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In this paper, by studying the effect of emulsifying condition on the intrinsic viscosity of polyurethane, it was proved that, when the terminal-NCO g ...展开
roups of polyurethane prepolymer reacted with water, the molecular chain of polyurethane was extended and molecular weight improved. On the base of the syudy, in terms of FT-IR、′HNMR, EPA and other analytic methods. The reaction between siloxane crosslinking agent and polyurethane prepolymer was studied，and it was also studied that the effect of siloxane crosslinking agent ended the terminal-NCO group on the character of polyurethane film. 收起
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