Polymer coating for razors

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  • 2011.03.23 / 2019.12.24
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목차
1.Principle of the patent – US Patent 5,113,585
2.Polystyrene, Polyethylene Oxide, Polymer Blends, Glass Transition Temperature
3.Increasing Mechanical Properties & Microstructure
4.Methods for fabricating the structure
5.Reference


본문내용
Water-soluble material-shaving aid material
Molecular weights 에 따라Liquid 또는 low-melting solid 상태로 존재
Physical Properties
Tg= -67oC
Low toxicity
Non-Toxic
의약품, 스킨로션 등
기계적 성질이 안 좋아서 다른 고분자나 이온성 물질과 blend 또는 합성하여 사용


Glass Transition Phenomena

액체를 냉각할 때 물질 고유의 온도영역에서 급격히 굳는 현상
유리전이점 아래에서는 분자운동이 매우 느려 결정화가 불가능
유리전이점를 지나면서 물질의 물리적 성질이 급격하게 변화

Differences between Tg & Tm

Tm :고체에서 유동성의 액체상태로 변화하는 온도(결정부분의 유동이 시작되는 온도)
수지내의 분자들의 운동에너지 증가하여 고분자 사슬간격이 멀어짐으로 인하여 부피의 변화와 더불어 흐르게 된다
Tg :결정영역이 희박한 수지는 유리 전이온도가 존재, Tm와 동일
>>Tg : 유리같이 딱딱하고 깨지기 쉬운 거동
<<Tg : 고무처럼 질긴 거동


참고문헌
Influence of Polymer Blending on Mechanical and Thermal Properties, Buthaina A. Ibrahim & Karrer M.Kadum, University of Technology, Baghdad, Iraq
http://www.chemistry.or.jp/journals/bcsj/bc-cont/bc69-2.html
N.G. McCrum, C.P. Buckley and C.B. Bucknall, Principles of Polymer Engineering, Oxford University Press
Chris Rauwendaal, Polymer Extrusion, Hanser Publishers, New York (1990)
J.L. White, Twin Screw Extrusion: Technology and Principles, Hanser Publishers, New York (1991)
Saechtling, International Plastics Handbook : for the Technologist, Engineer and User 2nd Edition, Hanser Publishers, New York (1987)
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