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首页> 外文期刊>Chemistry: A European journal >Synthesis of alternating polystyrene/poly(ethyleneoxide) branched polymacromonomers
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Synthesis of alternating polystyrene/poly(ethyleneoxide) branched polymacromonomers

机译：交替聚苯乙烯/聚环氧乙烷支化的大分子单体的合成

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摘要

Newly designed PS/PEO alternating branched polymacromonomers have been obtained by polycondensation of #alpha#-dicarboxy-functionalized polystyrene and #alpha#-dihydroxy-functionalized polyethyleneoxide, 4-[3,5-Bis-(methoxycarbonyl)phenoxymethyl]benzyl bromide was used as atom-tranfer radical polymerization (ATRP) initiator for the synthesis of #alpha#-dicrboxy functionalized polystyrenes. These macromonomers possess low polydispersities and molecular weights in the range of 7000 to 100000, as proved by gel permeation, chromatography (GPC) and ~1H NMR, #alpha#-Dihycdroxy functionalized polyethyleneoxide (PEO) was synthesized by treatment of monofunctionalized PEO with 3,5-bis(benzyloxy)benzoyl chloride. Polycondensation of the #alpha#-dicarboxy PS with the #alpha#-dihydroxy PEO in solution or in bulk resulted in alternating PS/PEO polymacromonomers, which were effectively purified from the unreacted macromonomers and characterized by using ~1H NMR, GPC, thermal analysis, and optical microscopy. Light-scattering measurements in organic solvents like THF or dioxane have shown that these polymacromonomers form stable micelles.
机译：通过＃α＃-二羧基官能化的聚苯乙烯与＃α＃-二羟基官能化的聚环氧乙烷的缩聚反应，获得了新设计的PS / PEO交替支化的大分子单体，使用了4- [3,5-双-（甲氧基羰基）苯氧基甲基]苄基溴用作原子转移自由基聚合（ATRP）引发剂，用于合成＃alpha＃-二苯氧基官能化聚苯乙烯。这些大分子单体具有低多分散性，分子量在7000至100000之间，通过凝胶渗透，色谱法（GPC）和〜1H NMR证明，通过用3处理单官能化的PEO合成了＃α＃-二乙氧基官能化的聚环氧乙烷（PEO）。 ，5-双（苄氧基）苯甲酰氯。溶液中或本体中＃alpha＃-二羧基PS与＃alpha＃-二羟基PEO的缩聚反应导致PS / PEO交替的大分子单体，可有效地从未反应的大分子单体中纯化出来，并通过〜1H NMR，GPC，热分析进行表征，以及光学显微镜。在有机溶剂（如THF或二恶烷）中进行的光散射测量表明，这些聚大分子单体形成稳定的胶束。

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