烯丙基醚改性光固化聚氨酯丙烯酸酯  

Allyl ether Modified UV Curable Polyurethane-acrylate Resins

作　　者：袁慧雅[1] 黄亮[1] 曾兆华[1] 杨建文[1] 陈用烈[1] 

机构地区：[1]中山大学高分子研究所,广州510275

出　　处：《应用化学》2003年第8期744-748,共5页Chinese Journal of Applied Chemistry

基　　金：广东省科技攻关项目 (粤财企 [2 0 0 1] 3 67号 )

摘　　要：合成了共混、悬挂和封端的 3种烯丙基醚改性聚氨酯丙烯酸酯 (PUAE) ,通过DPC、FTIR比较了它们在UV固化过程中抗氧抑制作用。发现在空气条件下 ,光固化速率大小依次为悬挂型PUAE >封端型PUAE >共混型PUAE。在N2 气气氛下光固化转化率随着烯丙基醚含量的增大而减少 ,而在空气中的结果则相反 ,表明烯丙基醚在自由基光固化过程中具有抗氧抑制的作用。FTIR结果显示烯丙基醚双键在空气中的转化率比在N2 气中明显提高 ,而丙烯酰氧基双键从N2 气中的 75 %减少到空气中的 6 0 %左右。TGA结果表明 ,共混型的PUAE在 118 74℃出现 1个失重峰 。Three kinds of UV curable allyl ether modified polyurethane acrylate(PUAE), i.e., blended, blocked and terminated PUAEs were studied. It was found that the curing rate in oxygen investigated by DPC decreased in the order of blocked>terminated >blended. With increased allyloxy content, the final conversion of terminated PUAE reduced in nitrogen, but reversed in oxygen. IR showed that the conversion of allyloxy was higher in oxygen than in nitrogen, but reversed for acrylate which deceased from 75% in nitrogen to 60% in air. Thermogravimetric analysis(TGA) indicated that the mass loss of blended PUAE occurred at 118 74 ℃. The blocked and terminated PUAE were superior in thermal stability to the blended counterpart.

关 键 词：烯丙基醚 聚氨酯丙烯酸酯 氧阻聚 

分 类 号：O631[理学—高分子化学]