摘要
用IR、DSC等分析方法研究了端2-(口恶)唑啉聚环氧丙烷(活性聚醚)与环氧树脂的固化反应,对固化机理作了讨论。并考察了不同分子量活性聚醚对环氧树脂的增韧作用。结果表明,此活性聚醚对环氧树脂增韧效果明显,固化树脂综合性能较好。
The curing reaction of epoxy resin with 2-oxazoline-terminated poly(propylene oxide) (active polyether) prepared by cyanoethylation and oxazoline. cyclization from hydroxy- terminated polyether is-studied by IRand DSC analysis. The apparent rate constants for different temperatures and apparent activation energy of the curing reaction are evaluated by DSC method. The mechanism of curing reaction is discussed. The physical :and mechanical .properties of cured epoxy system toughened by the active polyether with different molecular weights is estimated. The results show that via selecting the amount of polyether used and its MW, the cured systems may possess higher fracture toughness , while .retaining the valuable properties of the rigid system. The active polyether can be used as a kind of latent-curing and toughening agent for epoxy resin.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1990年第8期877-881,共5页
Chemical Journal of Chinese Universities
基金
江苏省科学技术委员会基金
关键词
环氧树脂
e唑啉聚醚
增韧作用
2-Oxazoline-terminated polyether, Epoxy resin, Toughening effect
