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The reversible plasticization of the aromatic copolyester of poly(ethylene terephthalate) and 60 mol % p ‐acetoxybenzoic acid with 1,1,1,3,3,3‐hexafluoro‐2‐propanol
Author(s) -
Shih H. H.,
Hornberger L. E.,
Siemens R. L.,
Zachariades A. E.
Publication year - 1986
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.1986.070320512
Subject(s) - copolyester , plasticizer , materials science , solvent , ethylene , polymer chemistry , propanol , chemical engineering , composite material , organic chemistry , chemistry , polyester , ethanol , engineering , catalysis
In recent mechanooptical studies with solution cast films of the aromatic copolyester of poly(ethylene terephthalate) and 60 mol % p ‐acetoxybenzoic acid from 1,1,1,3,3,3‐hexafluoro‐2‐propanol, a volatile solvent with bp 59°C, we observed that the solvent plasticizes and affects considerably the stress–strain behavior of the copolyester at ambient temperature. Whereas a dry copolyester film is typically brittle failing at ≤ 10% strain, a film containing 12% w/w 1,1,1,3,3,3‐hexafluoro‐2‐propanol can be stretched readily to ≥ 300% strain. When the solvent is removed by evaporation or by heating at an elevated temperature (≥ 120°C), the films lose their ductility, indicating that the plasticization is reversible.