Analysis of polystyrene surface properties on thin film bonding under carbon dioxide pressure using nanoparticle embedding technique
Analysis of polystyrene surface properties on thin film bonding under carbon dioxide pressure using nanoparticle embedding technique
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DOI：
10.1002/polb.21756
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发表时间：
2009-08
期刊：
影响因子：
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通讯作者：
Jintao Yang;Chuntai Liu;Yong Yang;Bin Zhu;L. J. Lee;H. Chen;Y. Jean
中科院分区：
文献类型：
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作者：
Jintao Yang;Chuntai Liu;Yong Yang;Bin Zhu;L. J. Lee;H. Chen;Y. Jean
采用金纳米粒子包埋技术研究了真空和加压CO2对聚苯乙烯（PS）薄膜性能的影响。加压CO2大大增加了金纳米颗粒的嵌入深度，可能是由于在膜表面附近的低内聚能密度。对于本研究中使用的单分散PS（Mn = 214，000），当嵌入深度大于PS分子回转半径的一半时，两个紧密接触的旋涂薄膜可以在低于体玻璃化转变温度（Tg）的CO2压力下结合。
A gold nanoparticle embedding technique is used to determine how vacuum and pressured carbon dioxide (CO 2 ) affect polystyrene (PS) thin film properties. The pressured CO 2 greatly increased the gold nanoparticle embedding depth, possibly due to a low cohesive energy density near the film surface. For the monodisperse PS used in this study (M n = 214,000), two spin-coated thin films with intimate contact can be bonded below the bulk glass transition temperature (T g ) under CO 2 pressure when the embedded depth is larger than half of the gyration radius of PS molecules.