还原氧化石墨烯对PP结晶和力学性能的影响
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摘要
采用硼氢化钠对氧化石墨烯(GO)进行还原制备了还原氧化石墨烯(GE),通过熔融共混法制备了还原氧化石墨烯/聚丙烯(GE/PP)复合材料。研究了不同的GE用量对GE/PP复合材料的结晶性能和力学性能的影响。结果表明:随着GE含量增加,GE在PP中的分散性得到改善;GE质量分数增加到2.0%时,复合材料的结晶温度提高了4.4℃,结晶能力提高,拉伸强度提高了12.9 MPa。
Reduced graphene oxide(GE) was prepared by reducing graphene oxide(GO) with sodium borohydride and reduced graphene oxide/polypropylene(GE/PP) composites were prepared by melt blending. The effects of different dosages of GE on the crystallization and mechanical properties of GE/PP composites were investigated. The results show that as the content of GE increases, the dispersibility of GE in PP is improved. When the mass fraction of GE increases to 2.0%, the crystallization temperature of the composite increases by 4.4 ℃,which indicates the improvement of its crystallization ability. The tensile strength is increased by 12.9 MPa.
Reduced graphene oxide(GE) was prepared by reducing graphene oxide(GO) with sodium borohydride and reduced graphene oxide/polypropylene(GE/PP) composites were prepared by melt blending. The effects of different dosages of GE on the crystallization and mechanical properties of GE/PP composites were investigated. The results show that as the content of GE increases, the dispersibility of GE in PP is improved. When the mass fraction of GE increases to 2.0%, the crystallization temperature of the composite increases by 4.4 ℃,which indicates the improvement of its crystallization ability. The tensile strength is increased by 12.9 MPa.
引文
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[3] HUMMERS W S,OFFEMAN R E.Preparation of graphitic oxide[J].Journal of the American Chemical Society,1958,80(6):1339-1339.
[4] DREYER D R,PARK S,BIELAWSKI C W,et al.The chemistry of graphene oxide [J].Chemical Society Reviews,2010,39(1):228-240.
[5] ZHOU T,CHEN F,TANG C,et al.The preparation of high performance and conductive poly (vinyl alcohol)/graphene nanocomposite via reducing graphite oxide with sodium hydrosulfite [J].Composites Science and Technology,2011,71(9):1266-1270.
[6] RAMANATHAN T,ABDALA A A,STANKOVICH S,et al.Functionalized graphene sheets for polymer nanocomposites [J].Nat Nanotechnol,2008,3(6):327-331.
[7] TABATABAEI S H,CARREAU P J,AJJI A.Structure and properties of MDO stretched polypropylene [J].Polymer,2009,50(16):3981-3989.
[8] CHEN Y,YIN Q,ZHANG X,et al.The crystallization behaviors and rheological properties of polypropylene/graphene nanocomposites:The role of surface structure of reduced graphene oxide[J].Thermochimica Acta,2018,661:124-136.
[9] ZHAO S,CHEN F,HUANG Y,et al.Crystallization behaviors in the isotactic polypropylene/graphene composites [J].Polymer,2014,55(16):4125-4135.
[10] SONG P,CAO Z,CAI Y,et al.Fabrication of exfoliated graphene-based polypropylene nanocomposites with enhanced mechanical and thermal properties [J].Polymer,2011,52(18):4001-4010.
[11] JIANG Q,JIA H,WANG J,et al.Effects of nucleating agents on crystallization behavior and mechanical properties of high-fluid polypropylene[J].Iranian Polymer Journal,2012,21(3):201-209.