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世界*實(shí)驗(yàn)材料供應(yīng)商 polymer source 正式授權(quán)上海起發(fā)為其中國(guó)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(wù),上海起發(fā)一直秉承為中國(guó)科研客戶帶來(lái)的產(chǎn)品，的服務(wù)，簽約 polymer source 就是為了給廣大科研客戶帶來(lái)更加完善的產(chǎn)品和服務(wù),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(zhì)量建筑控制專業(yè)級(jí)的聚合物和生物聚合物的研究產(chǎn)品供應(yīng)商。polymersource的研究團(tuán)隊(duì)包括動(dòng)態(tài)，主管和創(chuàng)新的科學(xué)家，在各種學(xué)術(shù)和研究機(jī)構(gòu)提供*的服務(wù)。
polymersource的科學(xué)家已經(jīng)完成了生產(chǎn)3000多嵌段共聚物，產(chǎn)品質(zhì)量得到了*的認(rèn)可。除了提供生物/聚合物，聚合物源已經(jīng)開(kāi)發(fā)了基于我們的產(chǎn)品的合成和應(yīng)用知識(shí)產(chǎn)權(quán)。
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 10oC/min.The midpoint of the slope change of the heat flow plot of the second heating scan was considered as the glass transition temperature (Tg).
The melting temperature (Tm) 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(hào) | 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(yīng)
我們公司zui大優(yōu)勢(shì)是強(qiáng)大的采購(gòu)，
1：基本什么都能進(jìn)口，血清，抗體，耗材，還有部分限制進(jìn)口的，
2：貨品全，現(xiàn)經(jīng)營(yíng)過(guò)700多個(gè)品牌，基本所有生物試劑耗材都可以進(jìn)口，特別是冷偏的產(chǎn)品那就更有優(yōu)勢(shì)，
3：提供加急服務(wù)，一般1-2周到貨，超過(guò)時(shí)限加急費(fèi)全免
4：價(jià)格公道，絕大部分價(jià)格有優(yōu)勢(shì)，當(dāng)然不能保證100%產(chǎn)品都是,因?yàn)橐馕吨鴽](méi)有服務(wù).
5：良好的信譽(yù)，大部分客戶我們提供貨到付款服務(wù)，客戶包括清華，北大 交大 復(fù)旦，中山等100多所大學(xué)，ROCHE，阿斯利康，國(guó)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。
