纺织学报 ›› 2024, Vol. 45 ›› Issue (04): 50-58.doi: 10.13475/j.fzxb.20221101001
袁野1,2, 张安莹1, 魏丽菲3, 高建伟4, 陈咏5, 王锐1()
YUAN Ye1,2, ZHANG Anying1, WEI Lifei3, GAO Jianwei4, CHEN Yong5, WANG Rui1()
摘要:
为探究9,10-二氢-9-氧杂-10-磷杂菲-10-氧化物(DOPO)类阻燃剂对聚对苯二甲酸乙二醇酯(PET)聚合反应过程的影响,以[(6-氧代-6H-二苯并[c,e][1,2]氧磷杂己环-6-基)甲基]丁二酸(DDP)作为反应型阻燃剂,通过聚合反应得到磷含量不同的阻燃PET(PET-DDP),研究其聚合反应动力学并分析DDP添加量、缩聚反应温度对合成反应动力学的影响,并分析了PET-DDP的阻燃性能和力学性能。结果表明:聚合条件不变的情况下,随DDP添加量的增加,酯化反应阶段反应釜内压力升高速度加快,有利于乙二醇中对苯二甲酸的溶解,反应活化能由81.37 kJ/mol降低至59.52 kJ/mol,缩聚反应的反应速率常数K减小,反应活化能由69.67 kJ/mol增加至233.49 kJ/mol,聚合物熔点降低,结晶性能和力学性能下降;当缩聚反应温度为270 ℃,磷质量分数为1.10%时,PET的阻燃性能得到明显提升,极限氧指数为34%,与纯PET相比,热释放速率峰值和总热释放量分别降低了45.2%和27.3%,且炭层的连续性和致密性明显增加。
中图分类号:
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