Synthesis of Asymmetric Star-Branched Polymers Having Two Polyacetylene Arms by Means of Living Anionic Polymerization Using 1,1-Diphenylethylene Derivatives
Synthesis of Asymmetric Star-Branched Polymers Having Two Polyacetylene Arms by Means of Living Anionic Polymerization Using 1,1-Diphenylethylene Derivatives
复制标题
DOI：
10.1021/ma061261h
复制
发表时间：
2007
期刊：
影响因子：
5.5
通讯作者：
Youliang Zhao;Tomoya Higashihara;A. .. Sugiyama;A. Hirao
中科院分区：
文献类型：
--
作者：
Youliang Zhao;Tomoya Higashihara;A. .. Sugiyama;A. Hirao
利用活性阴离子聚合物和3,5-双(3-(4-(1-苯基乙烯基)苯基)丙氧基)苄基溴合成了两个系列的新型3臂AE2、4臂ABE2、5臂ABCE2和5臂AD2E2、6臂ABD2E2、7臂ABCD2E2不对称星形支化聚合物。 A、B、C、D和E臂是聚苯乙烯(A)、聚(α-甲基苯乙烯)(B)、聚(4-甲氧基苯乙烯)(C)、聚(4-三甲基甲硅烷基苯乙烯)(D)和聚(4-甲基苯基乙烯基亚砜)(E)链段。该方法涉及仲丁基锂或聚（4-三甲基甲硅烷基苯乙烯基）锂与两种1,1-二苯基乙烯（DPE）链官能化聚合物的加成反应，以及随后由加成反应产生的两个1,1-二苯基烷基阴离子引发的4-甲基苯基乙烯基亚砜的原位活性阴离子聚合。本文使用的三种 DPE 官能化聚合物是链端官能化聚苯乙烯、链内官能化 AB 二嵌段共聚物和在链端、连接处具有两个 DPE 部分的核官能化 3 臂 ABC 星形支化聚合物。
Two series of new 3-arm AE2, 4-arm ABE2, 5-arm ABCE2, and 5-arm AD2E2, 6-arm ABD2E2, 7-arm ABCD2E2 asymmetric star-branched polymers have been synthesized using living anionic polymers and 3,5-bis(3-(4-(1-phenylethenyl)phenyl)propoxy)benzyl bromide. The A, B, C, D, and E arms were polystyrene (A), poly(α-methylstyrene) (B), poly(4-methoxystyrene) (C), poly(4-trimethylsilylstyrene) (D), and poly(4-methylphenylvinyl sulfoxide) (E) segments. The methodology involves an addition reaction of either sec-BuLi or poly(4-trimethylsilylstyryl)lithium with two 1,1-diphenylethylene (DPE)-chain-functionalized polymers and a subsequent living anionic polymerization of 4-methylphenylvinyl sulfoxide in situ initiated with the two 1,1-diphenylalkyl anions generated by the addition reaction. Three DPE-functionalized polymers herein used were chain-end-functionalized polystyrene, in-chain-functionalized AB diblock copolymer, and core-functionalized 3-arm ABC star-branched polymer with two DPE moieties at chain end, junction...