Vinylbenzyl-Type Polyamide Macromer Synthesized from Bicyclic Oxalactam. Preparation and Characterization of Graft Copolymer Composed of Polystyrene as a Stock and Hydrophilic Polyamide as Branches
Vinylbenzyl-Type Polyamide Macromer Synthesized from Bicyclic Oxalactam. Preparation and Characterization of Graft Copolymer Composed of Polystyrene as a Stock and Hydrophilic Polyamide as Branches
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由双环草内酰胺合成的乙烯基苄基型聚酰胺大分子单体。
DOI：
10.1295/polymj.17.1045
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发表时间：
1985
期刊：
影响因子：
--
通讯作者：
M. Kawasumi
中科院分区：
文献类型：
--
作者：
K. Hashimoto;H. Sumitomo;M. Kawasumi
通过双环草内酰胺、8-氧杂-6-氮杂双环[3.2.1]辛烷-7-酮（缩写为BOL，2）的阴离子开环聚合，然后与对乙烯基苄胺反应，制备了不同平均分子量（Mn；3900、5400和8400）的乙烯基苄基型聚酰胺大分子单体（1）。从单体反应性倒数比(1/r2)的估计，发现大分子单体(M1)在与苯乙烯(M2)的自由基共聚中的相对反应性低于对甲基苯乙烯。通过结构分析、溶解度测试和吸湿性测定对所得由聚苯乙烯原料和聚酰胺支链组成的接枝共聚物进行了表征。两种透明二元共混薄膜，即i)接枝共聚物和均聚苯乙烯和ii)接枝共聚物和聚BOL，分别由相应的氯仿和氯仿-甲醇(9:1)溶液浇铸在玻璃板上。在主要包含聚苯乙烯的前一种膜的情况下，根据接触角测量和衰减全反射红外光谱发现，作为真正次要组分的接枝共聚物的亲水性聚酰胺链段位于玻璃侧表面上。
Vinylbenzyl-type polyamide macromers (1) of various average molecular weights (Mn; 3900, 5400, and 8400) were prepared by the anionic ring-opening polymerization of a bicyclic oxalactam, 8-oxa-6-azabicyclo[3.2.1]octan-7-one (abbreviated as BOL, 2) followed by a reaction with p-vinylbenzylamine. The relative reactivity of the macromer (M1) in the radical copolymerization with styrene (M2) was found to be lower than that of p-methylstyrene from the estimation of the reciprocal monomer reactivity ratio (1/r2). The resulting graft copolymer composed of a polystyrene stock and polyamide branches was characterized by structural analysis, solubility test, and determination of moisture sorption. Two kinds of transparent binary blend films, which were i) the graft copolymer and homopolystyrene and ii) the graft copolymer and polyBOL, were cast on a glass plate from the corresponding chloroform and chloroform-methanol (9:1) solutions, respectively. In the case of the former film comprising mainly polystyrene, the hydrophilic polyamide segment of the graft copolymer as a really minor component was found to be located on the glass-side surface from the contact angle measurement and the attenuated total reflection-infrared spectroscopy.