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The Crystallization of Polycarbonate Film Using Methylene Chloride/1,3-Dioxolane as a Solution Casting Co-Solvent  

Kim, Whan-Ki (Dept. of Polymer Science and Engineering, Dankook University)
Kim, Jae-Hyun (Dept. of Polymer Science and Engineering, Dankook University)
Kim, Sung-Do (SKC Central R&D Center)
Han, Joon-Hee (SKC Central R&D Center)
Kang, Ho-Jong (Dept. of Polymer Science and Engineering, Dankook University)
Publication Information
Polymer(Korea) / v.32, no.5, 2008 , pp. 483-488 More about this Journal
Abstract
The effect of methylene chloride/1,3-dioxolane co-solvent on the crystallization in the optical polycarbonate film was investigated. Increasing 1,3-dioxolane content in co-solvent resulted in the crystallization due to the lowering of solvent evaporation rate during film drying process. The crystallization in PC film could be minimized by either controlling of solvent composition and increasing solvent drying temperature. It was found that the surface roughness of solution casting PC film was affected by both crystallization and solvent evaporation rate. This morphological effect by alternative solvent is ascribed to a large decrease in light transmissivity on the optical PC film.
Keywords
methylene chloride; 1,3-dioxolane; co-solvent; polycarbonate; crystallization;
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