摘要
以工业化石墨烯粉体(IGN)与苯乙烯为原料,聚乙烯醇、磷酸三钙为分散剂,过氧化苯甲酰为引发剂,聚苯乙烯(PS)树脂作为非共价改性组分,通过超声分散、悬浮聚合法制备了聚苯乙烯/高分散石墨烯复合材料,探究了超声分散时间与PS含量对IGN在复合材料中的分散性影响机理。结果表明,PS可提高IGN在苯乙烯(St)单体中的相容性;超声时间30min,PS添加量为St单体质量的3%时,复合材料微观形貌较好,IGN分散性较佳;随着PS/IGN中IGN含量的增加,复合材料的外延起始降解温度逐渐提高40℃,玻璃化转变温度最大提升7.3℃,拉伸强度由43.5 MPa增强至68.3MPa,提升近65%。
The highlydispersed polystyrene/graphene composites were prepared by ultrasonic dispersion and suspension polymerization using styrene and industrial graphene(IGN)as raw materials,polyvinyl alcohol and tricalcium phosphate as dispersing agents,benzoyl peroxide as an initiator and polystyrene resin(PS)as a non-covalent modifier.The effects of ultrasonic dispersion time and PS content on the dispersion of IGN in the matrix were investigated.The experimental results indicated that the addition of PS could effectively improve the compatibility of IGN with styrene monomer.IGN achieved an optimum dispersion in the matrix when ultrasonic time was set as30min and PS content was set to3%in the monomer.With an increase of weight ratioof IGN/PS,the initial degrading temperature of the composites increased by40℃,the glass transition temperature increase by7.3℃maximally,and tensile strength increased by approximately65%from43.5MPa to68.3MPa.
作者
黄健
赵子琪
陈跳
黄昊
马保国
HUANG Jian;ZHAO Ziqi;CHEN Tiao;HUANG Hao;MA Baoguo(State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China;Hubei Provincial Academy of Building Research and Design, Wuhan 430070, China)
出处
《中国塑料》
CAS
CSCD
北大核心
2018年第12期41-48,共8页
China Plastics
基金
十三五国家重点研发专项(2016YFC0700905-04)
国家自然科学基金(51303146)
关键词
石墨烯
聚苯乙烯
非共价改性
悬浮聚合
耐热性能
graphene,polystyrene,non-covalent modification,suspension polymerization,heat resistance
