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y***k
发帖数: 57 | 2 【 以下文字转载自 Macromolecules 讨论区 】
发信人: yjkkk (k3), 信区: Macromolecules
标 题: looking for a customer synthesis company in china to do anionic polymerization
发信站: BBS 未名空间站 (Thu Aug 12 19:46:08 2010, 美东)
Dear All:
Would anyone here can help me to find a good capable company in China can do
customer synthesis of polymers by using anionic polymerization?
Thanks a lot in advance! |
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h***s
发帖数: 111 | 3 不知道有谁还有这张ACS的光盘?
帮忙找找这两片摘要，多谢！请帮我发到 s***[email protected]; 翻墙不容易
1 Youliang Zhao, Sébastien Perrier, “Controlled free radical
polymerization mediated by cysteine and glutathione-based chain transfer
agents”, oral presentation, Abstracts of Papers (PMSE Preprints), 233rd ACS
National Meeting, Chicago, Illinois, United States, March 25-29, 2007, 96,
p820-821. （Abstracts of Papers of the American Chemical Society 2007, 233:
- 457-PMSE Preprints.）
2 Youliang Zhao, Sébastien Perrier, “A comparative stud... 阅读全帖 |
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c******y
发帖数: 193 | 5 前段时间找工作，和一些公司有联系。现在找好了，有一个Polymer chemistry,
nanoparticle 的 position (in NC research triangle)发过来，需要的同学可以和我站内联系，我把你的简历REFER给JOB HUNTER。
This entrepreneurial team is advancing their unique delivery platform
and in this role, the Senior/Principal Scientist would assist in the
design, engineering, and manufacturing of highly precise targeted
therapeutics. My client is seeking a highly motivated scientist who
thrives on being challenged and working in a highly collaborative
environment. In this Seni... 阅读全帖 |
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G******e
发帖数: 235 | 6 1)International Journal of Polymeric Materials and Polymeric Biomaterials
Volume 61, Issue 5, 2012
Carboxylate-Ended Poly(ethylene glycol) Macromonomers and their Copolymers
as Inhibitors for Calcium Phosphate and Calcium Sulfate |
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G******e
发帖数: 235 | 7 1)International Journal of Polymeric Materials and Polymeric Biomaterials
Volume 61, Issue 5, 2012
Carboxylate-Ended Poly(ethylene glycol) Macromonomers and their Copolymers
as Inhibitors for Calcium Phosphate and Calcium Sulfate |
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y***o
发帖数: 416 | 8 A Polymerization Kinetics Comparison between a Metallocene Catalyst
Activated by Tetrakis(pentafluorophenyl) Borate and MAO for the
Polymerization of Ethylene in a Semi-batch Solution Reactor
Macromolecular Reaction Engineering
Volume 5, Issue 9-10, pages 418–430
http://onlinelibrary.wiley.com/doi/10.1002/mren.201100015/abstr
多谢了！ |
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y***o
发帖数: 416 | 9 The Road to Early-Transition-Metal Phosphinimide Olefin Polymerization
Catalysts
Organometallics, 2005, 24 (11), pp 2548–2560
DOI: 10.1021/om050096b
http://pubs.acs.org/doi/pdf/10.1021/om050096b
Structure–Activity Correlation for Relative Chain Initiation to Propagation
Rates in Single-Site Olefin Polymerization Catalysis
Organometallics, 2012, 31 (2), pp 602–618
DOI: 10.1021/om200884x
http://pubs.acs.org/doi/pdf/10.1021/om200884x
Titanium Complexes of Silicon-Bridged Cyclopentadienyl−Phen... 阅读全帖 |
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y***o
发帖数: 416 | 10 1. Metalloorganic Polymerization Catalysis as a Tool To Probe
Crystallization Properties of Polymers: The Case of Isotactic Poly(1-butene)
Angewandte Chemie International Edition
Volume 48, Issue 52, pages 9871–9874, December 21, 2009
http://onlinelibrary.wiley.com/doi/10.1002/anie.200904300/pdf
2. Heterogeneous Ziegler-Natta, metallocene, and post-metallocene catalysis:
Successes and challenges in industrial application
MRS Bulletin / Volume 38 / Issue 03 / March 2013, pp 229-233
http://dx.doi.... 阅读全帖 |
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y***o
发帖数: 416 | 11 1. The Ethylene Polymerization with Ziegler Catalysts: Fifty Years after the
Discovery
Angewandte Chemie International Edition
Volume 42, Issue 41, pages 5010–5030, October 27, 2003
http://onlinelibrary.wiley.com/doi/10.1002/anie.200300580/pdf
2. Ultra-Rigid Metallocenes for Highly Iso- and Regiospecific Polymerization
of Propene: The Search for the Perfect Polypropylene Helix
Chemistry - A European Journal
Volume 18, Issue 14, pages 4174–4178, April 2, 2012
http://onlinelibrary.wiley.com/doi/10... 阅读全帖 |
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p******s
发帖数: 193 | 12 想照着2009年邓春晖Angew chemie的Fe3O4@SiO2@PMMA 的文章，做这个东西，用来接功
能蛋白
大家看看，最后的聚合不需要引发剂么？
前文不赘述了，Fe3O4@SiO2-MPS 已经合成好了
要往上面修饰PMMA了，
The sandwich structured Fe3O4@SiO2@PMMA microspheres were synthesized via an
aqueous-phase radical polymerization. Typically, in a three-necked round
bottom flask (100 mL) equipped with a mechanical stirrer, a refluxing
condenser, and a nitrogen inlet, 10 mL of ethanol dispersion of Fe3O4@SiO2-
MPS microspheres were mixed
with 50 mL of aqueous solution containing 5.0 mg of ... 阅读全帖 |
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P******e
发帖数: 129 | 13 公司招几个实习生，要求至少有2年高分子合成经验的，特别是做过control radical
polymerization和Ionic polymerization的, 特别是合成过functional polymers和
block copolymers优先。有意请私信 |
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z***x
发帖数: 9 | 14 来自主题: Macromolecules版 - Talk-2 A Thermally Re-mendable cross-linked Polymeric Material
Fred Wudl, UCLA,
Science, 1698, Vol 295, 2002
利用Retro-DA reaction 实现crosslinked polymeric material的自我修补。
This process is fully reversible and can be used to self-restore a fractured
part of the polymer multiple times under mild condition
非常有意思的idea. |
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q***i
发帖数: 170 | 15 Go google, find what you need.
Keyword: spincast surface polymerization
[PDF] Additive Deposition and Patterning of Ferroelectric Materials
文档类型: PDF/Adobe Acrobat - HTML 版
... a path for air release. Polymerization of the fluid ... with the exposed
substrate's surface,
exclusively. Solution deposited ... treatment of the spincast layer to 140 .
..
groups.mrl.uiuc.edu/payne/additive_deposition.PDF - 类似网页
[PDF] Diffusion and Distribution Studies of Photoacid Generators: Ion ...
文档类型: PDF/Adobe Ac |
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w********h
发帖数: 12367 | 16 http://polymer.chemweb.com/alchem/articles/1015947906148.html
Dielectric mirror fibres
19 April 2002
Polymeric fibres exhibit excellent mechanical properties and are inexpensively
processed but controlling their optical properties is difficult. On the other
hand, dielectric mirrors can manipulate light in high-performance optical
applications but their fabrication is limited and costly. Researchers have now
combined these two systems and fabricated polymeric fibres with exterior
multilayer diele |
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b**s
发帖数: 589 | 17 来自主题: Macromolecules版 - 隔行如隔山 今天我师弟做representation，关于用polymer和金的胶体自组装的课题，用的是dispers
e polymerization得到的单分散胶乳。
问问题的时候，我问你问什么用disperse polymerization而不用其他聚合方法，他支
支吾吾半天答不出，下来之后愤愤的说，聚合都有哪几种，我怎么知道。才知道“隔行如
隔山”呀 |
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b**s
发帖数: 589 | 18 I used to work on the subject of gas phase fluidized bed olefin
polymerization, so I think polymer颗粒 fludization is not a big deal. you can
easily do it.
Try Polystyrene (because it can be polymerized directly into particle
form), But I think all the polymers are 透明或半透明，或白色的 if they are
pure.
静电, in my opion , is not a problem if you use steel fluildized bed
小
，要大于50微米吧，找了半天没有结果。现在在考虑是否可以用polymer颗粒，因为polym
明
或半透明，或白色的，因为要用激光测量技术，要求颗粒具备一定的光学性能refractive
。
谢 |
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a***n
发帖数: 578 | 19 There are a lot of hoaxes in recent years. It really wasted multi-billion
dollars cause some people lied.
成
1. First, polymerized C60 was firstly reported as candidate materials harder
than diamond at 1994 that arouse interests to make superhard materials.
How come 40 years research.
2. That polymerized C60 is harder than diamond is a deduction. They observed
something and deduct that some state of C60 may be harder than diamond so that
they can explain experimental results. God knows whether i |
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y****u
发帖数: 50 | 20 it is intriguing that there is almost no publication on the polymerization of
this monomer.
If I can polymerize it...something will happen. :)
but i don't think radical polymn will work. it could be copolymerized. |
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w********h
发帖数: 12367 | 21 what's the meaning of "dilute enough so can fill in 100-200 nm
channel then I will polymerize it"? why do you need to polymerize
it? |
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b**s
发帖数: 589 | 22 Can ring-open polymerization be achieved in emulsion form?
I mean ring-open emulsion polymerization?
in |
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a*****c
发帖数: 3525 | 23 W Kaminsky, H H Britzinger and J A Ewen will possibly be awarded the Prize for
their contribution to the homogeneous catalysis, stereoselectivity, and
mechanism in olefin polymerization. Homogeneous catalysis has made it possible
to study the polymer chain growth and stereo-control mechanism, which was
unclear based upon hetereogeneous Z-N catalysts.
Kaminsky's contribution is in that he prepared MAO, the cocatalyst for olefin
polymerization, which dramatically increases the catalytic activity t |
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w********h
发帖数: 12367 | 24 今年以来已经被引135次，即将突破1000次大关。
another one on Macromolecules got 550 times.
如果工业化了，这个不授Nobel就没天理了。
但愿王锦山同学能搞上一把。。。
当年应圣康不喜欢的弟子，却实实在在为中国人在高分子化学领域争了脸，留了名。
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 117 (20): 5614-5615 MAY 24
1995
Document Type: Note
Language: English
Cited References: 21 Times Cited: 990 |
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y***e
发帖数: 6082 | 25 据说ysk才是真正搞出ATRP的，被老马抢了，有没有这回事
今年以来已经被引135次，即将突破1000次大关。
another one on Macromolecules got 550 times.
如果工业化了，这个不授Nobel就没天理了。
但愿王锦山同学能搞上一把。。。
当年应圣康不喜欢的弟子，却实实在在为中国人在高分子化学领域争了脸，留了名。
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 117 (20): 5614-5615 MAY 24
1995
Document Type: Note
Language: English
Cited References: 21 Times C |
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c*s
发帖数: 2145 | 26 A technology dating back to the 1950s is finally starting to edge its way into
the marketplace. And one of the companies working to commercialize the
technology--called living controlled polymerization--is seeking new
applications for it.
As David M. Haddleton, founder of Warwick Effect Polymers (WEP), puts it, with
living controlled polymerization, "we can control the polymer terminal groups
and the chain length with a high precision. We can make star-shaped
macromolecules and almost whatever a |
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c****n
发帖数: 134 | 27 people don't solve all the problems; rather, they leave the real challenge
behind.
1) For ATRP: several papers attempted preparing triblock copolymers as
Thermoplastic elastomers, but without decent properties (I would say results
are lousy).
2) It was claimed in a review "virtually all monomers are polymerized in
living XXXX polymerization". A critical review would add "but only a few are
truly living and in most cases the polydispersity is too large". |
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s****e
发帖数: 2934 | 28 ☆─────────────────────────────────────☆
BigBig (bigbig) 于 (Fri Aug 11 03:43:36 2006) 提到:
如果有两种溶剂，A & B
引发剂在A中的溶解性比在B中好很多，不过在B中也是可溶
一般这种情况下，是选用哪种溶剂比较好？
会不会出现由于A和引发剂之间的作用力太强而影响聚合反应得情况？
一般聚合反应选择溶剂的根据是什么？
谢谢指点？
☆─────────────────────────────────────☆
singye (温润如玉) 于 (Fri Aug 11 12:55:18 2006) 提到:
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 ne |
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s****e
发帖数: 2934 | 29 ☆─────────────────────────────────────☆
agostic (若即若离) 于 (Wed Nov 1 00:42:26 2006) 提到:
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 importa |
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r******0
发帖数: 2753 | 30 Your boss could be wrong. I don't think solvent has much effect on the
decomposition temperature of initiators, but it does affect a lot on the
propagation step. High temperature initiators, like t-butyl peroxide,
usually used to polymerize sluggish monomers. On the contrary, low
temperature initiators used to polymerize sensitive monomers. |
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u***n
发帖数: 1263 | 31 Low boiling point (.72.C) and high critical temperature
(54.7.C) of VF necessitate high pressure polymerization similar to that
required
for polyethylene.
为什么low boiling point, high critical temp
要high pressure polymerization....?? |
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a*i
发帖数: 1652 | 32 来自主题: Macromolecules版 - 请教ATRP How many monomers can be polymerized to 100K?
Can it be an interesting research topic to increase the MW limit of ATRP?
I regularly finger through Macromolecules website---there are so many papers
dealing with controlled radical polymerizations. |
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w********h
发帖数: 12367 | 33 for transformational research on nanowires, nanomaterials, and their
applications "
CHARLES M. LIEBER , Mark Hyman, Jr., Professor of Chemistry, Department of
Chemistry and Chemical Biology, Harvard University, Cambridge, MA USA , 2001
Feynman Prize in Nanotechnology • The 2003 World Technology Summit &
Awards
SCIENCEWATCH | HIGHLYCITED.COM
"for his development of atom transfer radical polymerization (ATRP) and
other methods of 'living' polymerization "
KRZYSZTOF (KRIS) MATYJASZEWSKI , J.C |
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d****n
发帖数: 237 | 34 1 Highly Active Copper-Based Catalyst for Atom Transfer Radical
Polymerization. Journal of the American Chemical Society, 2006, 128, (50),
16277-16285.
2 CuBr2/N,N,N',N'-tetra[(2-pyridal)methyl] Ethylenediamine/Tertiary Amine
as a Highly Active and Versatile Catalyst for Atom-Transfer Radical
Polymerization via Activator Generated by Electron Transfer. Macromolecular
Rapid Communications, 2006, 27, (14), 1127-1131.
若方便，请发送至z*****[email protected]！
向通讯作者发邮件求文章，被其藐视。悲从中来！
多谢！ |
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r******0
发帖数: 2753 | 35 2.
difference between radical polymerization &and condensation polymerization. |
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d**a
发帖数: 3715 | 36 谢谢， 所以你们认为Flory的理论只在讨论 step polymerize的时候才有用。 在
radical polymerize 的时候讨论没有意义？
以上三位各得一小包子。 |
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r******0
发帖数: 2753 | 37 Flory had covered gelation of radical polymerization, but it is different to
step polymerization model. |
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a********c
发帖数: 60 | 38 说得都有点道理。活性阳离子的确与ATRP有点象，但只不过是“有点”。 ATRP is
definitely a stand-alone invention, and Wang discovered the system leading
to a hot field in polymer chemistry as we know today. 要说想法idea， living
polymerization is not new. Swarc really deserved the ownership of living
polymn.因此，1994 年前， 大家都在同一个认识水平。是王的ATRP指出了实现 living
radical polymerization 的路子 |
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k*******n
发帖数: 2399 | 39 为什么用引发剂不同就不是emulsion polymerization了？是不是emulsion
polymerization应该是由反应体系本身决定的吧？不同的是我用了SWNT/SiO2
nanoparticle作为emulsion stablizer。 体系见Http://pubs.acs.org/doi/abs/10.1021/la901380b。我目的是为了用这个emulsion system可以不需要加入表面活性剂直接制备sphere-size的CNT/Polymer composites。在解释的时候，比较迷惑的是为什么particle加入多会导致styrene conversion速率降低。 |
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d**a
发帖数: 3715 | 40 Update:
Reaction 1: polymerize styrene
After removing the inhibitor originally in styrene by passing a
chromatographic column, 5 gram of styrene were mixed with 1 mol % of AIBN in
5 mL of anhydrous THF. The reaction solution was then stirred overnight at
80 oC with a gentle nitrogen purge. In the next morning, all the THF was
found to be blew off and the entire styrene was polymerized to form one
piece of rigid clear material, which was then dissolved in hot toluene and
precipitate in cold met |
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m*****e
发帖数: 1506 | 41 The easy way is to polymerize F-containing vinyl monomers from an OH-
functionalized initiator by ATRP, or from an OH-containing transfer agent by
RAFT.
Anionic polymerization followed by end capping with epoxide is the most
efficient way.
ROP of cyclic ester is also a common way to introduce OH- chain end, but you
need to synthesize F-containing monomer |
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a****d
发帖数: 524 | 42 If you polymerized in bulk and could not precipitate in water/MeoH, then
try Hexane, sometime if it is even a liquid precipitation and you have to
stir it and suck the PU using pepit,
If you polymerized in solvent,concentrated until it is oily feel and then
precipitate should be fine |
|
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p******s
发帖数: 193 | 44 【 以下文字转载自 Chemistry 讨论区 】
发信人: pastoris (锦涛喇嘛), 信区: Chemistry
标 题: 求指教一个纳米fe3o4@sio2@pmma合成中，pmma的聚合条件
发信站: BBS 未名空间站 (Tue Apr 22 10:27:16 2014, 美东)
想照着2009年邓春晖Angew chemie的Fe3O4@SiO2@PMMA 的文章，做这个东西，用来接功
能蛋白
大家看看，最后的聚合不需要引发剂么？
前文不赘述了，Fe3O4@SiO2-MPS 已经合成好了
要往上面修饰PMMA了，
The sandwich structured Fe3O4@SiO2@PMMA microspheres were synthesized via an
aqueous-phase radical polymerization. Typically, in a three-necked round
bottom flask (100 mL) equipped with a mechanical stirrer, a refluxing
conden... 阅读全帖 |
|
w********h
发帖数: 12367 | 45 Rank Full Journal Title Journal Impact Factor
1 PROGRESS IN POLYMER SCIENCE 26.854
2 BIOMATERIALS 8.312
3 Journal of Biomedical Nanotechnology 7.578
4 Polymer Reviews 6.593
5 MACROMOLECULES 5.927
6 BIOMACROMOLECULES 5.788
7 Acta Biomaterialia 5.684
8 Polymer Chemistry 5.368
9 ACS Macro Letters 5.242
10 JOURNAL OF MEMBRANE SCIENCE 4.908
11 EUROPEAN CELLS & MATERIALS 4.887
12 Advanced Healthcare Materials 4.880
13 MAC... 阅读全帖 |
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P******e
发帖数: 129 | 46 公司招几个实习生，要求至少有2年高分子合成经验的，特别是做过control radical
polymerization和Ionic polymerization的, 特别是合成过functional polymers和
block copolymers优先。有意请私信 |
|
B*****n
发帖数: 654 | 47 来自主题: Macromolecules版 - 求工作推荐 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 |
|
发帖数: 1 | 48 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.
关键词：computational fluid and solid dynamics, fluid-solid interactions,
polymeric materials, numerical and analytical models, material reliability
and characterization, moisture-induced failures, vibration and noise,
microelectronics
相关领域都可以，希望最近有要出paper的版上朋友帮助。
真心请路过 的朋友帮忙引 用文章，本人感激不尽，到时定当答谢，具体可以msg我或
者邮件给... 阅读全帖 |
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l*********p
发帖数: 197 | 49 Use two photon absorption process to polymerize.
Usually the photoinitiator absorbs two photons to split into radicals, those
radicals start the polymerization process. |
|
s**********8
发帖数: 25265 | 50 Sterilization (microbiology)
http://en.wikipedia.org/wiki/Sterilization_(microbiology)
From Wikipedia, the free encyclopediaJump to: navigation, search This
article has multiple issues. Please help improve it or discuss these issues
on the talk page.
It may need reorganization to meet Wikipedia's quality standards. Tagged
since March 2008.
It is in need of attention from an expert on the subject. WikiProject
Microbiology may be able to help recruit one. Tagged since December 2010.
Contents [hide... 阅读全帖 |
|
