摘要
以膦腈碱(t-BuP4)为催化剂催化了己内酯(CL)和N-苯基马来酰亚胺(NPMI)的杂化共聚反应.用核磁(1H-NMR)、红外光谱(FTIR)、凝胶渗透色谱(GPC)和热失重(TGA)对聚合物及聚合反应过程进行了表征.结果表明,t-BuP4能成功催化CL和NPMI的杂化共聚,合成具有CL和NPMI两种结构单元的共聚物.聚合反应过程中NPMI以打开双键的方式进入聚合物.聚合物中己内酯结构单元的含量随CL和NPMI单体摩尔比的增加而增加,但其含量始终小于NPMI结构单元的含量.合成共聚物的热稳定性介于己内酯和N-苯基马来酰亚胺均聚物之间.
The hybrid copolymerization of ε-caprolactone（CL） and N-phenylmaleirnide with 1-tert-butyl-4,4,4-tris（dimethylamino）-2,2-bis[tris（dimethylamino）-phosphoranylidenamino]-2Λ5,4Λ5-catenadi（phosphazene） （t-BuP4） as catalyst was presented.The reaction process and the structure of the polymers have been characterized by nuclear magnetic resonance spectroscopy（NMR）,Fourier transform infrared spectroscopy （FTIR）,gel permeation chromatography（GPC） and themogravimetric analysis（TGA）.The results show that NPMI incorporated into the copolymers via the breakage of vinyl bonds,and t-BuP4 displays high catalytic activity for the hybrid polymerization of CL with NPMI.The resulted polymers were copolymers but not the mixture of CL and NPMI homopolymers.Studying the effect of polymerization conditions including CL to NPMI ratios and temperatures shows that the molar ratio of CL units in the copolymer increased with the increasing of CL monomers,but that was no more than 38.4%.Increasing the reaction temperature from 0 ℃ to 50 ℃,the composition and the molecular weight of the resulted copolymers have a slight change.TGA measurements demonstrate that such a random copolymer exhibits a decomposition temperature between that of either homopolymer.
出处
《高分子学报》
SCIE
CAS
CSCD
北大核心
2014年第3期356-360,共5页
Acta Polymerica Sinica
基金
国家自然科学青年基金项目(项目号21304010)
江苏省自然科学青年基金项目(项目号BK20130246)
常州大学科技创新基金项目(基金号ZMF13020026)资助
