Bulk and surface composition of poly(vinyltrimethylsilane- b-dimethylsiloxane) copolymer membranes as studied by i.r. and ATR-i.r. spectroscopy

Poly(vinyltrimethylsilane- b-dimethylsiloxane) diblock copolymers of different chemical compositions and/or molecular masses have been investigated. They belong to the most promising membrane materials with enhanced gas permeability and separation selectivity. Membrane performances of copolymers are...

Full description

Saved in:
Bibliographic Details
Published in:Spectrochimica acta. Part A: Molecular spectroscopy 1988, Vol.44 (11), p.1117-1123
Main Authors: Zelei, B., Székely, T., Gladkova, N.K., Durgaryan, S.G.
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
Exchange resins and membranes
Forms of application and semi-finished materials
Polymer industry, paints, wood
Technology of polymers
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Poly(vinyltrimethylsilane- b-dimethylsiloxane) diblock copolymers of different chemical compositions and/or molecular masses have been investigated. They belong to the most promising membrane materials with enhanced gas permeability and separation selectivity. Membrane performances of copolymers are known to depend on the bulk and surface composition and morphology. The bulk and surface composition have been analyzed by traditional i.r. and ATR-i.r. spectroscopy, on cyclohexane cast film and foil samples, respectively. At certain chemical compositions, partial block separation and surface layer succession have been observed. In these cases the outermost layers were always enriched in poly(dimethylsiloxane). On samples containing 27 and 44% (m/m) siloxane component, however, no surface layer successions have been detected. Gas separation factors show small maxima at these compositions.
ISSN:0584-8539
DOI:10.1016/0584-8539(88)80081-3