中华医学超声杂志

应用化学 ›› 1996, Vol. 0 ›› Issue (5): 41-43.

• 研究论文 • 上一篇    下一篇

聚氨酯/聚(苯乙烯－甲基丙烯酸甲酯－甲基丙烯酸)互穿聚合物网络的研究

邢佩祥, 王静媛, 李玉玮, 杨松茹, 汤心颐   

  1. 吉林大学化学系 长春 130023
  • 收稿日期:1995-12-08 修回日期:1996-06-25 出版日期:1996-10-10 发布日期:1996-10-10
  • 基金资助:
    国家自然科学基金

Investigation on Polyurethane/Ploy(Styrene-Methyl Methacrylate-Methacrylic Acid) Interpenetrating Polymer Networks

Xing Peixiang, Wang Jingyuan, Li Yuwei, Yang Shongru, Tang Xinyi   

  1. Department of Chemistry, Jilin University, Changchun 130023
  • Received:1995-12-08 Revised:1996-06-25 Published:1996-10-10 Online:1996-10-10

PDF

376

被引次数

2

摘要： 研究了(蓖麻油-聚乙二醇)聚氨酯/聚(苯乙烯-甲基丙烯酸甲酯-甲基丙烯酸)(PU/P(St-MMA-MAA))互穿聚合物网络(IPN).动态力学性能及透射电镜结果均表明该体系相分离较严重.IPN具有两个玻璃化转变温度,它们有不同程度的内移,形成一定程度分子水平的混合,而IPN(50/50)其分子混合水平较大,互穿缠结程度较高。形成IPN后,其力学性能得以改善。透射电镜结果表明,聚氨酯网的交联密度直接影响IPN的相区尺寸。形成IPN后热稳定性提高,易于降解断链的St-MMA-MAA单体起到了自由基消除剂的作用。

关键词: 互穿聚合物网络, 动态力学谱, 聚氨酯, 相态

Abstract: A series of polyurethanes and poly(styrene-methyl methacrylate-methacrylic acid) interpenetrating polymer networks(IPNs) were characterized using stress-strain analysis,dynamic mechanical spectroscopy, transmission electron microscopy and thermal behavior measurements. The results of dynamic mechanical behavior and morphology show that the phase separation of the IPNs is serious.The IPNs have two Tg values with different extent of shift, indicating the mixing of two components in some extent. The formation of IPNs has improved their mechanical properties. It is suggested that the Si-MMA-MAA segments act as radical scavengers in the polyurethane degradation.

Key words: interpenetrating polymer network, dynamic mechanical spectrum, polyurethane, morphology

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