【摘要】 以氨基乙酸-溴化钙(GCB)半有机晶体作为分散粒子,聚四氢呋喃醚二醇(PTMG)、甲苯二异氰酸酯(TDI)为原料,二甲硫基甲苯二胺(DMTDA)为扩链剂,采用预聚法制备了聚氨酯(PU)/GCB复合材料,考察了不同扩链系数、不同GCB半有机晶体添加量的复合材料性能。结果表明,与纯PU相比,PU/GCB复合材料的拉伸强度有所提高,撕裂强度则大幅度提高;复合材料中氨酯羰基的氢键化程度提高,且加入半有机晶体GCB改善了聚氨酯材料的微相分离。更多还原

【Abstract】 A semi-organic crystal of glycine-calcium bromide( GCB) was made by the aqueous solution evaporation method. Based on polytetramethylene( PTMG),toluene diisocyanate( TDI) as raw materials,and 3,5-dimethyl-thioltoluenediamine( DMTDA) as chain extender,and GCB crystal as dispersed particles,the polyurethane /GCB composites were prepared using the pre-polymerization method. The performance of the composites of different chain extension coefficient and different GCB dosage was researched. The results showed that,compared with pure PU,the tear strength of PU / GCB composites increased dramatically and tensile strength increased. The hydrogenbonding degree of urethane carbonyl groups in composites increased and the addition of GCB crystals improved the PU microphase separation.更多还原