自由基型阻燃改性聚丙烯的制备及性能评估  

Preparation and Performance Evaluation of Free Radical Type Flame Retardant Modified Polypropylene

作　　者：董玲玲 林倬仕 李平阳 叶文 许保云 翟金国 DONG Lingling;LIN Zhuoshi;LI Pingyang;YE Wen;XU Baoyun;ZHAI Jinguo(Shanghai Research Institute of Chemical Industry Co.,Ltd.,Shanghai 200062,China;State Key Laboratory of Polyolefins and Catalysis,Shanghai 200062,China;Shanghai Engineering Research Center of Functional Flame Retardant Materials,Shanghai 200062,China;Shanghai Key Laboratory of Catalysis Technology for Polyolefins,Shanghai 200062,China)

机构地区：[1]上海化工研究院有限公司,上海200062 [2]聚烯烃催化技术与高性能材料国家重点实验室,上海200062 [3]上海功能阻燃材料工程技术中心,上海200062 [4]上海聚烯烃催化技术重点实验室,上海200062

出　　处：《上海塑料》2021年第4期33-38,共6页Shanghai Plastics

基　　金：上海市功能阻燃材料工程技术中心(19DZ2253700)。

摘　　要：以2,3-二甲基-2,3-二苯基丁烷(联枯)和对异丙苯聚合物(聚联枯)作为自由基产生剂与氢溴酸三聚氰胺盐(MHB)、次磷酸铝(AHP)复配成一种新型自由基型复合阻燃剂。将不同复配比例的复合阻燃剂添加到聚丙烯(PP)中,对阻燃PP材料的阻燃性能、力学性能进行测试,探讨了阻燃剂的最佳配比。结果表明:当m(AHP)∶m(MHB)∶m(聚联枯/联枯)为6∶3∶1时,样条的性能最佳,聚联枯的热稳定性优于联枯,在热老化后,采用聚联枯的部分配方仍能达到垂直燃烧试验离火自熄的水平。研究了无机粉体对该阻燃体系的协效作用,结果表明:在阻燃剂中添加质量分数为30%的氢氧化铝(ATH)能明显提高试样的阻燃性。研究了阻燃剂总体添加量对样条阻燃性的影响,结果表明:当阻燃剂添加质量分数为1.5%时,样条在垂直燃烧试验中仍可达到离火自熄的水平。2,3-Dimethyl-2,3-diphenylbutane(DMDPB)and benzene,1,4-bis(1-methylethyl)-homopolymer(PDMDPB)were used as free radical generating agents,which were compounded with melamine hydrobromide(MHB)and aluminum hypophosphite(AHP)to prepare a new type of free radical type flame retardant.Different amount of composite flame retardants were added to polypropylene(PP).The flame retardancy and mechanical properties of the flame retardants modified PP were tested,and the optimal ratio of the flame retardant was discussed.The results show that when m(AHP):m(MHB):m(DMDPB/PDMDPB)is 6∶3∶1,the performance of the sample is the best,and the thermal stability of PDMDPB is better than DMDPB.After thermal aging,some samples which were prepared by PDMDPB can still reach the level of self-extinguish in vertical combustion test.The synergistic effect of inorganic powder on the flame retardant system was studied.The results show that the flame retardancy of the samples are obviously improved by adding 30% aluminum hydroxide(ATH).The effect of the total amount of flame retardant on the flame retardancy of the sample was studied.The results show that when the mass fraction of flame retardant is 1.5%,the samples still reach the level of self-extinguishing in vertical combustion test.

关 键 词：聚丙烯 自由基 阻燃剂 聚联枯 氢氧化铝 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]