摘要
在添加一定浓度的CuX(X=C l/B r)/五甲基二亚乙基三胺(PMDETA)后,甲基丙烯酸N,N-二甲氨基乙酯(DMAEMA)于室温下只需暴露于空气中即可聚合形成PDMAEMA.通过一系列对比试验验证了该过程的催化氧化聚合特征,通过改变催化剂浓度与反应温度等反应条件,利用气相色谱、核磁共振和凝胶渗透色谱研究了该聚合过程的动力学和所得PDMAEMA的结构.结果表明,单体转化率与所得聚合物分子量均随反应时间的延长而逐渐增加,过高或者过低浓度的CuX/PMDETA均无法催化该聚合过程,所得聚合物具有与普通线型PDMAEMA类似的化学结构.我们提出了一个假设性的机理以解释此现象.
It was observed that upon addition a certain amount of CuX(X = Cl/Br)/pentamethyldiethylenetriamire(PMDETA) in the presence of air,(N,N-dimethylamino)ethyl methacrylate(DMAEMA) can steadily undergo catalytic oxidative polymerization at ambient temperature.The results from gas chromatography(GC),nuclear magnetic resonnance spectroscopy(()~1H-NMR) and gel-permeation chromatography(GPC) showed that both the monomer conversion and the number-average molecular weight increased gradually with the reaction time;the as-prepared PDMAEMA had a structure silimar with that prepared via conventional radical polymerization.A mechanism was proposed to rationalize the above findings.
出处
《高分子学报》
SCIE
CAS
CSCD
北大核心
2010年第2期185-191,共7页
Acta Polymerica Sinica
基金
国家自然科学基金(基金号20674033)
江苏省自然科学基金(基金号BK2008142)
教育部留学回国人员科研启动基金资助项目