摘要
本文对(蓖麻油-聚乙二醇)聚氨酯/聚甲基丙烯酸甲酯(PU/PMMA)互穿聚合物网络(IPN)体系进行了研究.实验结果表明:IPN的力学性能受网络化学构型控制.在PU/PMMA为25/75时,应力-应变曲线出现屈服点,产生类似皮革行为,并在此点抗张强度最高,表现明显的协同效应.动态力学性能及电镜均证明该体系相分离十分严重,通过加入扩链剂及网间交联剂能显著改善两组分相容性,其中网间交联剂效果最好。
In this article we determined the stress-strain, morphology and mechanical properties of interpenetrating polymer networks of PE-PU/PMMA. The effect of the crosslinking, chain extending and intercrosslinking agent and the compositional ratio of PE-PU/PMMA on the mechanical properties were invesitgated. The results show that the sample with the composition ratio of PE-PU/PMMA = 25/75 exhibits the highest mechanical properties which has a yield point and hehaves like leathery materials. The results of the dynamic mechnical properties and morphology show that a great phase separation occurs in this system. The compatibility of the two composition is remarkably improved by adding chain extending agent and intercrosslinking agent.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1991年第2期271-275,共5页
Chemical Journal of Chinese Universities
基金
国家自然科学基金
关键词
聚氨酯
PMMA
IPN
PU
聚酸酯
Interpenetrating polymer networks, Polyurethane, Polymethyl methacrylate
