FORMATION MECHANISM OF SIMULTANEOUS INTERPENETRATING POLYMER NETWORKS FROM CASTOR OIL POLYURETHANE AND VINYL COPOLYMERS AND STUDY OF THEIR DYNAMICAL PROPERTIES
蓖麻油聚氨酯和乙烯类聚合物互穿网络材料的生成特点及其动态力学性能

Study of the formation kinetics of the simultaneous interpenetrating polymer network (IP-N) at room temperature indicated that castor oil not only reacts with TDI in the formation of polyurethane network, but also takes part in the formation of vinyl copolymer chain. The 1PN obtained is rather a grafted semi-IPN than a semi-IPN. Dynamic mechanical sludy of the IPN's showed two Tg's for the IPN containing polystyrene or polymethyl methacrylate but only one Tg for the IPN contatining only polyacrylonitrile, indicating more molecular mixing in the latter IPN.