Synthesis and gas permeation properties of poly(4-methyl-2-pentyne)

被引:144
作者
Morisato, A [1 ]
Pinnau, I [1 ]
机构
[1] MEMBRANE TECHNOL & RES INC,MENLO PK,CA 94025
关键词
poly(4-methyl-2-pentyne); polyacetylenes; gas and vapor permeation; gas separations;
D O I
10.1016/S0376-7388(96)00183-4
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
Poly(4-methyl-2-pentyne) [PMP] is an amorphous, glassy, di-substituted acetylene-based polymer. PMP has a low density of 0.78 g/cm(3) and a high fractional free volume of 0.28. The permeabilities for helium, hydrogen, nitrogen, oxygen, carbon dioxide, methane, ethane, propane, and n-butane were determined at temperatures from 20 to 65 degrees C and pressures from 10 to 150 psig. PMP is the most permeable purely hydrocarbon-based polymer known; its permeabilities are only exceeded by poly(1-trimethylsilyl-1-propyne) [PTMSP] and poly(1-trimethylgermyl-1-propyne) [PTMGeP]. The oxygen permeability of PMP at 25 degrees C is 2700 x 10(-10) cm(3)(STP) cm/cm(2) s cmHg and the nitrogen permeability is 1330 X 10(-10) cm(3)(STP) cm/cm(2) s cmHg. The high gas permeabilities in PMP result from its very high free volume, and probably, interconnectivity of the free-volume-elements. For a glassy polymer, PMP exhibits unusual organic vapor permeation properties. Permeabilities in PMP are higher for large, condensable gases, such as n-butane, than for small, permanent gases such as helium. The permeabilities of condensable gases and permanent gases decrease as the temperature is increased. This behavior is completely unexpected for a glassy polymer and has been observed previously in only high-free-volume glassy PTMSP.
引用
收藏
页码:243 / 250
页数:8
相关论文
共 27 条
[1]  
Baker R. W., 1994, POLYM GAS SEPARATION, P353
[2]   VAN DER WAALS VOLUMES + RADII [J].
BONDI, A .
JOURNAL OF PHYSICAL CHEMISTRY, 1964, 68 (03) :441-+
[3]   FICKIAN DIFFUSION OF ALKANES THROUGH GLASSY-POLYMERS - EFFECTS OF TEMPERATURE, DIFFUSANT SIZE, AND POLYMER STRUCTURE [J].
CHEN, SP ;
EDIN, JAD .
POLYMER ENGINEERING AND SCIENCE, 1980, 20 (01) :40-50
[4]  
Haraya K., 1986, Membrane, V11, P48
[5]   AN INVESTIGATION OF THE HIGH GAS-PERMEABILITY OF POLY (1-TRIMETHYLSILYL-1-PROPYNE) [J].
ICHIRAKU, Y ;
STERN, SA ;
NAKAGAWA, T .
JOURNAL OF MEMBRANE SCIENCE, 1987, 34 (01) :5-18
[6]  
LANGSAM M, 1989, Patent No. 4759776
[7]   SELECTION OF BARRIER MATERIALS FROM MOLECULAR-STRUCTURE [J].
LEE, WM .
POLYMER ENGINEERING AND SCIENCE, 1980, 20 (01) :65-69
[8]   DIFFUSION AND SOLUTION OF GASES IN SUBSTITUTED POLYACETYLENE MEMBRANES [J].
MASUDA, T ;
IGUCHI, Y ;
TANG, BZ ;
HIGASHIMURA, T .
POLYMER, 1988, 29 (11) :2041-2049
[9]   POLY[1-(TRIMETHYLSILYL)-1-PROPYNE] - A NEW HIGH POLYMER SYNTHESIZED WITH TRANSITION-METAL CATALYSTS AND CHARACTERIZED BY EXTREMELY HIGH GAS-PERMEABILITY [J].
MASUDA, T ;
ISOBE, E ;
HIGASHIMURA, T ;
TAKADA, K .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1983, 105 (25) :7473-7474
[10]   POLYMERIZATION OF ALIPHATIC ACETYLENES - POLYMERIZATION OF METHYLPENTYNES BY TRANSITION-METAL CATALYSTS - MONOMER STRUCTURE, REACTIVITY, AND POLYMER PROPERTIES [J].
MASUDA, T ;
KAWASAKI, M ;
OKANO, Y ;
HIGASHIMURA, T .
POLYMER JOURNAL, 1982, 14 (05) :371-377