Studies on Interpenetrating Polymer Networks of Polyurethane/Polystyrene

Abstract

Abstract: A series of interpenetrating polymer networks of polyurethane/polystyrene (PU/PSt-IPN) were synthesized by a simultaneous method. The. molecular weight,glass transition temperature and mechanical properties of the system were investigated by GPC, DSC and Instron Tester. The results show that the molecular weight of PSt decreases and its distribution becomes wider with increasing the ratio of PU in the system. During polymerization, the faster the molecular weight of the polymer in IPNincreases,the earlier the phase separation of the system occurs. PU/PSt-IPN is an incompatible system. There are two T_g's corresponding to the T_g's of the respective component polymers. The stiffness of the IPN increases with enhancing. DVB content and NCO/OH ratio or PSt ratio. The strain inbreak of the IPNis the largest at the composition ratio of 75/25.

Key words: Polyurethane, Polystyrene, Interpenetrating polymer networks

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Xue Shuchang, Zhang Zhiping, Ying Shengkang . Studies on Interpenetrating Polymer Networks of Polyurethane/Polystyrene[J]. Chem. J. Chinese Universities, 1990, 11(9): 1040.

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Studies on Interpenetrating Polymer Networks of Polyurethane/Polystyrene

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