TY - JOUR
T1 - Polymer characterization and gas permeability of poly(1-trimethylsilyl-1-propyne) [PTMSP], poly(1-phenyl-1-propyne) [PPP], and PTMSP/PPP blends
AU - Morisato, A.
AU - Shen, H. C.
AU - Sankar, S. S.
AU - Freeman, B. D.
AU - Pinnau, I.
AU - Casillas, C. G.
PY - 1996/9/30
Y1 - 1996/9/30
N2 - Pure gas and hydrocarbon vapor transport properties of blends of two glassy, polyacetylene-based polymers, poly(1-trimethylsilyl-1-propyne) [PTMSP] and poly(1-phenyl-1-propyne) [PPP], have been determined. Solid-state CP/MAS NMR proton rotating frame relaxation times were determined in the pure polymers and the blends. NMR studies show tit PTMSP and PPP form strongly phase-separated blends. The permeabilities of the pure polymers and each blend were determined with hydrogen, nitrogen, oxygen, carbon dioxide, and n-butane. PTMSP exhibits unusual gas and vapor transport properties which result from if extremely high free volume. PTMSP is more permeable to large organic vapors, such as n-butane, than to small, permanent gases, such as hydrogen. PPP exhibits gas permeation characteristics of conventional low free volume glassy polymers; PPP is more permeable to hydrogen than to n-butane. In PTMSP/PPP blends, both n-butane permeability and n-butane/hydrogen selectivity increase as the PTMSP content of the blends increases.
AB - Pure gas and hydrocarbon vapor transport properties of blends of two glassy, polyacetylene-based polymers, poly(1-trimethylsilyl-1-propyne) [PTMSP] and poly(1-phenyl-1-propyne) [PPP], have been determined. Solid-state CP/MAS NMR proton rotating frame relaxation times were determined in the pure polymers and the blends. NMR studies show tit PTMSP and PPP form strongly phase-separated blends. The permeabilities of the pure polymers and each blend were determined with hydrogen, nitrogen, oxygen, carbon dioxide, and n-butane. PTMSP exhibits unusual gas and vapor transport properties which result from if extremely high free volume. PTMSP is more permeable to large organic vapors, such as n-butane, than to small, permanent gases, such as hydrogen. PPP exhibits gas permeation characteristics of conventional low free volume glassy polymers; PPP is more permeable to hydrogen than to n-butane. In PTMSP/PPP blends, both n-butane permeability and n-butane/hydrogen selectivity increase as the PTMSP content of the blends increases.
KW - Blends
KW - Bruggeman model
KW - Gas and vapor transport
KW - Maxwell model
KW - NMR
KW - Poly(1-phenyl-1-propyne)
KW - Poly(1-trimethylsilyl-1-propyne)
UR - http://www.scopus.com/inward/record.url?scp=0030242282&partnerID=8YFLogxK
U2 - 10.1002/(SICI)1099-0488(19960930)34:13<2209::AID-POLB10>3.0.CO;2-9
DO - 10.1002/(SICI)1099-0488(19960930)34:13<2209::AID-POLB10>3.0.CO;2-9
M3 - Article
AN - SCOPUS:0030242282
SN - 0887-6266
VL - 34
SP - 2209
EP - 2222
JO - Journal of Polymer Science, Part B: Polymer Physics
JF - Journal of Polymer Science, Part B: Polymer Physics
IS - 13
ER -