应用化学 ›› 1989, Vol. 0 ›› Issue (1): 17-21.

• 研究论文 • 上一篇    下一篇

AB交联聚合物的形态

刘景江, 刘文忠, 周华荣, 侯春荣   

  1. 中国科学院长春应用化学研究所
  • 收稿日期:1988-03-07 修回日期:1988-07-08 出版日期:1989-02-10 发布日期:1989-02-10
  • 基金资助:
    国家自然科学基金

MORPHOLOGICAL FEATURE OF AB CROSSLINKED POLYMERS

Liu Jingjiang, Liu Wenzhong, Zhou Huarong, Hou Chunrong   

  1. Changchun Institute of Applied Chemistry, Academia Sinica
  • Received:1988-03-07 Revised:1988-07-08 Published:1989-02-10 Online:1989-02-10

摘要: 以低分子量的端乙烯基聚氨酯预聚物同乙烯类单体共聚制得的AB交联聚合物(ABCP)呈现出两相形态结构,聚氨酯相形成分散相,塑料组份形成连续相。形态结构最显著特点是分散相区呈现出多分散性;其次,分散相区的形状不规则。这些特征不同于线型AB、ABA嵌段共聚物及A2B接枝共聚物,这是由于ABCP中,A和B两组份间存在着化学交联。交联密度,预聚物的分子量对两组份的相容性,形态结构有显著影响。

关键词: AB交联聚合物, 热固性聚合物, 形态, 聚氨酯

Abstract: AB crosslinked polymers (ABCP) were synthesized from low molecular weight vinyl-terminated polyurethane prepolymers and vinyl monomers such as styrene,methyl methacry-late, vinyl acetate, etc. ABCPs displayed a two-phased morphology with plastic compo-nents forming the continuous phase and PU-rich domains forming separation phase on theelectron micrographs. The irregular shapes and a highly polydisperse distribution of PU-rich domain size were observed. These morphological features of ABCPs were quite diffe-rent from linear AB and ABA block copolymers owing to the crosslinking between compo-ments A and B in ABCPs.The crosslinking density of ABCPs ahd molecular weight of pre-polymers showed a notable effect on the compatibility of two components and the mopho-1ogy of ABCPs as well.

Key words: AB crosslinked polymers, Thermosetting polymer, Morphology, Polyurethane