¹H spin-diffusion solid-state NMR, in combination with other techniques, was utilized to investigate the effect of molecular architecture, solubility parameter of hard and soft segments, and their length on the domain size, interphase thickness and degree of phase separation in polyurethane-ureas based on oligomeric 4,4′-diisicyanate diphenylmethane, methylene-bis-(2-chloroaniline) and polyols based on polyethylene oxide, polypropylene oxide and polybutadiene with different length. Polyurethane-ureas based on polyethylene oxide soft blocks did not form rigid domains as a result of absence of microphase separation. The domain sizes of the hard segments in polyurethane-ureas under study practically did not show any dependence on their composition, but interphase thicknesses are higher for systems based on polybutadiene soft blocks. This indicates that the degree of phase separation depends strongly not only on the binary thermodynamic interaction between hard and soft segments in polyurethane-ureas, but is also influenced by their molecular architectures in the experimental temperature range.

^1个利用H自旋扩散固态NMR与其他技术结合，研究了分子结构，硬链段和软链段的溶解度参数及其长度对聚氨酯中畴尺寸，相间厚度和相分离度的影响-基于4,4'-二异氰酸酯低聚二苯甲烷的低聚脲，亚甲基双-（2-氯苯胺）和基于聚环氧乙烷，聚环氧丙烷和聚丁二烯的不同长度的多元醇。由于没有微相分离，基于聚环氧乙烷软嵌段的聚氨酯-脲没有形成刚性区域。实际上，正在研究的聚氨酯-脲中硬链段的畴尺寸几乎没有显示出对其组成的任何依赖性，但是对于基于聚丁二烯软嵌段的体系，相间厚度更高。