The Effect of Transreactions on Phase Behavior in Poly(ethylene 2,6-naphthalate) and Poly(ethylene isophthalate) Blends

Young Kil Chang; Ji Ho Youk; Won Ho Jo; Sang Cheol Lee

doi:10.1002/(sici)1097-4628(19990906)73:10<1851::aid-app4>3.0.co;2-1

The Effect of Transreactions on Phase Behavior in Poly(ethylene 2,6-naphthalate) and Poly(ethylene isophthalate) Blends

Young Kil Chang, Ji Ho Youk, Won Ho Jo, Sang Cheol Lee

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

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 ¹H 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.

Original language	English
Pages (from-to)	1851-1858
Number of pages	8
Journal	Journal of Applied Polymer Science
Volume	73
Issue number	10
DOIs	https://doi.org/10.1002/(sici)1097-4628(19990906)73:10<1851::aid-app4>3.0.co;2-1
State	Published - 6 Sep 1999
Externally published	Yes

Keywords

Degree of randomness
Phase composition
Phase fraction
Transreactions

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10.1002/(sici)1097-4628(19990906)73:10<1851::aid-app4>3.0.co;2-1

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title = "The Effect of Transreactions on Phase Behavior in Poly(ethylene 2,6-naphthalate) and Poly(ethylene isophthalate) Blends",

abstract = "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 1H 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.",

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AU - Jo, Won Ho

AU - Lee, Sang Cheol

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Y1 - 1999/9/6

N2 - 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 1H 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.

AB - 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 1H 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.

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KW - Phase fraction

KW - Transreactions

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The Effect of Transreactions on Phase Behavior in Poly(ethylene 2,6-naphthalate) and Poly(ethylene isophthalate) Blends

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Keywords

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