共查询到20条相似文献,搜索用时 109 毫秒
1.
2.
3.
4.
介绍了国内外聚氨酯材料的阻燃研究情况,阐述了聚氨酯材料阻燃原理及方法,重点介绍聚氨酯泡沫研究进展,对阻燃聚氨酯材料的发展方向作了展望。 相似文献
5.
6.
聚氨酯材料阻燃技术研究进展 总被引:1,自引:0,他引:1
随着聚氨酯材料的广泛应用,其阻燃技术也越来越受到关注。文章介绍了关于阻燃剂的阻燃机理,包括稀释、覆盖、冷却、化学反应和增强效应等五类。同时,阐述了3种聚氨酯阻燃技术(添加型阻燃、反应型阻燃、提高本子本身的阻燃性)的优缺点以及聚氨酯材料阻燃今后的发展方向,高效低毒无尘或少尘的阻燃技术是聚氨酯行业的必然选择。 相似文献
7.
8.
9.
10.
11.
12.
13.
14.
15.
Homogenous waterborne polyurethane/polyacrylate emulsions were synthesized based on the prepared polyurethane and polyacrylate through a facile process. The attention was attracted to the miscibility and performance of waterborne polyurethane and polyacrylate. The structures and properties of waterborne polyurethane and waterborne polyurethane/polyacrylate samples were characterized by using Fourier transform infrared spectroscopy, transmission electron microscope, X-ray photoelectron spectroscopy, X-ray diffractometer, thermogravimetric, and so forth, as well as solid content and tensile testing. The results showed that the micro morphology of waterborne polyurethane/polyacrylate emulsion presented single-phase structure with the stoichiometric polyacrylate content increasing from 33% to 80% to waterborne polyurethane. The waterborne polyurethane/polyacrylate films surface is rich in polyacrylate phase. Meanwhile, waterborne polyurethane/polyacrylate composites showed significant improvement in thermal stability and elongation at break, smaller particle size and narrower particle size distribution comparing with waterborne polyurethane. 相似文献
16.
17.
聚氨酯胶黏剂在汽车上的应用及研究进展 总被引:2,自引:1,他引:2
介绍了几种聚氨酯胶黏剂如单组分湿固化聚氨酯挡风玻璃密封胶、双组分聚氨酯胶黏剂、水性聚氨酯胶黏剂、聚氨酯反应性热熔胶等在汽车制造和修理上的应用现状及研究进展,重点介绍了应用最为广泛的单组分湿固化聚氨酯挡风玻璃密封胶。指出汽车用聚氨酯胶黏剂将向环保和高性能方向发展。 相似文献
18.
19.
The performance of acrylic polyurethane composite coating and aliphatic urethane composite coating in 3.5% NaCl solution under ultra-violet radiation was studied with methods of EIS, SEM and FTIR. For aliphatic polyurethane coating, the coating resistance decreased and the coating capacitance and porosity increased more quickly than acrylic polyurethane coating. The acrylic polyurethane composite coatings showed better performance than aliphatic polyurethane composite coatings. IR spectra showed that under UV irradiation conditions, the failure mechanism of the two polyurethane coatings was the transformation of sec-amide to primary amides. The fractured bonds in acrylic polyurethane were mainly C–O bonds, while in aliphatic polyurethane they were mainly C–N bonds. The lower protection property of aliphatic polyurethane coating may be mainly attributed to the C–N bonds which are more liable to be broken. 相似文献