分子筛粒度对PU/4A分子筛复合材料性能的影响

The Study for the Effect of Particles Size of Zeolite 4A on the Properties of PU/4A Composites

以聚已二酸乙二醇酯（PEA）、甲苯二异氰酸酯（TDI-100）、扩链剂（MoCA）、两种不同粒度分布的4A分子筛为原料，采用预聚法制备了聚氨酯／4A分子筛复合材料。考察了不同粒度的4A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。结果表明，Pu／4A复合材料的力学性能与分子筛的粒度密切相关，小粒度分子筛的效果优于大粒度的，且当其质量分数为7％时，所制备的PU／4A复合材料的综合力学性能最好。与纯聚氨酯相比，复合材料的耐溶剂性能大幅度提高，溶胀度减小幅度达55％～60％。

The polyurethane/4A zeolite composites was prepared by pre-polymerization method, with the polyethylene glycol adipate （PEA）, toluene 2,4-ditsocyanate （TDI-100） , extender （MOCA） and two kinds of particles size of 4A zeolite. It was investigated that the effect of differ ent particles size of zeolite 4A on the mechanical properties and solvent resistance of PU/4A composites. The results showed that the mechanical properties of PU/4A zeolite composites was closely related to particles size of zeolite ; the smaller particles of zeolite 4A, the better the properties. And the multiple mechanical properties of PU/4A composites was best when the loading of zeolite 4A was 7%. Compared with pure PU, the solvent resistance of PU/4A composites was improved obviously.