Epoxy/poly(4-vinylphenol) blends crosslinked by imidazole initiation

被引：12
|
作者：
Prolongo, Silvia G.
Prolongo, Margarita G. [1 ]
机构：
[1] Univ Rey Juan Carlos, Dpt Ciencia & Ingn Mat, ESCET, Madrid, Spain
[2] Univ Politecn Madrid, Dpt Mat & Prod Aweoespacial, ETSI Aeronaut, Madrid, Spain
来源：
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY | 2007年 / 87卷 / 01期
关键词：
curing; epoxy blend; imidazole; poly(4-vinylphenol);
D O I：
10.1007/s10973-006-7803-z
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
Poly(4-vinylphenol) (PVPh) was used as thermoplastic modifier of epoxy resins. Binary epoxy/PVPh mixtures with high thermoplastic content rise high glass transition temperatures (T-g) after heating, due to the epoxy-phenol reaction. Blends with low PVPh percentages reach high T-g if 2-methylimidazole is added, which catalyses epoxy homopolymerisation and epoxy-phenol reaction. The cured blends do not present phase separation although the network structure depends on the epoxy/phenol ratio. At low PVPh percentage the main crosslinking reaction is epoxy-epoxy but, when the thermoplastic content increases, the epoxy-phenol reaction prevails, causing an important T (g) increase and becoming less brittle.
引用
收藏
页码：259 / 268
页数：10
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