遥爪型液体聚合物及其多相共聚物——Ⅷ.端羧基乙烯基四氢呋喃-环氧丙烷液体聚合物与甲基丙烯酸缩水甘油酯的交联

本文研究了端羧基乙烯基四氢呋喃-环氧丙烷液体共聚物(TVC-PTP)与甲基丙烯酸缩水甘油酯(GMA)的反应。观察了组成比,催化剂等对反应产物力学性能的影响。用红外光谱跟踪了这一反应过程,观察了乙烯基和环氧基的消失速度。用平衡溶胀法测定了交联聚合物单位体积内有效交联链的数目和交联点间平均分子量,观察了它们对交联聚合物力学性能的影响。

LIQUID TELECHELIC POLYMER AND ITS MULTIPHASE COPOLYMERS THE CROSSLINKING REACTION OF LIQUID VINYL-CARBOXYL TERMINATED TETRAHYDROFURAN-PROPYLENE OXIDE COPOLYMER WITH GLYCIDYL METHACRYLATE

The crosslinking reaction of vinyl-carboxyl terminated tetrafuranpropylene oxide copolymer with glycidyl methacrylate has been investigated. The effects of component ratio and catalyst on the mechanical properties of the product were observed. The changes of vinyl groups and epoxy groups were followed by IR spectrum measuvement during the reaction process. The result indicates that the reaction of epoxy and carboxyl groups proceeds more difficultly than the addition reaction of vinyl groups.It is considered very important to choose an efficient catalyst to control the relative reaction rates and conversion degree of the two reactions. The number of the effective crosslinking chains per unit volume (V_o) and the average moecular weight between crosslinks (M_c) were determined by means of equilibrium swelling technique. The mechanical properties were improved with increase of crosslinking density. V., M_c and mechanical properties were influenced by the content of the catalyst used.