Microphase separation and surface properties of segmented polyurethane - Effect of hard segment content
Microphase separation and surface properties of segmented polyurethane - Effect of hard segment content
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DOI：
10.1016/s0143-7496(96)00009-7
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发表时间：
1996-01-01
影响因子：
3.4
通讯作者：
Sudaryanto
中科院分区：
文献类型：
--
作者：
Nakamae, K;Nishino, T;Sudaryanto
合成了一系列以4,4'-二苯基甲烷二异氰酸酯和1,4-丁二醇为硬段（HS）、聚丙二醇（Mn=1000）为软段的嵌段聚氨酯（SPU）。通过热分析、X 射线衍射、接触角、化学分析电子能谱、T 剥离和拉伸测试测量来表征微相分离与表面和粘合性能之间的关系。当HS含量超过50wt%时，SPU发生微相分离，不仅影响整体性能，还影响表面性能。当HS含量超过50wt%时，SPU的杨氏模量和拉伸强度急剧增加。当 H2S 含量约为 50 wt% 时，表面自由能也以逐步方式增加。根据 T 剥离测试结果，SPU 的最佳粘合 HS 含量也具有良好的热性能和机械性能。
A series of segmented polyurethanes (SPU), based on 4,4'-diphenylmethane diisocyanate and 1,4-butanediol as hard segments (HS) and poly(propylene glycol) (Mn=1000) as soft segments, were synthesized. Relationships between microphase separation and the surface and adhesive properties were characterized by thermal analysis, X-ray diffraction, contact angle, electron spectroscopy for chemical analysis, T-peel and tensile test measurements. Microphase separation occurred for SPU with an HS content of more than 50 wt% and influenced not only the bulk properties, but also the surface properties. Young's modulus and tensile strength increased abruptly for SPU with an HS content of more than 50 wt%. Surface free energy also increased in a stepwise manner at an HS content of about 50 wt%. The optimum optimum HS content of SPUs for adhesion, based on T-peel test results, also gave good thermal and mechanical properties.