Substituted propyne polymers—part II. Effects of aging on the gas permeability properties of poly[1‐(trimethylsilyl)propyne] for gas separation membranes
作者:
Michael Langsam,
Lloyd M. Robeson,
期刊:
Polymer Engineering&Science
(WILEY Available online 1989)
卷期:
Volume 29,
issue 1
页码: 44-54
ISSN:0032-3888
年代: 1989
DOI:10.1002/pen.760290109
出版商: Society of Plastics Engineers
数据来源: WILEY
摘要:
AbstractPoly[1‐(trimethylsilyl)propyne] (PTMSP) is an unusual polyyne material which is optically clear, exhibits high solubility in nonpolar organic solvents, and good oxygen compatibility. By contrast, polyacetylene is black, insoluble, and is unstable in oxygen. The long term stability of PTMSP has been determined by a combination of thermal gravimetric analysis (TGA) and permeability test procedures under a number of different isothermal aging conditions. The use of commercial antioxidants at up to 2 weight percent improves the long term stability of PTMSP. The presence of the antioxidant has no effect on the surface fluorination of PTMSP. Testing of PTMSP films for over eight months shows no change in either permeability or selectivity in contrast to previously reported dat
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