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Solvent effect on the conformation in solution of two polyimides
Author(s) -
Joly C.,
Le Cerf D.,
Chappey C.,
Langevin D.,
Muller G.
Publication year - 1997
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/(sici)1097-0126(199712)44:4<497::aid-pi854>3.0.co;2-a
Subject(s) - solvent , polyetherimide , polyimide , viscometer , polymer chemistry , size exclusion chromatography , materials science , intrinsic viscosity , solvent effects , gel permeation chromatography , chemical engineering , polymer , organic chemistry , chemistry , viscosity , composite material , layer (electronics) , engineering , enzyme
The dilute solution properties of two polyimides have been studied using size exclusion chromatography, light scattering and viscometry in various solvents. Molecular parameters (conformation and aggregation) are found to be solvent dependent. Addition of a non‐solvent (H 2 O) to 6FDA‐ m PDA, a fluorine‐containing polyimide, or Ultem a polyetherimide, in the good solvent N ‐methyl‐2‐pyrrolidone is responsible for an increase in molecular weight. This is attributed to aggregation of polyimides in these conditions. ©1997 SCI