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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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蒽醌型蓝色扩链剂及其PUA共聚物乳液的制备与性能
DOI: 10.11777/j.issn1000-3304.2015.14417, PP. 610-616
Keywords: 蒽醌型扩链剂,聚氨酯,乳液共聚合,丙烯酸酯,耐光色牢度
Abstract:
首先以1-甲氨基-4-溴-蒽醌和2-氨基-2-甲基-1,3-丙二醇为原料,通过取代反应合成了蒽醌型蓝色扩链剂1-(1,1-二(羟甲基))乙氨基-4-甲氨基蒽醌(HMEMAQ),并将其与N,N-二(2-羟乙基)丙烯酰胺作为扩链剂合成出聚氨酯预聚体,然后经与甲基丙烯酸甲酯和丙烯酸丁酯的接枝乳液共聚合制备出了性能稳定的共聚型蓝色聚氨酯-丙烯酸酯共聚物(PUA)乳液.然后用1H-NMR、FTIR、UV-Vis吸收光谱、粒度和电位分析、氙灯老化等方法对HMEMAQ的化学结构、PUA乳液及乳胶膜的性能进行了表征.研究发现,在N2气氛下,用偶氮类AIBN作为引发剂可以有效避免PUA乳液合成过程中生色基团的氧化变色现象.当AIBN用量达到不饱和单体的2wt%时,接枝反应的单体转化率可达到99.9%.HMEMAQ用量对乳液的胶体性质和单体转化率没有明显影响.PUA聚合物和HMEMAQ的UV-Vis吸收光谱保持一致,最大吸收波长均为640.8nm.与具有相同生色基团的共混型蓝色PUA乳胶膜相比,共聚型PUA乳胶膜的耐光色牢度和耐溶剂色牢度有明显的提高.
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