用两步溶液聚合法合成了硬段含量不同的一系列热塑性嵌段聚脲.研究了影响反应的各种因素.所得聚脲是线性和无定形的.用DSC和DMS法初步研究了这些聚脲的性质,随硬段含量增加.聚脲从软弹性体转变为高模量的硬塑料. A series of thermoplastic block polyureas with different hard segments were synthesized by two-step solution polymerization.The various factors that affect the reaction were investigated.The polyureas obtained were linear and amorphous.The poly The nature of the urea, with increasing hard segment content, changes from soft elastomers to high-modulus hard plastics.