STRUCTURE PERMEABILITY RELATIONSHIPS OF POLYIMIDES WITH BRANCHED OR EXTENDED DIAMINE MOIETIES

被引:87
作者
STERN, SA [1 ]
LIU, Y [1 ]
FELD, WA [1 ]
机构
[1] WRIGHT STATE UNIV, DEPT CHEM, DAYTON, OH 45435 USA
关键词
PERMEABILITY OF GASES IN 6FDA POLYIMIDES; POLYIMIDES; 6FDA; PERMEATION OF GASES IN; SELECTIVITY OF 6FDA POLYIMIDES FOR GAS SEPARATIONS;
D O I
10.1002/polb.1993.090310804
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Mean permeability coefficients for CO2, O2, N2, and CH, in seven types of 6FDA polyimides with branched or extended diamine moieties were determined at 35.0-degrees-C (95.0-degrees-F) and at pressures up to 10.5 atm (155 psia). In addition, solubility coefficients for CO2, O2, N2, and CH4 in six of these polyimides were determined at 35.0-degrees-C and at 6.8 atm (100 psia). Mean diffusion coefficients for the six gas/polyimide systems were calculated from the permeability and solubility data. The relationships between the chemical structure of the polyimides, some of their physical properties (glass transition temperature, mean interchain spacing, specific free volume), and their gas permeability, diffusivity, and solubility behavior are discussed. The 6FDA polyimides studied here exhibit a considerably lower selectivity for the CO2 / CH4 and O2 / N2 gas pairs than 6FDA polyimides with short and stiff aromatic diamines with comparable CO2 and O2 permeabilities.
引用
收藏
页码:939 / 951
页数:13
相关论文
共 46 条
[1]   VAN DER WAALS VOLUMES + RADII [J].
BONDI, A .
JOURNAL OF PHYSICAL CHEMISTRY, 1964, 68 (03) :441-+
[2]  
BRECK DW, 1974, ZEOLITE MOL SIEVES, P636
[3]  
CHERN RT, 1985, ACS SYM SER, V269, P25
[4]   SELECTIVE PERMEATION OF CO2 AND CH4 THROUGH KAPTON POLYIMIDE - EFFECTS OF PENETRANT COMPETITION AND GAS-PHASE NONIDEALITY [J].
CHERN, RT ;
KOROS, WJ ;
YUI, B ;
HOPFENBERG, HB ;
STANNETT, VT .
JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS, 1984, 22 (06) :1061-1084
[5]   ISOMERIC POLYIMIDES BASED ON FLUORINATED DIANHYDRIDES AND DIAMINES FOR GAS SEPARATION APPLICATIONS [J].
COLEMAN, MR ;
KOROS, WJ .
JOURNAL OF MEMBRANE SCIENCE, 1990, 50 (03) :285-297
[6]  
Crank J., 1979, MATH DIFFUSION, V2nd
[7]   POLYIMIDES CONTAINING OXYETHYLENE UNITS [J].
FELD, WA ;
RAMALINGAM, B ;
HARRIS, FW .
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, 1983, 21 (02) :319-328
[8]   POLYIMIDES CONTAINING NONAROMATIC NITROGEN LINKAGES [J].
FELD, WA ;
LE, TB .
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, 1992, 30 (06) :1099-1102
[9]  
GURJAR M, 1988, POLYM PREPRINTS, V29, P314
[10]  
HARAYA K, 1986, MAKU MEMBRANE, V11, P48