高等学校化学学报 ›› 1995, Vol. 16 ›› Issue (4): 653.

• 论文 • 上一篇    下一篇

交联密度对聚氨酯/聚苯乙烯互穿聚合物网络动态力学性能的影响

韩庆国, 王静媛, 刘瑞瑛, 李玉玮, 汤心颐   

  1. 吉林大学化学系, 长春, 130023
  • 收稿日期:1994-04-05 修回日期:1994-10-23 出版日期:1995-04-24 发布日期:1995-04-24
  • 通讯作者: 李玉玮
  • 作者简介:韩庆国,男,31岁,现在长春第一汽车集团公司工作.
  • 基金资助:

    国家自然科学基金

The Effect of Crosslinking Density on Dynamic Mechanical Properties of Polyurethane/Polystyrene Interpenetrating Polymer Networks

HAN Qing-Guo, WANG Jing-Yuan, LIU Rui-Ying, LI Yu-Wei, TANG Xin-Yi   

  1. Department of Chemistry, Jilin University, Changchun, 130023
  • Received:1994-04-05 Revised:1994-10-23 Online:1995-04-24 Published:1995-04-24

摘要: 采用同步法合成了聚氨酯/聚苯乙烯(PU/PS)互穿聚合物网络(IPN).通过改变NCO/OH比、三元醇/二元醇(3OH/2OH)比、异氰酸酯类型、多元醇分子量、二乙烯基苯含量及丙烯酸β-羟乙酯的含量,研究了单网及网间交联密度对PU/PSIPN动态力学性能影响的规律。结果表明:对相容性差的PU/PSIPN体系,采用增加交联密度、加快网络固化速度导致"强迫互容",能提高两网的互穿与缠结,增进组份的互容。但单网固化速度过快相容性反而下降。

关键词: 互穿聚合物网络, 聚氨酯, 聚苯乙烯, 动态力学性能

Abstract: In this paper polyurethane/polystyrene IPNs was synthesized by simultaneous synthesis method.The effects of crosslinking density of one and two netWorks on the dy namic mechanical properties were reported by variation of NCO/OH ratio,30H/2OHratio,the types of isocyanate,the molecular weight of polyethyl-glycol,(2-hydroxyethyl methacrylate and divinyl benzene,The results show that increasing crosslinking density and interpenetrating entanglement introduce"forced compatihility", so that it accelerates curing rate and decreases the phase separation. When the network curing rate is so fast,the compatibility of IPNs decrease for the incompatibility IPNs. One of the important factors of controlling IPNs phase separation is that the two networks cure simultaneously.

Key words: Interpenetrating polymer networks(IPN), Polyurethane, Polystyrene, Dynamic mechnical properties

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