不同致孔剂对聚氨酯微孔膜通透性能的影响

以聚乙二醇、改性纤维素、尿素、聚乙烯吡咯烷酮和木粉作为聚氨酯微孔膜的致孔剂。通过对聚氨酯微孔膜的透湿性能、力学性能、吸湿性能、孔隙率以及扫描电镜等表征手段分析表明,加入致孔剂后聚氨酯微孔膜的透湿性能、吸湿性能、孔隙率和手感等都有显著的提高和改善。聚氨酯微孔膜的透湿量、吸湿率和孔隙率最高分别达到1876.81g.mm/(m2.24h)、180%和7.55%,分别比未加致孔剂的聚氨酯微孔膜提高了315%、350%和358%。聚乙二醇、尿素和木粉具有优良的致孔性能。

Effect of different porogens on permeability of polyurethane microporous films

In this paper five different porogens,such as polyethylene glycol(PEG),modified cellulose,carbamide,polyvinylpyrrolidone and wood flour,which affected the moisture permeability and mechanical properties of polyurethane microporous films,were investigated.The influence of the dosage and difference of porogens were also investigated through the moisture permeability,hygroscopic property,mechanical property of polyurethane microporous films,and SEM.The results indicated that the moisture permeability,hygroscopic property,porosity and the feel of the polyurethane microporous films were greatly improved.The moisture permeability,moisture absorption rate and porosity could achieve 1 876.81 g·mm/(m2·24 h),180% and 7.55% respectively,which increased by 315%,350% and 358% respectively.The polyethylene glycol,carbamide,wood flour had the excellent performance.