Enthalpy relaxation in poly(ethylene terephthalate) and related polyesters

E.A. McGonigle; S.D. Jenkins; J.J. Liggat; R.A. Pethrick

doi:10.1002/1097-0126(200011)49:11<1458::AID-PI529>3.0.CO;2-U

Enthalpy relaxation in poly(ethylene terephthalate) and related polyesters

E.A. McGonigle, S.D. Jenkins, J.J. Liggat, R.A. Pethrick

Pure And Applied Chemistry

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

4 Citations (Scopus)

Abstract

Enthalpic relaxation data are presented on poly(ethylene terephthalate), poly(ethylene naphthalate) and their copolymers. Analysis of these data allows the determination of the amount of energy absorbed at the glass transition, Qt, and the location of the enthalpic recovery peak, Tmax, as a function of the time of ageing of the samples. Ageing measurements were carried out for periods of up to 2016 h and at temperatures between 40 °C and 110 °C, depending upon the chemical composition of the system being investigated. The enthalpic relaxation rates are influenced by the chemical structure and reflect the effects of local order pinning the chains and influencing the rate of enthalpic recovery.

Original language	English
Pages (from-to)	1458-1463
Number of pages	5
Journal	Polymer International
Volume	49
Issue number	11
DOIs	https://doi.org/10.1002/1097-0126(200011)49:11<1458::AID-PI529>3.0.CO;2-U
Publication status	Published - Nov 2000

Keywords

poly(ethylene terephthalate)
poly(ethylene naphthalate)
copolymers
physical ageing
enthalpy relaxation
DSC
relaxation pinning

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10.1002/1097-0126(200011)49:11<1458::AID-PI529>3.0.CO;2-U

http://dx.doi.org/10.1002/1097-0126(200011)49:11<1458::AID-PI529>3.0.CO;2-U

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Cite this

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title = "Enthalpy relaxation in poly(ethylene terephthalate) and related polyesters",

abstract = "Enthalpic relaxation data are presented on poly(ethylene terephthalate), poly(ethylene naphthalate) and their copolymers. Analysis of these data allows the determination of the amount of energy absorbed at the glass transition, Qt, and the location of the enthalpic recovery peak, Tmax, as a function of the time of ageing of the samples. Ageing measurements were carried out for periods of up to 2016 h and at temperatures between 40 °C and 110 °C, depending upon the chemical composition of the system being investigated. The enthalpic relaxation rates are influenced by the chemical structure and reflect the effects of local order pinning the chains and influencing the rate of enthalpic recovery.",

keywords = "poly(ethylene terephthalate), poly(ethylene naphthalate), copolymers, physical ageing, enthalpy relaxation, DSC, relaxation pinning",

author = "E.A. McGonigle and S.D. Jenkins and J.J. Liggat and R.A. Pethrick",

year = "2000",

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doi = "10.1002/1097-0126(200011)49:11<1458::AID-PI529>3.0.CO;2-U",

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T1 - Enthalpy relaxation in poly(ethylene terephthalate) and related polyesters

AU - McGonigle, E.A.

AU - Jenkins, S.D.

AU - Liggat, J.J.

AU - Pethrick, R.A.

PY - 2000/11

Y1 - 2000/11

N2 - Enthalpic relaxation data are presented on poly(ethylene terephthalate), poly(ethylene naphthalate) and their copolymers. Analysis of these data allows the determination of the amount of energy absorbed at the glass transition, Qt, and the location of the enthalpic recovery peak, Tmax, as a function of the time of ageing of the samples. Ageing measurements were carried out for periods of up to 2016 h and at temperatures between 40 °C and 110 °C, depending upon the chemical composition of the system being investigated. The enthalpic relaxation rates are influenced by the chemical structure and reflect the effects of local order pinning the chains and influencing the rate of enthalpic recovery.

AB - Enthalpic relaxation data are presented on poly(ethylene terephthalate), poly(ethylene naphthalate) and their copolymers. Analysis of these data allows the determination of the amount of energy absorbed at the glass transition, Qt, and the location of the enthalpic recovery peak, Tmax, as a function of the time of ageing of the samples. Ageing measurements were carried out for periods of up to 2016 h and at temperatures between 40 °C and 110 °C, depending upon the chemical composition of the system being investigated. The enthalpic relaxation rates are influenced by the chemical structure and reflect the effects of local order pinning the chains and influencing the rate of enthalpic recovery.

KW - poly(ethylene terephthalate)

KW - poly(ethylene naphthalate)

KW - copolymers

KW - physical ageing

KW - enthalpy relaxation

KW - DSC

KW - relaxation pinning

UR - http://dx.doi.org/10.1002/1097-0126(200011)49:11<1458::AID-PI529>3.0.CO;2-U

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DO - 10.1002/1097-0126(200011)49:11<1458::AID-PI529>3.0.CO;2-U

M3 - Article

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