Abstract
Transparent plasticized gels with good mechanical, optical, and dielectric properties have important applications in various fields. We prepared a new gel using a poly(butylene terephthalate)-co-poly(alkylene glycol terephthalate) (PBT-co- PAGT) copolymer and a plasticizer, dibutyl adipate (DBA). This method improved the polymer crystallinity, and suppressed particle formation in cast-films when the polymer was dis- solved in 1,1,1,3,3,3-hexafluoro-2-propanol, followed by solvent evaporation, and enabled uniform swelling of the polymer net- work by the plasticizer to form a transparent and flexible gel. The dielectric constants of the developed PBT-co-PAGT/DBA gels are much higher than those of PBT-co-PAGT films at low frequency. We believe that these PBT-co-PAGT/DBA gels could be used as photovoltaic, dielectric, and actuator materials. V C 2015 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Chem. 2015, 00, 000-000
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