• 文献标题:   Preparation and properties of polystyrene nanocomposites with graphite oxide and graphene as flame retardants
  • 文献类型:   Article
  • 作  者:   HAN YQ, WU Y, SHEN MX, HUANG XL, ZHU JJ, ZHANG XG
  • 作者关键词:  
  • 出版物名称:   JOURNAL OF MATERIALS SCIENCE
  • ISSN:   0022-2461 EI 1573-4803
  • 通讯作者地址:   Hohai Univ
  • 被引频次:   80
  • DOI:   10.1007/s10853-013-7234-8
  • 出版年:   2013

▎ 摘  要

In this study, graphite oxides (GOs) with different oxidation degrees and graphene nanosheets were prepared by a modified Hummers method and thermal exfoliation of the prepared GO, respectively. Polystyrene (PS)/GO and PS/graphene nanocomposites were prepared via melt blending. X-ray diffraction results showed that GOs and graphene were exfoliated in the PS composites. It could be observed from the scanning electron microscope images that GOs and graphene were well dispersed throughout the matrix without obvious aggregates. Dynamic mechanical thermal analysis suggested that the storage modulus for the PS/GO1 and PS/graphene nanocomposites was efficiently improved due to the low oxygen content of GO1 and the elimination of the oxygen groups from GO. The flammability of nanocomposites was evaluated by thermal gravimetric analysis and cone calorimetry. The results suggested that both the thermal stability and the reduction in peak heat release rate (PHRR) decreased with the increasing of the oxygen groups in GOs or graphene. The optimal flammability was obtained with the graphene (5 wt%), in which case the reduction in the PHRR is almost 50 % as compared to PS.