Studies on Polyepichlorohydrin-Based Polyurethane/ Poly(MMA-co-St)IPNs

Abstract

Abstract: Interpenetrating polymer networks of polyepichlorohydrin-based polyurethane/ploy(MMA-co-St)have been prepared with simultaneous method by changing the weight fraction of MMA(W_MMA)in copolymer of MMA with styrene. The IPNs have been studiedby DSC,TEM and dynamic mechanical spectroscopy(DMS).The results show that the IP-Ns have only one T_gwhen W_MMAis greater than 0.6 But when W_MMAis less than0.4, theIPNs have two T_gs, and phase separation is observed on TEM. The phenomenon is ex-plained according to the solubility parameters(δ)and the fraction of hydrogen bond(δ_h) of P(MMA-co-St).The study reveals that there is a close correlation among the δ,domain sizeand mechanical properties of PU(PECH)/P(MMA-co-St)IPN.

Key words: Interpenetrating polymer networkes, Polyurethane, Poly(MMA-co-St), T_g, Morphology

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CHEN Bao-Quan, HAN Xiao-Zu, GUO Feng-Chun . Studies on Polyepichlorohydrin-Based Polyurethane/ Poly(MMA-co-St)IPNs[J]. Chem. J. Chinese Universities, 1995, 16(10): 1637.

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Studies on Polyepichlorohydrin-Based Polyurethane/ Poly(MMA-co-St)IPNs

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