超临界二氧化碳制备高强度阻燃聚苯醚复合发泡材料  

Preparation of high-strength flame-retardant poly(phenylene ether)composite foams using supercritical carbon dioxide

作　　者：吕正阳 邱健[2] 邢海平[2] 姜治伟[2] 刘杰[2] 唐涛[2] 李三喜[1] LYU Zhengyang;QIU Jian;XING Haiping;JIANG Zhiwei;LIU Jie;TANG Tao;LI Sanxi(School of Environmental and Chemical Engineering,Shenyang University of Technology,Shenyang 110870,China;State Key Laboratory of Polymer Physics and Chemistry,Changchun Institute of Applied Chemistry Chinese Academy of Sciences,Changchun 130022,China)

机构地区：[1]沈阳工业大学环境与化学工程学院,沈阳110870 [2]中国科学院长春应用化学研究所,高分子物理与化学国家重点实验室,长春130022

出　　处：《中国塑料》2024年第11期21-26,共6页China Plastics

基　　金：吉林省科技发展计划项目(YDZJ202303CGZH021)。

摘　　要：通过在聚苯醚(PPO)基材中引入间规聚苯乙烯(sPS)替代高抗冲聚苯乙烯(HIPS),并添加了苯乙烯-乙烯/丁二烯-苯乙烯嵌段共聚物(SEBS)和无卤阻燃剂,结合超临界二氧化碳发泡技术,制备了高强度、高阻燃聚苯醚复合发泡材料。研究了sPS引入对复合材料体系力学性能、发泡行为以及发泡材料压缩强度、阻燃性能的影响。结果表明:sPS的加入大幅度提高了复合材料的刚性和熔体黏弹性;增大的熔体黏弹性提高了复合材料的可发性;加入23%(质量分数,下同)sPS时,发泡倍率从5.9倍提高至36倍;复配无卤阻燃剂,能明显提升复合材料的阻燃性能;PPO/HIPS/sPS复合发泡材料密度为0.14 g/cm^(3)时,阻燃等级达到UL94 V-0级,极限氧指数(LOI)为27.4%;在相同密度0.29 g/cm^(3)时,加入23%sPS的PPO/HIPS/sPS复合发泡材料的压缩强度从1.9 MPa提高至6.4 MPa。In this study,a type of high-strength and high-flame retardant polyphenylene ether(PPO)composite foams was prepared by using syndiotactic polystyrene(sPS)instead of high-impact polystyrene(HIPS),styrene-ethylene/butadienestyrene block copolymers(SEBS),and halogen-free flame retardants through supercritical carbon dioxide foaming.The effect of sPS on the mechanical properties,foaming behavior,compressive strength,and flame-retardant performance of the composite foams were investigated.The results indicated that the introduction of sPS improved the rigidity and melt viscoelasticity of the composites significantly.The foamability of the composites was enhanced with an increase in the melt viscoelasticity.When 23 wt%sPS was added,the foaming rate of the composites increased from 5.9 to 36 times.The introduction of composite halogen-free flame retardants improved the flame-retardant performance of composite foams significantly.The PPO/HIPS/sPS composite foam with a density of 0.14 g/cm^(3) reached a flame-retardant grade of the UL94 V-0 rating and exhibited a limiting oxygen index of 27.4 vol%.At a density of 0.29 g/cm^(3),the PPO/HIPS/sPS composite foam containing 23 wt% of sPS presented an increase in the compressive strength from 1.9 MPa to 6.4 MPa.

关 键 词：聚苯醚 泡沫材料 阻燃 力学性能 

分 类 号：TQ326.53[化学工程—合成树脂塑料工业]