摘要
利用熔融共混法制备多聚芳基磷酸(BDPB)-倍半硅氧烷(SPH)-聚碳酸酯(PC)/丙烯腈-苯乙烯-丙烯酸丁酯的三元共聚物(ASA)、BDPB-有机蒙脱土(OMMT)-PC/ASA两种阻燃增强复合材料。通过XRD、TG、极限氧指数(LOI)、SEM、XPS、DMA等对所制备BDPB-SPH-PC/ASA、BDPB-OMMT-PC/ASA两种复合材料的微观结构、燃烧性能及动态力学性能进行表征。结果表明:BDPB-SPH和BDPB-OMMT两种复配阻燃体系对PC/ASA复合材料都具有优异的阻燃协同作用,BDPB-SPH-PC/ASA和BDPB-OMMT-PC/ASA复合材料的燃烧等级(UL-94)都可以达到V-0级别,LOI分别达到30.4%和31.2%,同时残炭量分别增加至12.43%和14.24%。随着复配阻燃剂BDPB-SPH和BDPB-OMMT的加入,增强后的PC/ASA复合材料的残余炭层结构更加致密与紧凑,燃烧过程中阻燃剂BDPB、SPH和OMMT会迁徙到PC/ASA材料的表面,形成更稳定的保护层,从而提高PC/ASA复合材料阻燃性能。DMA结果表明,BDPB-SPH和BDPB-OMMT两种阻燃体系的加入都会降低PC/ASA复合材料的玻璃化转变温度(Tg),且在到达Tg前可明显提高阻燃复合材料的储能模量。
Polycarbonate/acrylonitrile styrene acrylate（PC/ASA）composites modified with two kinds of synergistic flame-retardant systems,p-bis-（diphenylphosphoryloxy）-benzol（BDPB）-silsesquioxanes,phenyl,hydroxyterminated（SPH）and BDPB-organically modified montmorillonite（OMMT）,respectively,were prepared by melt compounding.The microstructure、combustion behavior and dynamic mechanical properties were investigated by XRD,TG,limiting oxygen index（LOI）,SEM,XPS and DMA test.The results indicate that the BDPB-SPH and BDPB-OMMT flame-retardant systems exhibit a synergistic effect.The BDPB-SPH-PC/ASA and BDPB-OMMTPC/ASA composites could reach V-0 rating in vertical burning test（UL-94）,and the LOI of the composites reach30.4% and 31.2%,respectively.The residual of BDPB-SPH-PC/ASA and BDPB-OMMT-PC/ASA could increase to 12.43% and 14.24%,respectively.With the loading of BDPB-SPH and BDPB-OMMT flame-retardant systems,the microstructure of residual layer becomes more compact.BDPB,SPH and OMMT tend to accumulate at the surface during combustion,which could promote the formation of stable layer and as a result enhance the flame retardant properties.The glass transition temperature（Tg）of BDPB-SPH-PC/ASA and BDPB-OMMT-PC/ASA compos-ites shift to low temperature,and the storage modulus of the composites are enhanced before Tg.
作者
刘俊威
高山俊
沈春晖
王凯
李思宇
LIU Junwei;GAO Shanjun;SHEN Chunhui;WANG Kai;LI Siyu(Institute of Material Science and Engineering,Wuhan University of Technology,Wuhan 430070,China)
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2018年第11期3062-3072,共11页
Acta Materiae Compositae Sinica
基金
教育部新世纪优秀人才支持计划(NCET-12-0912)
关键词
三元共聚物
复合材料
阻燃
磷酸酯
倍半硅氧烷
有机改性蒙脱土
polycarbonate/acrylonitrile styrene acrylate
composites
flame retardant
phosphate
silsesquioxanes
montmorillonite
