Aging of thin polymer films cast from a near-theta solvent.
Aging of thin polymer films cast from a near-theta solvent.
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DOI：
10.1103/physrevlett.105.227801
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发表时间：
2010-11
影响因子：
8.6
通讯作者：
A. Raegen;Mithun Chowdhury;C. Calers;A. Schmatulla;U. Steiner;G. Reiter
中科院分区：
文献类型：
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作者：
A. Raegen;Mithun Chowdhury;C. Calers;A. Schmatulla;U. Steiner;G. Reiter
我们研究了旋转铸造聚合物薄膜的老化行为作为其加工历史的函数。从接近Θ温度的溶液中制备的薄膜在室温下老化不同时间，然后在聚合物的玻璃化转变温度以上进行去湿实验。特征老化时间随溶剂质量的不同而变化很大，这归因于铸态薄膜中扭曲的链状构象。这表明了聚合物薄膜的非平衡性，可能导致了它们的一些无法解释的性质。
We have examined the aging behavior of spin-cast thin polymer films as a function of their processing history. Films prepared from solutions close to the Θ temperature were aged for varying times at room temperature, followed by a dewetting experiment above the glass transition temperature of the polymer. The characteristic aging time varied strongly with the quality of the solvent, which is attributed to distorted chain conformations in the as-cast films. This is an indication for the nonequilibrium nature of thin polymer films, possibly causing some of their unexplained properties.