文章摘要
氧化石墨烯/聚苯乙烯复合微球的制备及热性能
Preparation of Graphene Oxide/Polystyrene Microspheres and Its Thermal Stability
  
DOI:10.16865/j.cnki.1000-7555.2018.07.031
中文关键词: 氧化石墨烯  聚苯乙烯  微球  热稳定性
英文关键词: graphene oxide  polystyrene  microsphere  thermal stability
基金项目:国家重点研发计划(2017YFB0702800)
作者单位
金 铭,何文军,李亚男,俞峰萍,杨为民 中国石化上海石油化工研究院 绿色化工与工业催化国家重点实验室,上海 201208 
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中文摘要:
      采用表面活性剂为分散剂,通过悬浮聚合制得氧化石墨烯/交联聚苯乙烯复合微球,并对复合微球进行了扫描电镜、X射线衍射、红外光谱及热重等测试表征。结果表明,氧化石墨烯能够均匀分散在交联聚苯乙烯微球中;并且氧化石墨烯片层上能够牢固吸附聚苯乙烯分子链。氧化石墨烯的良好分散及对分子链段的吸附可有效地提高复合微球的热稳定性,氧化石墨烯质量分数为0.4%时,复合微球外推起始分解温度提高约50 ℃;然而氧化石墨烯的加入一定程度降低了复合微球的交联密度,其玻璃化转变温度仅提高2~4℃。
英文摘要:
      Graphene oxide/copolymer polystyrene microspheres with surfactant used as dispersing agent were prepared by in situ suspension polymerization. The samples were characterized by SEM,XRD,FT-IR spectrometer and thermogravimetric analysis. The results show that graphene oxide not only disperses uniformly in the matrix but also absorbs the polystyrene molecular chains tightly. Moreover, due to the good dispersion state of graphene oxide and the restriction on the chains, the microspheres show greatly enhanced thermal stability, the temperature of the extrapolated onset of the nanocomposites increases by 50 ℃ with loading of 0.4% graphene oxide. However the glass transition temperature of the microspheres is only increased by 2~4 ℃ since the addition of graphene oxide would decrease the crosslinking density of the composite microspheres.
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