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OALib Journal期刊
ISSN: 2333-9721
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聚丙烯-聚磷酸酯嵌段共聚物的设计与合成
DOI: 10.3724/SP.J.1105.2013.12273, PP. 518-525
Keywords: 聚丙烯,聚磷酸酯,原子转移自由基聚合,嵌段共聚物,阻燃
Abstract:
以苯乙烯基团封端的聚丙烯(PP-t-St)为起始物,通过马氏加成反应将溴化氢(HBr)加成到该聚丙烯的苯乙烯双键上,得到了苄基溴基团封端的等规聚丙烯(PP-t-BzBr).以PP-t-BzBr为大分子引发剂,引发含磷烯烃单体4-乙烯基苄基膦酸二乙酯(DEVBP)的原子转移自由基聚合(ATRP),合成了一种新型聚丙烯-聚磷酸酯嵌段共聚物(PP-b-PDEVBP,其中PDEVBP嵌段质量含量可达64.3%).对该共聚物进行了1H-NMR表征、示差扫描量热(DSC)、热失重(TGA)和微型量热(MCC)分析,结果表明该嵌段共聚物在保持聚丙烯本身的熔点和结晶度的同时,有效降低了热释放速率和提高了高温热分解残余物,可望改善聚丙烯材料的阻燃性.
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