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The effect of transreactions on phase behavior in poly(ethylene 2,6‐naphthalate) and poly(ethylene isophthalate) blends
Author(s) -
Chang Young Kil,
Youk Ji Ho,
Jo Won Ho,
Lee Sang Cheol
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(19990906)73:10<1851::aid-app4>3.0.co;2-1
Subject(s) - ethylene , differential scanning calorimetry , materials science , polymer chemistry , phase (matter) , polymer , polymer blend , poly ethylene , glass transition , polyethylene naphthalate , copolymer , chemistry , composite material , organic chemistry , thermodynamics , catalysis , physics
The effect of transreactions on the phase behavior in poly(ethylene 2,6‐naphthalate) and poly(ethylene isophthalate) blends was investigated by using differential scanning calorimetry. The transreactions between two polymers were confirmed by 1 H nuclear magnetic resonance. At the beginning step of transreactions, the blend samples show two glass transitions. However, after transreactions occur to some extent (i.e., when the degree of randomness is >0.4), a single glass transition is observed. As the transreactions proceed, the composition difference between ethylene 2,6‐naphthalate‐rich and ethylene isophthalate‐rich phases lessens. Additionally, the weight fraction of each phase decreases because of the increment of interfacial fraction with the lapse of reaction time. © 1999 John Wiley & Sons, Inc. J Appl Polym Sci 73: 1851–1858, 1999