【摘 要】
：
Many materials,for instance water,glycerol,n-alcohol and polymer,have demonstrated physical property deviations from their bulk counterparts when they are in confinement.1,2 Such phenomena are very st
【机 构】
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School of Materials Science and Engineering,Wuhan University of Technology,430070,China
【出 处】
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The 11th International Symposium on Polymer Physics(PP2014)(
论文部分内容阅读
Many materials,for instance water,glycerol,n-alcohol and polymer,have demonstrated physical property deviations from their bulk counterparts when they are in confinement.1,2 Such phenomena are very striking in thin polymer films,for which the glass transition temperature (Tg)3,4,5 and viscosity2 are widely observed to deviate from their bulk values when a film is created having a thickness below some critical value.In PS thin films,a reduction of Tg by up to 40 ℃ from its bulk value is observed for a film deposited on a Si/SiOx substrate6,7,a value that increases to 70 ℃ in a free-standing film4.
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