Autophobic dewetting of polystyrenes on the substrates grafted with chemically identical polymers
作者： Hoyeon Lee , Wooseop Lee , Young Soo Han , Eunkyoung Kim , Du Yeol Ryu
DOI: 10.1038/PJ.2016.10
关键词:
摘要: We present the autophobic dewetting behavior of polymer melt droplets on chemically identical brushes. The model layers were set to define interface between polystyrenes (PSs) and corresponding brushes having variable chain lengths (or molecular weights), then thermally annealed above glass transition temperature. Autophobic melts in a dry brush regime was characterized by well-defined PS that dewetted upon thermal annealing. contact angle (θ) interfacial tension (γm/b) significantly increased as length decreased grafting density increased. speculated γm/b increasingly converges maximum (γ*m/b) at extremely short dense brush, indicating super autophobicity brush. polystyrene (PS) evaluated when (γ*m/b).
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