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Citation: HAN Baochun, WU Zuolin, ZHANG Chunhu, ZHU Danyang, DING Mengxian, YANG Zhenghu. The Effects of Introducing Trifluoromethyl Side Groups to Diphenyl Ether-type Polyimide Films on Their Water Absorption and Water Vapor Permeability[J]. Chinese Journal of Applied Chemistry, ;2013, 30(5): 523-527. doi: 10.3724/SP.J.1095.2013.20282 shu

The Effects of Introducing Trifluoromethyl Side Groups to Diphenyl Ether-type Polyimide Films on Their Water Absorption and Water Vapor Permeability

Polymer Composites Engineering of Laboratory, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China

Received Date: 26 June 2012
Revised Date: 31 August 2012

Three aromatic diamines containing fluorine were synthesized. In addition,three kinds of diphenyl ether trifluoride polyimide films were prepared by polycondensation,and the polyimide film was prepared by using 4,4'-diaminodiphenylether(BADE) with 3,3',4,4'-biphenyltetracarboxylic dianhydride(BPDA) by the same method.The water vapor permeability,water absorption and thermal properties of these four kinds of polyimide film were studied. The results show that water vapor permeability of polymer PI-1(2,2'-BTF-4,4'-BADE+BPDA,BTF:bis(trifluoromethyl)) is 7.70 g/(h·m²),the water absorption is 0.67%,the glass transition temperature is 259.74℃,and the temperature of mass loss of 5% is 521.40℃,the polymer has good water vapor permeability and low water absorption.
- polyimides,
- trifluoromethyl,
- synthesis,
- water vapor permeability,
- water absorption
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