PERMEABILITY RELATIONSHIPS OF POLYIMIDE COPOLYMERS

被引:33
作者
ZOIA, G
STERN, SA
STCLAIR, AK
PRATT, JR
机构
[1] SYRACUSE UNIV, DEPT CHEM ENGN & MAT SCI, SYRACUSE, NY 13244 USA
[2] NASA, LANGLEY RES CTR, DIV MAT, HAMPTON, VA 23665 USA
关键词
POLYIMIDE COPOLYMERS; GAS PERMEABILITY; 2BDAF SYNTHESIS;
D O I
10.1002/polb.1994.090320107
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
The permeability of the homopolymers 6FDA-3BDAF and 6FDA-4BDAF and of the co-polymers 6FDA-4/2BDAF, 6FDA-4/3BDAF, and 6FDA-4/3/2BDAF to He, CO2, and CH4 WaS measured at 35.0-degrees-C and at pressures up to 10 atm. The experimental values of the permeability coefficients for the copolymers are in satisfactory agreement with the values estimated from the permeability coefficients for the constituent homopolymers and their weight fractions. The synthesis of the fluorine-containing diamine 2BDAF is reported for the first time. (C) 1994 John Wiley & Sons, Inc.
引用
收藏
页码:53 / 58
页数:6
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