软段结构对聚酯型聚氨酯结晶性影响的研究  

STUDIES OF THE DAMPING NATERIALS BASED ON LATEXINTERPENETRATING POLYMER NETWORKS OF POLY(METHYL METHACRYLATE )ANE POLY(BUTYL ACRYLATE)

作　　者：朱永群[1] 黄亦军[1] 

机构地区：[1]杭州大学化学系

出　　处：《高分子材料科学与工程》1994年第3期80-83,共4页Polymer Materials Science & Engineering

摘　　要：用３种聚酯二醇ＰＥＡ、ＰＢＡ、ＰＨＡ和ＭＤＩ，以溶液聚合法合成了３个系列的线型嵌段聚氨酯胶粘剂（ＰＥＡＵ、ＰＢＡＵ、ＰＨＡＵ）。以Ｘ－Ｒａｙ衍射法测定了３种聚酯和３个系列聚氨酯的结晶度，讨论了聚酯类型、聚酯分子量、聚氨酯中硬段含量等因素对聚氨酯结晶能力的影响。结果表明，在硬段含量不高（＜２５％）情况下，聚氨酯中的结晶部分主要是由聚酯软段引起的，而聚酯结晶能力大小的次序为ＰＨＡ＞ＰＢＡ＞＞ＰＥＡ，增加聚酯软段的分子量，降低硬段含量均可以提高聚氨酯的结晶度，从而也明显提高了聚氨酯的粘接性能，尤其是初始粘接强度。A series of IPNs. including latex IPNs (i. e. LIPNs) of PMMA/PBA and P(MMA co PMA)/PBA, latex bidirectional IPNs (i. e. LBIPNs) of PMMA/PBA, and interfacial crosslinked LIPNs of PMMA/PBA, is synthesized in latex form. The results of dynamic mechanical spectroscopy and tensile strength measurement show. that (1) the compatibility and damping properties of LIPNs can be improved by the copolymerization of MMA with PMA, (2) bidirectional interpenetrating technique is an efficient method for improving the compatibility, and (3) ICLIPNs have good high temperature damping properly and anti creep property.

关 键 词：聚氨酯 X射线衍射 结晶 粘接 

分 类 号：O632.33[理学—高分子化学]