China Plastics ›› 2018, Vol. 32 ›› Issue (12): 41-48.DOI: 10.19491/j.issn.1001-9278.2018.12.007

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Preparation of Polystyrene/Highly Dispersed Graphene Composites by Non-covalent Modification

  

  • Received:2018-06-11 Revised:2018-07-15 Online:2018-12-26 Published:2019-01-25

Abstract: 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 as 30 min and PS content was set to 3 % in the monomer. With an increase of weight ratioof IGN/PS, the initial degrading temperature of the composites increased by 40 ℃, the glass transition temperature increase by 7.3 ℃maximally, and tensile strength increased by approximately 65 % from 43.5 MPa to 68.3 MPa.