季戊四醇对水性聚氨酯微相分离结构与性能的影响  

Effect of Pentaerythritol on Micro-phase Separation and Performance of Waterborne Polyurethane

作　　者：董伟[1,2] 陈政[1,2] 唐金财[1,2] 韩颜庭[1,2] 辛中印[1,2] 

机构地区：[1]四川大学皮革化学与工程教育部重点实验室,四川成都6100652 [2]四川大学制革清洁技术国家工程实验室,四川成都610065

出　　处：《中国皮革》2013年第13期13-17,27,共6页China Leather

摘　　要：以二环己基甲烷二异氰酸酯(HMDI)、聚四氢呋喃二醇(PTMG)、二羟甲基丁酸(DMBA)和季戊四醇(PE)为主要原料,制备了内交联型水性聚氨酯,研究了季戊四醇(PE)对聚氨酯微相分离结构及耐热性能、力学性能等的影响。结果表明:合成了预期的内交联型水性聚氨酯,材料有微相分离现象;PE用量从0%增加到2%,初始分解温度(Ti)升高了29℃,材料的热稳定性提高,软段和硬段玻璃化温度(Tg)升高,软硬段间的△Tg增大21℃,材料微相分离程度增大;随着PE用量的增加,耐水、耐溶剂性能,弹性模量(E')和拉伸强度增加,断裂伸长率和拉伸回复率减小。Inner crosslinked waterborne polyurethane （ WPU ） was prepared by using dicyclohexyl methane diisocyanate （ HM- DI }, polytetramethylene glycol （ PTMG）, dimethylolbutyric acid （ DMBA ） and pentaerythritol （PE） as materials. The effects of PE on micro - phase separation, heat resistance and mechanical properties were studied. The results show that ： Inner crosslinked waterborne polyurethane in expected which have the phenomenon of micro - phase separation is synthesized. Initial decomposition temperature （Ti） raise 29℃ with the increase of PE content from 0% to 2.0%, thermal stability of the material is improved, glass transition temperature （Tg） of ments increases 21℃, the degree of resistance, elastic modulus （ E＇） and soft and hard segments increase, and the margin of Tg （ △Tg） between hard and soft seg- micro - phase separation increase. As increasing the content of PE, water resistance, solvent tensile strength increase, meanwhile, elongation at break and stretch recovery rate decrease.

关 键 词：水性聚氨酯 季戊四醇 微相分离 性能研究 

分 类 号：TS565[轻工技术与工程—皮革化学与工程]