世界*實驗材料供應商 polymer source 正式授權上海起發(fā)為其中國代理， polymer source 在一直是行業(yè)的*,一直為廣大科研客戶提供zui為的產(chǎn)品和服務,上海起發(fā)一直秉承為中國科研客戶帶來的產(chǎn)品，的服務，簽約 polymer source 就是為了給廣大科研客戶帶來更加完善的產(chǎn)品和服務,您的滿意將是我們zui大的收獲

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polymersource成立于1994年，是一家的高質量建筑控制專業(yè)級的聚合物和生物聚合物的研究產(chǎn)品供應商。polymersource的研究團隊包括動態(tài)，主管和創(chuàng)新的科學家，在各種學術和研究機構提供*的服務。

polymersource的科學家已經(jīng)完成了生產(chǎn)3000多嵌段共聚物，產(chǎn)品質量得到了*的認可。除了提供生物/聚合物，聚合物源已經(jīng)開發(fā)了基于我們的產(chǎn)品的合成和應用知識產(chǎn)權。

Sample Name: Poly(butadiene-b-ethylene oxide)

Sample #: P18952-BdEO

(poly butadiene block rich in 1,2-addition)

Structure of 1,2-rich microstructure:

Synthesis Procedure:

Poly(butadiene[1,4- or 1,2 addition]-b-ethylene oxide)

can be prepared by the different routes as reported in the literature (ref: Macromolecules 1996, 29, 6994).

The direct synthesis of diblock copolymer using lithium counter ion in the presence of phosphazene base t-BuP₄ is reported in Macromolecules 1999, 32 (8), 2783–785. The polymers can also be successfully synthesized using the different end-functionalized polymers as investigated in our lab. These methodologies are proprietary.

Characterization:

OH-terminated polybutadiene polymer was analyzed by size exclusion chromatography (SEC) to obtain the molecular weight and polydispersity index (PDI). The final block copolymer composition was calculated from ¹H-NMR spectroscopy by comparing the peak area of the vinylic butadiene protons between about 5.0-5.4 ppm with the ethylene oxide protons at 3.6 ppm. Block copolymer PDI is determined by SEC. Note: The ¹H-NMR of 1,2-polybutadiene is composed of 1 proton signal at 5.4 ppm and 2 proton signals at 5.0 ppm. Signals due to vinylic 1,4-polybutadiene are also present at 5.4 ppm.

Solubility:

Poly(butadiene-b-ethylene oxide) is soluble in THF, CHCl₃, and toluene. The polymer has variable solubility in hexane, methanol, ethanol and water depending on its composition.

DSC thermal analysis of P18952-BdEO:

Thermal analysis of the samples was carried out on a TA Q100 differential scanning calorimeter at a heating rate of 10^oC/min.The midpoint of the slope change of the heat flow plot of the second heating scan was considered as the glass transition temperature (T_g).

The melting temperature (T_m) was taken as the maximum of the endothermic peak where as the crystallization temperature (Tc) was considered as the minimum of the exothermic peak.

貨號	品名	規(guī)格	生產(chǎn)廠家
P18952-BdEO	Poly(butadiene(1,2 addition)-b-ethylene oxide)	2g	polymersource

P18952-BdEO現(xiàn)貨供應

我們公司zui大優(yōu)勢是強大的采購，

1：基本什么都能進口，血清，抗體，耗材，還有部分限制進口的，

2：貨品全，現(xiàn)經(jīng)營過700多個品牌，基本所有生物試劑耗材都可以進口，特別是冷偏的產(chǎn)品那就更有優(yōu)勢，

3：提供加急服務，一般1-2周到貨，超過時限加急費全免

4：價格公道，絕大部分價格有優(yōu)勢，當然不能保證100%產(chǎn)品都是,因為意味著沒有服務.

5：良好的信譽，大部分客戶我們提供貨到付款服務，客戶包括清華，北大 交大 復旦，中山等100多所大學，ROCHE，阿斯利康，國藥 ，fisher等500多家公司

6：我們*代理的品牌有：Antibody Research Corporation，arcticzymes，Biorelevant，AmberGen, Inc. ，clemente-associates，clodronaiposomes，Columbia Biosciences，enzyme research，Gene Bridges GmbH，Genovis，AmberGen, Inc.  Biotechnology GmbH，Haematologic Technologies HTI Haemtech，hookelabs，Immudex，Innovative Research of America，inspiralis ，List Biological Laboratories, Inc.，lumafluor，Microsurfaces，multiplicom，nanotools，Pel-Freez Biologicals，pentapharm，progen，Protein Ark，QA-Bio,Inc，QA-Bio,IncQuickZyme Biosciences，Teknova，TriLink BioTechnologies, Inc.，Zyagen Laboratories 等

7：我們還是invitrogen,qiagen,Midland BioProducts Corporationam,sigma;neb,roche,merck, rnd,BD, GE,pierce,BioLegend等知名*批發(fā)，歡迎合作。