摘要
以聚己二酸乙二醇酯（PEA）、2，4-甲苯二异氰酸酯（TDI-100）、扩链剂（MOCA）、4A分子筛为原料，采用预聚法制备了聚氨酯（PU）／4A分子筛复合材料。考察了不同筛分方式处理的分子筛对PU／4A分子筛复合材料力学性能、耐溶剂性能的影响，并以DSC分析了分子筛对PU／4A复合材料的硬链段结晶形态及耐热性能。结果表明，PU／4A复合材料的力学性能与分子筛的前处理密切相关，用400目分析筛处理的效果优于用200目分析筛处理的分子筛，且当其质量分数为5％时，所制备的PU／4A-400复合材料的综合力学性能最好，耐溶剂性能大幅度提高，与纯聚氨酯相比，增重率降低55％～60％。DSC分析结果显示，复合材料中的脲基键的断裂温度明显提高。
The polyurethane/4A zeolite composites was prepared by pre-polymerization method, from the polyethylene glycol adipate （ PEA）, toluene 2,4-diisocyanate （TDI-100） , extender（MOCA） and 4A zeolite. It was investigated that the effect of different methods of screen separation to zeolite 4A particles on the mechanical properties and solvent resistance of PU/4A composites. The heat resistance and morphology of hard segment of PU/4A was analyzed by DSC. The results showed that the mechanical properties of PU/4A zeolite composites were closely related to the pre-process of zeolite particles. The mechanical properties of PU/4A were better than that of PU/4A-200, and the comprehensive mechanical properties of PU/4A-400 composites was the best when the loading of zeolite 4A was 5%. The solvent resistance of PU/4A-400 composites was enhanced. Compared with pure PU, the degree of swelling was reduced by 50% - 60%. DSC results indicated that the pyrogenous temperature of urethane bond of PU/4A composites was increased.
出处
《聚氨酯工业》
2006年第4期14-17,共4页
Polyurethane Industry
基金
国家自然科学基金项目(50273025)
山西省自然科学基金(20031026)资助
