聚氨酯/氨基乙酸-溴化钙半有机晶体复合材料的制备与性能  

Preparation and properties of polyurethane / glycine calcium bromide semi-organic crystal composites

作　　者：吴怡康[1] 吕志平[1] 佟玉超[1] 孙建[1] 彭紫强 

机构地区：[1]太原理工大学精细化工研究所,太原030024

出　　处：《合成橡胶工业》2016年第2期108-113,共6页China Synthetic Rubber Industry

基　　金：山西省自然科学基金资助项目(2013011011-3)

摘　　要：采用水溶液蒸发法合成氨基乙酸-溴化钙(GCB)半有机晶体,以聚己内酯、甲苯二异氰酸酯为原料,二甲硫基甲苯二胺为扩链剂,GCB为分散粒子,通过预聚法制备了不同扩链系数的聚氨酯(PU)/GCB复合材料,并考察了其性能。结果表明,与PU相比,PU/GCB复合材料的微相分离程度明显提高;GCB使PU中氨酯羰基的氢键化程度有较大提高;GCB的加入对PU的耐热性能没有明显作用;GCB的加入使复合材料的拉伸强度和撕裂强度均有所提高,扯断伸长率呈现先减小后增大的趋势,当扩链系数为0.95、GCB质量分数为2%时,复合材料的拉伸强度和撕裂强度达到最大值,比纯PU分别提高了14%和24%。Semi-organic crystal glycine calcium bromide（ GCB） was synthesized by evaporation method from aqueous solution, and polyurethane（ PU） /GCB composites was prepared using prepolymerization method with polycaprolactone,toluene diisocyanate as materials, dimethythiotoluene diamine as chain extender and GCB as disperse particles,the properties of the composites were investigated. The results showed that the degree of microphase separation of PU / GCB composites improved significantly compared with PU materials.The addition of GCB made the hydrogen-bonding degree of urethane carbonyl groups in PU improving evidently,but had no obviously effect on heat resistance of PU materials. The tensile strength and tear strength of the composites increased,and the elongation at break decreased first and then increased with GCB addition in the composites. The maximum of tensile strength and tear strength of the composites reached with chain extension coefficient0. 95 and mass fraction of GCB 2 %, raised by14 % and 24 % separately compared with the blank.

关 键 词：聚氨酯 氨基乙酸-溴化钙 半有机晶体 预聚法 微相分离 氢键 动态力学性能 力学性能 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业]