摘要
本文测定了0—130℃温度范围内,由^(60)Co-γ射线和两种活性不同的引发剂引发聚合的聚甲基丙烯酸三丁基锡酯的等规度。利用^(13)C-NMR测定聚合物分子链的等规度,如预料的那样,以间同立构为主,并随着聚合温度的升高间同立构等规度降低。作者认为影响聚合物等规度的因素主要是取代基的极性效应。计算出的控制等规度的活化能参数与聚甲基丙烯酸甲酯和聚甲基丙烯酸三甲基锡酯的属同一数量级,可相互比较。
A series of poly(tri-n-butyl tin methacrylate) samples have been synthesized in the range of 0° to 130℃ by the radiation initiation and in the higher temperature using initiators. The tacticity of the polymers has been measured by 13C-NMR. The results show that the polymers are all predominantly syndiotactic, as expected, and the tendency to form syndiotactic sequences decreases as the polymerization temperature increases. The tacticity of polymers is mainly influenced by the polarity of substituent group of vinyl monomer. The activation parameters governing the tacticity are similar to those of poly(methyl methacrylate), but smaller than those of poly (trimethyl tin methacrylate).
出处
《高分子学报》
SCIE
CAS
CSCD
北大核心
1989年第5期600-605,共6页
Acta Polymerica Sinica
基金
国家自然科学基金资助课题
关键词
有机锡聚合物
等规度
防污涂料
Tacticity, Activation parameters, Poly(tributyl tin methacrylate), 13C-NMR
