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Preparation of soluble copolyurethaneimide containing oxyethylene and oxypropylene units
Author(s) -
Kim InChul,
Kim JongHo,
Lee KewHo,
Tak TaeMoon
Publication year - 2002
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/app.10904
Subject(s) - pyromellitic dianhydride , isocyanate , polymer chemistry , solubility , dimethylformamide , polyimide , ethylene glycol , triethylene glycol , peg ratio , polymer , materials science , molar mass distribution , intrinsic viscosity , chemistry , organic chemistry , polyurethane , solvent , finance , layer (electronics) , economics
Soluble copolyurethaneimides were synthesized by the isocyanate method in a solution of N ‐methyl‐2‐pyrrolidone (NMP). The isocyanate‐terminated prepolyurethane prepared from low molecular weight poly(ethylene glycol) (PEG) or poly(propylene glycol) (PPG) and methylene diisocyanate was reacted with pyromellitic dianhydride at high temperature. The resulting copolyurethaneimides were soluble in polar solvents like N ‐methyl‐2‐pyrrolidone and N , N '‐dimethylformamide. The film‐forming properties were investigated by changing the molecular weights of PEG and PPG. With PPG, the film‐forming property was enhanced. The inherent viscosity, solubility, thermal property, molecular weight distribution, and mechanical property were compared with the aromatic polyimide. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 86: 3502–3507, 2002