化工进展2011，Vol.30Issue(7)：1542-1545,4.
MDI-50型聚氨酯弹性体的合成及性能
Synthesis and properties of MDI-50 type polyurethane elastomer
摘要
Abstract
MDI-50 type polyurethane elastomer was prepared from a prepolymer system based on MDI-50, polyol and MOCA chain extender. The effects of mass fraction of -NCO in prepolymer on properties of the elastomer were studied. The structure and performance were analyzed by means of DSC, TG, FTIR and mechanical properties test. The results showed that hardness and glass transition temperature of MDI-50 type polyurethane elastomer increased with increasing molar ratio of NCO/OH in prepolymer reactive system. The tearing strength and tensile intensity increased at first and then declined with increasing mass content of -NCO. However, elongation at break of the elastomer and viscosity of prepolymer decreased with increasing -NCO mass content. It showed that better properties were obtained at 2.22 of the molar ratios of NCO/OH. -NCO mass content had little influence on thermal stability of the elastomer .The result provided data for the application of formula design of MDI-50 type polyurethane elastomer.关键词
预聚体；MDI-50；聚氨酯弹性体；结构与性能Key words
prepolymer/ MDI-50/ polyurethane elastomer/ structure and performance分类
化学化工引用本文复制引用
李万捷,林殷雷,郑玉刚..MDI-50型聚氨酯弹性体的合成及性能[J].化工进展,2011,30(7):1542-1545,4.基金项目
山西省科技厅资助项目(2008072043)。 （2008072043）
