发帖数: 578 | 43 For example, if I want to sythesis some functional polymer. Where should I
start with? How do I know it is feasible?
any expert has suggestion? thanks in advance.
for example:
-[ CF2CF ]n-
|
O
[CF2CF2]m-O-CF2CF2CN |
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a***n
发帖数: 578 | 44 Thank you so much. //bow
where can I find related reference talking about this?
especially flurorited polymer? |
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t***m
发帖数: 114 | 45 【 以下文字转载自 Chemistry 讨论区 】
【 原文由 fruitlake 所发表 】
比如说polylysine, 知道分子量(比如M.W.是350,000). 那大约多大呢? 是不是在水溶液
里和在glass surface上的size很不一样呀?
这样的问题是不是在有关polymer的书里很容易查到呢?
上网查过, 但好象总是很复杂的样子, 有一大堆参数, 我只想要最简单的估算.
谢谢啦. |
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s***e
发帖数: 911 | 46 计算这个你的先估计random coil size. 你得先知道你的polymer的弯曲弹性才能计算.
random coil size还和溶液离子浓度相关, 也和空间维数相关. 所以在水溶液和在
galss surface肯定不同. |
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s***e
发帖数: 911 | 47 oh..我说的是理论计算. 这类polymer的弹性应该都是有数据可查的吧. 有了弹性你就
可以理论计算出了.
此外和维数相关. 他说的glass surface的情况和水溶液的情况肯定不同. |
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a***n
发帖数: 578 | 48 hehe. good arguement.
Since no money, I won't spend more time on it. But I can tell what a general
simulation goes. For example, if you want to simulate this system, you have to
consider what parameters are your input parameters, what data you want from
simulation. Then you set up kinetic equation based on those parameters. Then
you figure out a numerical way to solve this kinetic equation.
For your case, viscosity of polymer molecules in solution, the friction
between solvent and surface, tempe |
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s***e
发帖数: 911 | 49 我有印象---De Genne讨论过polymer brush的问题. 你这个问题是否可以借用类似的
讨论under外加加速度场呢? |
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l*****o
发帖数: 82 | 50 Give me some clues, please.
Was it discussed in some book? or Journal or somewhere?
It's too difficult to find it just by "De Gennes" and "Polymer brush". |
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