摘要
为改善聚对苯二甲酸乙二醇酯(PET)的阻燃性能,设计了氧化石墨烯(GO)改性2-羧乙基苯基次磷酸(CEPPA)阻燃聚酯(PET)体系(CPET-GO)。通过Hummers法制备GO,采用原位聚合法制备CPET-GO复合物,并对其阻燃性能进行研究。借助锥形量热仪及极限氧指数仪对复合物的燃烧及阻燃性能进行表征。针对聚合物力学性能受微观晶型结构影响的问题,借助差示扫描量热仪对CPET-GO的非等温结晶行为进行表征,用Jeziorny法修正的Avrami方程分析CPET-GO结晶前期的非等温结晶行为。结果表明,与PET相比CPET-0.1G的极限氧指数增加至28%,热释放速率峰值(PHRR)下降45.7%;在结晶初期,Jeziorny法修正后的结晶速率常数(Z_(c))为0.37~1.00;与CPET相比,添加质量分数为0.1%的GO(CPET-0.1G)时,样品的半结晶时间(t_(1/2))缩短;随GO添加量增加,CPET-GO的Z_(c)降低、t_(1/2)延长。
In order to improve the flame-retardant performance of polyester(PET),graphene oxide(GO)modified 2-carboxyethyl phenyl hypophosphorous acid(CEPPA)flame-retardant polyester(PET)system(CPET GO)was designed.GO was prepared by Hummers method,CPET-GO composites were prepared by in-situ polymerization,and the flame retardant properties were studied.The combustion and flame-retardant properties of the composites were characterized by cone calorimeter and limiting oxygen index meter.Aiming at the problem that the mechanical properties of the polymers are affected by microscopic crystal structure,the non-isothermal crystallization behavior of CPET-GO was characterized by differential scanning calorimeter,and the non isothermal crystallization behavior of CPET-GO was analyzed by the Avrami equation modified with the Jeziorny method.The results show that compared with PET,the limiting oxygen index of CPET-0.1G is increased to 28%,and the thermal release rate peak is decreased by 45.7%;at the initial stage of crystallization,the crystallization rate constant(Z_(c))modified by Jeziorny method is 0.37~1.00;compared with CPET,the half crystallization time(t_(1/2))of the sample is shortened when the mass fraction of GO is 0.1%(CPET-0.1G);while increasing the amount of GO reduces Z_(c)of CPET-GO and increases t_(1/2).
作者
王照颖
魏建斐
王锐
Zhaoying Wang;Jianfei Wei;Rui Wang(School of Materials Design&Engineering,Beijing Institute of Fashion Technology;Beijing Key Laboratory of Clothing Materials R&D and Assessment,Beijing Engineering Research Center of Textile Nano Fiber,Beijing Institute of Fashion Technology,Beijing 100029,China)
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2022年第1期57-66,共10页
Polymer Materials Science & Engineering
基金
国家重点研发计划(2017YFB0309002)
北京学者项目(RCQJ20303)。
关键词
氧化石墨烯
聚酯
阻燃
2-羧乙基苯基次磷酸
非等温结晶
graphene oxide
polyester
flame retardant
2-carboxyethylphenyl hypophosphite
non-isothermal crystallization
作者简介
通讯联系人:王锐,主要从事功能材料研究,E-mail:clywangrui@bift.edu.cn。
