Textile Science and Engineering (한국섬유공학회지)

The Korean Fiber Society (한국섬유공학회)
권호 표지

Enhancement of Scratch Resistance of Polycarbonate by the Addition of Mineral Silica

실리카 첨가에 의한 폴리카보네이트 수지의 니스크래치 특성 개선

  • Lee, Byung-Ick (Department of Polymer and Fiber System Engineering, Chonnam National University) ;
  • Lim, Gyun-Taek (Department of Polymer and Fiber System Engineering, Chonnam National University) ;
  • Lee, Moo-Sung (School of Applied Chemical Engineering, Chonnam National University)
  • 이병익 (전남대학교 고분자.섬유시스템공학과) ;
  • 임균택 (전남대학교 고분자.섬유시스템공학과) ;
  • 이무성 (전남대학교 응용화학공학부 광.전자화공소재)
  • Received : 2011.03.16
  • Accepted : 2011.05.21
  • Published : 2011.06.30
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Abstract

Polycarbonate (PC)/mineral silica composites were prepared by melt-mixing to improve PC's surface characteristics. The silica's surface was modified using a silane coupling agent with amine functional moiety prior to blending. The effects of silica on the PC's morphology, dynamic mechanical properties, molecular weight, and pencil hardness were investigated. Although SEM showed that silane treatment promoted interfacial adhesion between the PC and the silica, the storage modulus of the PC/silica composites increases with increasing silica content irrespective of silane treatment. Silica addition decreased the molecular weight (MW), and thus the melt viscosity of PC in the composites. The reduction was slightly greater at higher silica contents and when silane-treated silica was added. Despite the detrimental effects of silica on the MW, the pencil hardness of the PC increased to F grade when silane-treated silica of 40 phr was added possibly due to the increased modulus and interfacial adhesion.

Keywords

Acknowledgement

Supported by : 전남대학교

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