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首页> 外文期刊>Journal of Applied Polymer Science >Moisture-cured polyurethane/polysiloxane copolymers: Effects of the structure of polyester diol and NCO/OH ratio
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Moisture-cured polyurethane/polysiloxane copolymers: Effects of the structure of polyester diol and NCO/OH ratio

机译：湿固化聚氨酯/聚硅氧烷共聚物：聚酯二醇结构和NCO / OH比的影响

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摘要

Moisture-cured polyurethane is one of the commercially important polymers, which is widely used in sealants, coatings, and reactive hot-melt adhesives. A series of moisture-cured polyurethane/polysiloxane (PUSR) copolymers were successfully prepared using a two-step solution polymerization procedure. Both amine-terminated polysiloxane (PDMS) and polyester diol were together used as mixed soft segments to react with 4,4'-diphenlymethane diisocyanate (MDI), and the alkoxysilane was used as end-capping agents. The effects of structure variation of building blocks such as the polyester diol structure and NCO/OH ratio on the properties and morphology of PUSR copolymers were studied. The tensile properties, dielectric behavior, thermal stability, surface, and water-repellency properties were investigated. The results showed that the properties and morphology of PUSR copolymers were greatly affected by the variations in molecular architecture. (C) 2008 Wiley Periodicals, Inc.
机译：湿固化的聚氨酯是商业上重要的聚合物之一，广泛用于密封胶，涂料和反应性热熔胶中。使用两步溶液聚合程序成功制备了一系列湿固化的聚氨酯/聚硅氧烷（PUSR）共聚物。胺端基的聚硅氧烷（PDMS）和聚酯二醇都一起用作混合的软链段，以与4,4'-二苯甲烷二异氰酸酯（MDI）反应，而烷氧基硅烷则用作封端剂。研究了结构单元的结构变化，如聚酯二醇结构和NCO / OH比对PUSR共聚物的性能和形态的影响。研究了拉伸性能，介电性能，热稳定性，表面和疏水性能。结果表明，PUSR共聚物的性能和形态受到分子结构变化的极大影响。 （C）2008 Wiley期刊公司

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