y***e
发帖数: 6082 | 1 发信人: veryflu (望), 信区: chemistry
标 题: polymer science(转载)
发信站: 饮水思源 (2003年06月19日03:48:11 星期四), 站内信件
【 以下文字转载自 ChemiTech 讨论区 】
【 原文由 CIH 所发表 】
1 PROG POLYM SCI
0079-6700 2138 7.279 0.778 45 5.6
2 ADV POLYM SCI
0065-3195 2547 5.389 0.750 16 9.8
3 MACROMOLECULES
0024-9297 54526 3.751 0.672 1261 6.6
4 MACROMOL RAPID COMM
1022-1336 4077 2.901 0.455 143 5.1
5 BIOMACROMOLECULES
1525-7797 775 2.496 0.440 182 1.9
6 J POLYM SCI POL CHEM
0887-624X 11521 |
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a***n
发帖数: 578 | 2 introduce Grubbs' current fancy chemistry:
polymer template.
basic idea is to have a substrate binding with certain sequence acceptor
sites. Those acceptor sites arrange in a pattern or a line. Then target
oligomers come in and sit on those acceptor sites. Add catalysts in, and
target polymer got sythensis.
hehe. pretty fancy. Interested guy search his papers. Don't know whether he
published this topic.
cyclic polymer.
He can make [ch2-ch2] as cyclic polymer. The reason to make this is because
i |
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w********h
发帖数: 12367 | 3 for Polymer major,
it belongs to Polymer Chemistry no matter you are working in Polymer Physics
or Polymer Engineering. |
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C***S
发帖数: 175 | 4 a weak cross linked polymer, if the polymer is hydrophilic, it is hydrogel.
Here I mentioned the weak crosslinked polymer, just to differiente them
from the rubber, which as I think is heavily cross-linker.
Weak cross linked polymer mean the system could have the huge capacity
on absorbing solvent, and can endure large shape change. |
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S*****n
发帖数: 6055 | 5 Mark Rank Abbreviated Journal Title
(linked to journal information) ISSN Total Cites Impact
Factor Immediacy
Index Articles Cited
Half-life
1 PROG POLYM SCI 0079-6700 3379 8.482 1.407 27 4.8
2 ADV POLYM SCI 0065-3195 2628 7.320 0.929 28 >10.0
3 MACROMOLECULES 0024-9297 65235 3.898 0.658 1366 7.1
4 MACROMOL RAPID COMM 1022-1336 4994 3.366 0.554 287 4.7
5 BIOMACROMOLECULES 1525-7797 2535 3.299 0.488 330 2.6
6 J POLYM SCI POL CHEM 0887-624X 13090 2.773 0.458 614 7.2
7 POLYMER 0032-3861 26473 |
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c*****e
发帖数: 238 | 6 That's a good direction, but it does not belong to traditional polymer
science, therefore is not being mentioned much here.
Conducting polymer is better classified as EE or physics here, like A.J.
Heeger is doing. You better know some condensed matter theory, like band
theory.
I think conducting polymer is still treated as a 1D object, therefore the
polymer character is not important, at least to the eyes of the main players
in the field. |
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w********h
发帖数: 12367 | 7 Polymers are promising tools for gene therapy
April 24, 2002 - New methods are being developed to cure illnesses with the
aid of gene therapy. Polymer technology provides new and versatile
possibilities for administering gene doses.
"?Polymers are used to pack the gene to be transferred into particles of the
size of a ten thousandth of a millimetre. These polymers effectively
transport the transferable gene into affected cells and are then dissolved
by the organs,"? explains Project Coordinator, |
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w********h
发帖数: 12367 | 8 Development Of New Polymer Delivery Vehicles For Gene Therapy
MIT scientists are reporting synthesis and laboratory tests of a promising
new group of degradable polymer delivery vehicles for gene therapy. The
polymers are improved versions of materials first described in 2000 that
deliver genes efficiently to specific cells.
The lack of a safe, efficient delivery system for DNA has been a major
barrier to clinical use of gene therapy. Viruses and various polymer
materials have been used in effor |
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D********g
发帖数: 533 | 9 http://en.wikipedia.org/wiki/Lithium-polymer
“
Polymer electrolytes/separators can be solid polymers (e.g.,
polyethyleneoxide, PEO) plus LiPF6, or other conducting salts plus SiO2, or
other fillers for better mechanical properties (such systems are not
available commercially yet). Some manufacturers are planning to use metallic
Li as the anode, whereas others wish to go with the proven safe carbon
intercalation anode.
Both currently commercialized technologies use PVdF (a polymer) gelled with
co |
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b******0
发帖数: 45 | 10 macromolecules 包括 polymer
polymer 包括 plastics
plastics通常是glass transition temperature在室温以上的polymers，但plastics不
一定指某一种材料，经常是各种助剂与polymer的复合物 |
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f**********r
发帖数: 91 | 11 【 以下文字转载自 Chemistry 讨论区 】
发信人: flyingwisher (flyingwisher), 信区: Chemistry
标 题: 含有disulfide键的polymer为什么在THF中会降解？谢谢了。
发信站: BBS 未名空间站 (Fri Dec 16 14:30:59 2011, 美东)
用THF溶解polymer（含有20%左右的disulfide键）做GPC的时候，发现含有disulfide
键的polymer在THF中会降解，过几个小时，分子量会变小一些，但是不知道为什么，按
理说这种polymer对氧气不敏感，氧气应该是往省城disulfide键的方向的。谢谢了。 |
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r****o
发帖数: 104 | 12 A post-doc position in Petroleum Engineering program of Missouri University
of Science and Technology is available.
The position is open for a candidate who has strong background in polymer or
super absorbent polymer synthesis and evaluation. Our plan is to
synthesize two kinds of cross-linked polymers: the first type can be
degraded
into high viscous polymer under reservoir temperature at a designed period
of time (e.g. 6 month at 45 C); and the second type can be self-recross-
linked
together ... 阅读全帖 |
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j*******u
发帖数: 22 | 13 polymer PHD毕业 ，求大牛帮忙，推荐面试工作
polymer PHD毕业 ，求大牛帮忙，推荐面试工作
polymer PHD毕业 ，求大牛帮忙，推荐面试工作
重谢 |
|
y*******o
发帖数: 746 | 14 【 以下文字转载自 Chemistry 讨论区 】
发信人: yuanfeiwo (原非我|梨园深), 信区: Chemistry
标 题: [JOB] Senior Polymer Chemist@Denver，要求有绿卡
发信站: BBS 未名空间站 (Mon May 23 14:52:41 2011, 美东)
这个recruiter是真的急着招人，有绿卡并且有composite经验的人试一下这个职位吧。
投简历的时候说明是我refer你的（那个recruiter非得让我给他推荐一个同事/同学），
不要说是从网上看来的……你给我站内信我告诉你我的名字。
下面是recruiter给我的信：
I am engaged on a search for a Senior Polymer Chemist with
composites experience. My client is a very exciting, growth
oriented manufacturer of sustainable products in Denver. The
successful candidat... 阅读全帖 |
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m****s
发帖数: 18160 | 15 【 以下文字转载自 Postdoc 讨论区 】
发信人: fsypl (mimi), 信区: Postdoc
标 题: PostDoc Position polymer membranes KY
发信站: BBS 未名空间站 (Mon Oct 22 14:41:35 2012, 美东)
Postdoctoral Scholar
The University of Kentucky, Center for Applied Energy Research (CAER) is
seeking to fill an immediate postdoctoral opening. The
successful candidate will develop polymer membrane for gas/liquid separation
. The position requires a Ph.D. in materials science,
membrane separation science, chemistry, chemical engineering, polymer or a
... 阅读全帖 |
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j*******u
发帖数: 22 | 16 polymer PHD毕业 ，求大牛帮忙，推荐面试工作
polymer PHD毕业 ，求大牛帮忙，推荐面试工作
polymer PHD毕业 ，求大牛帮忙，推荐面试工作
重谢 |
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l**k
发帖数: 16 | 17 求Review opportunities, composites, electronics materials, polymer
processing, biodegradable materials, polymer, adhesion, nano materials,
interface and so on.
Thanks! |
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s******e
发帖数: 73 | 18 由于本人懒散，审稿一直没有攒够。再次求审稿
polymer composites/wood composites/resins/adhesives/Fiber-polymer composites |
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M*******m
发帖数: 38 | 19 刚毕业的chemistry phd，帮导师审稿数量大于30篇，独立审过两篇。
方向: polymer chemistry, conjugated polymers, organic solar cell, functional
polymers
如需要CV或者邮箱，烦请站内。
谢谢！ |
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c**********a
发帖数: 6 | 20 Dendritic polymers can be used as effective decoloring agent.
Dendrimers can effectively remove triarylmethane dyes. Its advantages are: (
1) the higher the pH value, the better the decoloring effect, the highest
decolorization rate is 99.8% (2) less dosage, achieve good results with
dosage concentration of 33.3mg / L (3) dendrimer can be reused, and to
maintain a high decolorization activity; (4) Dendrimer has a good treatment
effect for different components of the sewage (5) a low concentratio... 阅读全帖 |
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a*****c
发帖数: 3525 | 21 Making the Smallest, Most Perfect Polymer Films
http://www.newswise.com/articles/view/549354/
Libraries
Science News Keywords
BLOCK CO-POLYMER, LATTICE, LATERALLY ORDERED ARRAY
Contact Information
Available for logged-in reporters only
Description
Rarely do researchers use “transformative” but a new technique may
revolutionize microelectronic storage and photovoltaics and open new vistas.
It’s a faster, simpler way to make defect-free thin polymer films with the
smallest domains ever and ultr |
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K*****0
发帖数: 41 | 22 【 以下文字转载自 THU 讨论区 】
发信人: whuloser (whuloser), 信区: THU
标 题: Postdoc Position Available in the Field of Polymer Chemistry
发信站: BBS 未名空间站 (Sun Oct 21 14:50:11 2007)
Postdoc Position Available in the Field of Polymer Chemistry
October 20, 2007
We are currently looking for a Postdoc in the field of polymer chemistry at
the University of Wisconsin-Milwaukee. We intend to fill this position as
soon as possible. This Postdoc will be working on synthesizing novel
biomaterials for biomedical applications |
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b***e
发帖数: 1008 | 23 【 以下文字转载自 Macromolecules 讨论区 】
发信人: barge (路人), 信区: Macromolecules
标 题: How to determine free volume in polymers
发信站: BBS 未名空间站 (Mon Jun 7 22:17:07 2010, 美东)
刚刚接触polymer free volume concepts,请问下大概都有哪些办法能定量测定/确定某
polymer在glass transition temperature前后的free volume的变化？因为刚接触，查
阅相关文献一时挺难找到切入点。非常感谢高手提点下！
谢谢 |
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c********r
发帖数: 2227 | 24 Chung, C. I.; Sauer, J. A. Low-temperature mechanical relaxations in
polymers containing aromatic groups. Journal of Polymer Science, Polymer
Physics Edition (1971), 9(6), 1097-115.
对不起，没有link可以提供
m************[email protected]
非常感谢 |
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h**i
发帖数: 8 | 25 【 以下文字转载自 Macromolecules 讨论区 】
发信人: hexi (格温普兰), 信区: Macromolecules
标 题: two baozi for how to remove water from polymer
发信站: BBS 未名空间站 (Tue Aug 31 20:06:44 2010, 美东)
if a large scale of polymer has been dissolve in nonpolar solvent and washed
by water, the polymer would be contain small trace of water in it. Anyone
suggest a way to remove the trace of water by a simple method without
bringing any chemical change? Thanks. |
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f******n
发帖数: 137 | 26 We are looking for a Polymer Material Scientist/Engineer postdoc with
experience in polymer materials development and characterization,
spectroscopy methods (IR, Raman), TGA/DSC, cure viscosity monitoring,
materials and composite performance optimization, resin cure/kinetics, aging
of materials, aging models and lifetime prediction.
Polymer Material Scientist Postdoctoral Appointment Sandia Corporation
Albuquerque, NM
You can view and apply for this job at: http://www.sandia.gov/careers/search-o... 阅读全帖 |
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y***e
发帖数: 6082 | 27 估计要绿卡的吧，而且background check一半要很长时间。。。
We are looking for a Polymer Material Scientist/Engineer postdoc with
experience in polymer materials development and characterization,
spectroscopy methods (IR, Raman), TGA/DSC, cure viscosity monitoring,
materials and composite performance optimization, resin cure/kinetics, aging
of materials, aging models and lifetime prediction.
Polymer Material Scientist Postdoctoral Appointment Sandia Corporation
Albuquerque, NM
You can view and apply for this job at: ... 阅读全帖 |
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s**********e
发帖数: 601 | 28 哪位大侠有ACS membership和账号，帮忙找一片文献，是Polymer Preprints。 我试了
，好像不是他们的membership，就不能打开他们的online文献。多谢。
New conjugated thiophene materials prepared from automers.
Polymer Preprints (American Chemical Society, Division of Polymer Chemistry)
(2010), 51(2), 484-485. |
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z******g
发帖数: 28 | 29 不知道够不够资格申eb1,希望多拿一些paper review 的机会。
我的专业是: polymer synthesis (free and controlled radical,insertion polym.
etc), amphiphilic polymers, micelles, organometallics.原意付一定报酬。
本广告长期有效，拜托大家有机会的时候可以关照我:) |
|
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f**********r
发帖数: 91 | 31 用THF溶解polymer（含有20%左右的disulfide键）做GPC的时候，发现含有disulfide
键的polymer在THF中会降解，过几个小时，分子量会变小一些，但是不知道为什么，按
理说这种polymer对氧气不敏感，氧气应该是往省城disulfide键的方向的。谢谢了。 |
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b********d
发帖数: 720 | 32 比如(CH2F2)n,PVA之类已经发现可以用作organic dielectric的polymer
怎么算dielectric constant呢？
我知道怎么算polymer的HOMO-LUMO bandgap,可以大致判断一个polymer分子有没有作为
dielectric的可能性，不过更精确的dielectric constant呢？ 怎么算？
谢谢！ |
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y***o
发帖数: 416 | 33 Polymer Engineering & Science
Volume 39, Issue 8, pages 1444–1455, August 1999
Thermal characterization of ethylene polymers prepared with metallocene
catalysts
P. Starck*, P. Lehmus, J. V. Seppälä
Polymer Engineering & Science
Volume 43, Issue 12, pages 1878–1888, December 2003
Quantitative determination of short-chain branching content and distribution
in commercial polyethylenes by thermally fractionated differential scanning
calorimetry
Mingqian Zhang, Sieghard E. Wanke
链接：
http://... 阅读全帖 |
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w********h
发帖数: 12367 | 34 welcome.
As to pure polymers, especially monodisperse samples,
you can get a master curve of G' or G",
and in terminal region, G' has a frequency dependence with a power law of 2,
while G" has a power law of 1.
the crossover point of G' and G' reflects the relaxation time, which is one of
the most important parameters for polymers.
Polymers with fillers will show significantly different master curves.
First of all, you will lose the perfect terminal region.
And the plateau modulus will change.
I |
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b**s
发帖数: 589 | 35 这一阵子，奉导师之命order polymer，导师给了两个分子量的值，可是问了几家，都
只给出Inherent Viscosity,导师认死理，非要给出具体分子量的公司，只好在此求救
1。你们order polymer的时候都有具体分子量吗？
2。买polymer的都有哪些公司呀？
3。哪几家的东西即多又便宜？
限美国公司 |
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e****d
发帖数: 16 | 36
can we say the polymer is crosslinked if the polymer is neither soluble nor
meltable?
PS: i am working on Polymer Science. :) |
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z*x
发帖数: 3 | 37 Usually, people try to make exfoliated PCN for structural materials;
while for functional polymers,such as optical polymers,we usually get the
intercalated PCN.There have been many paper for the structure and conformation
of polymer chain in the layer space of clay. |
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w********h
发帖数: 12367 | 38 sorry, it is.
presentation of the
section.
this
Natural
collagen in
polymers
polymer
began
primarily
had
polystyrene,
polyamides,
and
epoxy
fibres.
paint
speciality
sulphide)
and
polymers
examples
steps
keep
rubber
could |
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w********h
发帖数: 12367 | 39 The questions are rather simple.
Such as:
what's exfoliated clay?
what's the advantage of clay-polymer nanocomposite?
How to use X-ray to determin the exfoliated sturcture
of clay-polymer nanocomposite?
List the methods to prepare clay-polymer
nanocomposite?
What's the chemical composition of typical clay?
What are the thickness and transverse dimensions of a typical clay sheet?
What properties you can improve other than strength and modulus?
How are the clay sheets separated? Are clay sheets us |
|
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w********h
发帖数: 12367 | 41 big surprise.
progress in polymer sci jumped to No.1...
Macro Rapid Comm jumped to 2.9
EPJ also jumped to 0.9
Acta Polym Sin dropped to 0.28.
Polymer continously increases under Dr.Cheng's leading.... |
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a***u
发帖数: 9 | 42 I am not sure if you have tried removing DMF or not. As I said before,
increasing the concentration of the polymer solution may be more helpful than
increasing the amount of CH3CN.If you start with a concentrated polymer
solution and add a lot of CH3CN into the solution but there is no
precipitation or the solution is only cloudy, that means CH3CN is not a poor
solvent for the polymer and it is better to follow the other person's
suggestion to try some other poor solvents.
As to your question, i |
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a***n
发帖数: 578 | 43 Thanks for your hint. I found several papers of Mayes AM.
In his research, polymer funtionalizes as a composite (something like a
support) but not as lithium polymer. In the battery, Li is still storaged in
the carbon block.
There was some paper talking about Li doped polymer itself.
this
this.
industry
the
If you consider Mayes' work, the mobility of Lithium ion intercalate into
graphite is more important. |
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c*******n
发帖数: 1648 | 44 http://acs.yellowbrix.com/pages/acs/Story.nsp?story_id=44084598&ID=acs&scatego
ry=Chemicals&
Polymer materials store data permanently
In their quest for alternatives to silicon, chip manufacturers are
increasingly turning their attention to plastic. Low-cost, easily manufactured
polymers that conduct electricity could revolutionize electronics, they say.
Now, researchers at Princeton University and Hewlett-Packard Laboratories in
Palo Alto, Calif., have fabricated a polymer-based memory device f |
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u****d
发帖数: 2117 | 45 经常看到文章里提到polymer maxtrix阿
here is an example:
the synthesis and characterization of ...nanoparticles within a polymer
matrix at room temperature are reported...
是不是在polymer固态下才有matrix这个概念？
到底是什么？
多谢 |
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t******l
发帖数: 3060 | 46 hehe..
it's very hard to predict what u will do in ur PhD project..
like my case, i was supposed to do some polymer based ligands for catalysis,
yet now , i found small ligands can get better result. so u can see,
my PhD projext name is still old one, 'Polymer blah blah' ,
what i am doing is totally nothing to do with polymer. |
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a***n
发帖数: 578 | 47 thanks.
You are right at the polymer which has the highest hole mobility.
FYI, there is another type polymer called instinc conducting polymer that
doesn't require dopant. |
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w********h
发帖数: 12367 | 48 what's polymer science?
pure polymer science is dead,
because once it was established before 1980,
it has to find ways out.
now, polymer people have to do further based on the initial concept of LONG
CHAIN with other fields such as physics, surface science, materials science,
chemistry, simulations, bio, information, EE, ME, ChE... |
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p******s
发帖数: 137 | 49 Polymer Physics Prize
Purpose:
To recognize outstanding accomplishment and excellence of contributions in
polymer physics research.
Nature:
The prize consists of $10,000 and a certificate citing the contributions made
by the recipient. It will be presented annually.
Establishment & Support:
This prize was established in 1960 by the Ford Motor Company and is currently
supported by the Division of Polymer Physics.
Rules & Eligibility:
Nominations are open to all scientists of all nations regardles |
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b****i
发帖数: 8 | 50 I have no publications before. Now we're submitting
3 papers to 'Polymer'. I wonder how is this Journal like?
And which one is better for Polymer and Macromelocules?
I'm in polymer physics field.
Thanks. |
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