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|Author(s):||Joonsung (. Yoon; Christopher M. Stafford;|
|Title:||Polymeric Gels Prepared from the Mixtures of Polar Polymers and Ionic Liquids for Thermally Remendable Coating Systems|
|Published:||November 07, 2010|
|Abstract:||A new kind of physical gels was prepared using the mixtures of poly(vinyl alcohol) (PVOH) and high melting ionic liquid (IL), 1-ethylpyridinium bromide. As the IL content was increased, the stiffness of the mixtures decreased sharply while extensibility increased significantly, exhibiting rubber-like elasticity. X-ray scattering studies indicated that IL is highly miscible with PVOH and forms a new amorphous phase that coexists with the crystalline phase of PVOH. Thermal analysis showed that both melting temperature (Tm) and glass transition temperature (Tg) decreased noticeably as IL content increased. The peak intensity associated with melting transition decreased as well, indicating decreased overall crystallinity. Due to the highly suppressed Tg of the mixtures, thermal flow can be induced easily by mild heating. Noticeable healing effect via thermal flow was observed for scratched films prepared from IL-rich mixtures, suggesting that these mixtures could be used for thermally remendable coating systems.|
|Conference:||2010 AIChE Annual Meeting|
|Proceedings:||Conference Proceedings of the 2010 AIChE Annual Meeting|
|Pages:||pp. 1 - 6|
|Location:||Salt Lake City, UT|
|Dates:||November 7-12, 2010|
|Keywords:||polymer, gel, ionic liquid, self-healing, coating, blends, mechanical properties, morphology|
|Research Areas:||Characterization, Advanced Materials, Polymers|
|PDF version:||Click here to retrieve PDF version of paper (222KB)|