应用化学 ›› 1998, Vol. 0 ›› Issue (4): 77-79.

• 研究论文 • 上一篇    下一篇

含螺环原碳酸酯的预聚物对环氧树脂的改性研究

王长松, 周本濂   

  1. 中国科学院金属研究所 沈阳 110015
  • 收稿日期:1997-10-16 修回日期:1998-03-16 出版日期:1998-08-10 发布日期:1998-08-10

Study on Epoxy Resin with Modified Prepolymer Containing Spiro-orthocarbonate

Wang Changsong, Zhou Benlian   

  1. Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110015
  • Received:1997-10-16 Revised:1998-03-16 Published:1998-08-10 Online:1998-08-10

摘要: Bailey发现螺环原酸酯和螺环原碳酸酯等单体在阳离子引发剂作用下进行双开环聚合反应时,伴随着体积膨胀[1].这一现象引起了高分子材料学家的极大兴趣,因为树脂固化时产生体积收缩,会使树脂材料内部产生收缩应力,是导致材料力学性能下降,使用寿命降低的主要 原因之一例如,用不饱和螺环原碳酸酯改性的某种补牙材料与牙的粘接力比不含螺环原碳酸酯的大一倍,并且改善了冲击强度而不改变模量.更为重要的是,由于体积稍微膨胀,补牙材料与牙齿间无缝隙,从而消除了在缝隙中繁殖细菌的可能性,达到既结实又卫生的目的[2].

关键词: 环氧树脂改性, 螺环原碳酸酯预聚物, 粘接强度, 热稳定性

Abstract: The epoxy resin E-51 has been modified with a new prepolymer containing spiroorthocarbonate.It is found that the addition of the prepolymer into epoxy resin system enhances the conversion of epoxy groups with the Tg and thermal stability of the matrix beingslightly reduced.The adhesive tensile and shear strengths of the modified resin increased obviousely with the increase in prepolymer content.The relationship between the shrinkageand adhesive strengths of the products also has been investigated.

Key words: epoxy resin modification, spiro-orthocarbonate prepolymer, adhesive strength, thermal stability