中国塑料 ›› 2024, Vol. 38 ›› Issue (11): 21-26.DOI: 10.19491/j.issn.1001-9278.2024.11.004

• 材料与性能 • 上一篇    下一篇

超临界二氧化碳制备高强度阻燃聚苯醚复合发泡材料

吕正阳1, 邱健2(), 邢海平2(), 姜治伟2, 刘杰2, 唐涛2, 李三喜1()   

  1. 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
  • 收稿日期:2024-02-02 出版日期:2024-11-26 发布日期:2024-11-21
  • 通讯作者: 邢海平(1983—) ,男,副研究员,从事高性能聚合物发泡材料的制备与应用研究, hpxing@ciac.ac.cn
    邱健(1980—) ,男,助理研究员,从事高性能聚合物发泡材料的制备与应用研究,qiujian@ciac.ac.cn
    李三喜(1962—) ,男,教授,从事烯烃催化聚合与精细化学品的合成研究,sanxili@hotmail.com
    E-mail:qiujian@ciac.ac.cn;hpxing@ciac.ac.cn;sanxili@hotmail.com
  • 基金资助:
    吉林省科技发展计划项目(YDZJ202303CGZH021)

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

LYU Zhengyang1, QIU Jian2(), XING Haiping2(), JIANG Zhiwei2, LIU Jie2, TANG Tao2, LI Sanxi1()   

  1. 1.School of Environmental and Chemical Engineering,Shenyang University of Technology,Shenyang 110870,China
    2.State Key Laboratory of Polymer Physics and Chemistry,Changchun Institute of Applied Chemistry Chinese Academy of Sciences,Changchun 130022,China
  • Received:2024-02-02 Online:2024-11-26 Published:2024-11-21
  • Contact: QIU Jian, XING Haiping, LI Sanxi E-mail:qiujian@ciac.ac.cn;hpxing@ciac.ac.cn;sanxili@hotmail.com

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/cm3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/cm3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。

关键词: 聚苯醚, 泡沫材料, 阻燃, 力学性能

Abstract:

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/butadiene⁃styrene 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/cm3 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/cm3, 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.

Key words: poly(phenylene ether), foam material, flame retardant, mechanical property

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