Premium
Pervaporation separation of aqueous alcohol solution through the membrane of o ‐trimethylsilylphenylacetylene initiated by a tungsten carbene complex
Author(s) -
Teng MinYu,
Lee KueirRarn,
Liaw DerJang,
Lai JuinYih
Publication year - 1999
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/(sici)1097-4628(19991017)74:3<647::aid-app18>3.0.co;2-r
Subject(s) - pervaporation , membrane , aqueous solution , permeation , polymer chemistry , molar mass , amorphous solid , tungsten , chemical engineering , materials science , degree of polymerization , swelling , chemistry , polymerization , polymer , organic chemistry , composite material , biochemistry , engineering
A poly( o ‐trimethylsilylphenylacetylene) [poly( o ‐TMSPA)] initiated by a tungsten carbene complex was investigated under various conditions. The molar mass of poly( o ‐TMSPA) increases with increasing the polymerization temperature and decreasing the initiator concentration. The X‐ray diffraction measurements show that poly( o ‐TMSPA) has an amorphous structure. The water molecules preferentially permeate through the poly( o ‐TMSPA) membranes. The effects of feed compositions, degree of swelling, and the molecular size of alcohols on the pervaporation performances were investigated. The separation factor and the permeation rate increase with increasing ethanol concentration in the feed. The diffusivity contributes to a major part to selective transport. © 1999 John Wiley & Sons, Inc. J Appl Polym Sci 74: 647–654, 1999