Synthesis and Properties of Periodic Copolymers

周期性共聚物的合成与性能

基本信息

批准号：
04650826
负责人：
YOKOTA Kenji
金额：
$ 0.96万
依托单位：
Nagoya Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1992
资助国家：
日本
起止时间：
1992 至 1993
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-04650826/
关键词：
periodic copolymer statistical copolymer constitutional repeating unit sequence glass transition temperature association crystallinity コポリマー Tg Tm 高分子錯体錯化平衝定数

项目摘要

Two types of periodic copolymers, i.e.alternating ethylene-acrylic copolymers and periodic ethylene-ethylene-acrylic copolymers, were synthesized by way of appropriate polymer reactions and identified. Acrylic monomers studied were methyl acrylate, methyl methacrylate, and methacrylonitrile. Corresponding statistical copolymers were also synthesized. The periodic copolymers and the statistical copolymers were studied with respect to their glass transition temperatures. The glass transition temperatures of periodic copolymers were identical or almost the same with those of statistical copolymers of the same composition. The same conclusion was obtained on the periodic and statistical ethylene-vinyl alcohol copolymers. Acidic polymers, i.e.poly(methacrylic acid), alternating ethylene-methacrylic acid copolymer, and periodic ethylene-ethylene-methacrylic acid copolymer were studied on their association in solution with basic poly(4-vinylpyridine). The association constant for the periodic copolymer was ca.1/100 of those of the other polyacids. The crystallinity of periodic ethylene-ethylene-methyl methacrylate copolymer was controlled by annealing and elongation. Film samples of from 0 to 60% crystallinity were obtained. Stress-strain curves of these samples were given.

通过适当的聚合物反应并鉴定出了两种类型的周期性共聚物，即甲烷 - 丙烯酸共聚物和周期性的乙烯 - 乙烯 - 丙烯酸共聚物，并通过适当的聚合物反应进行合成。研究的丙烯酸单体是丙烯酸甲酯，甲基丙烯酸甲酯和甲基丙烯腈。还合成了相应的统计共聚物。研究了周期性共聚物和统计共聚物的玻璃过渡温度。周期性共聚物的玻璃过渡温度与同一组成的统计共聚物的玻璃过渡温度相同或几乎相同。对周期和统计乙烯 - 乙烯基醇共聚物获得了相同的结论。酸性聚合物，即丙烯酸（甲基丙烯酸），交替的乙烯 - 甲基丙烯酸共聚物和周期性的乙烯 - 乙烯 - 甲基丙烯酸共聚物在溶液中与碱性聚（4-乙烯基吡啶）的结合进行了研究。周期性共聚物的缔合常数为其他多酸的Ca.1/100。通过退火和伸长来控制周期性乙烯 - 乙基 - 甲基甲基丙烯酸酯共聚物的结晶度。获得了0％至60％结晶度的膜样品。给出了这些样品的应力应变曲线。