Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 49: Issue 1
Dilatometric studies of physical aging of polyetherimide
Authors:
J. Sobieski School of Engineering, University of Pittsburgh, 15261 Pittsburgh, PA USA

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S. Simon School of Engineering, University of Pittsburgh, 15261 Pittsburgh, PA USA

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D. Plazek School of Engineering, University of Pittsburgh, 15261 Pittsburgh, PA USA

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Pages:
455–460
Online Publication Date:
03 Aug 2005
Publication Date:
01 Jul 1997
Article Category:
Research Article
DOI:
https://doi.org/10.1007/bf01987470
Keywords:
glass; physical aging; polyetherimide; volume recovery
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Abstract  

Physical aging of polyetherimide (PEI) was studied using a bellows dilatometer based on Zoller's design. A linear variable differential transformer (LVDT) is used to measure the displacement of the bellows. The voltage output of the LVDT is interfaced to a computer for automated data collection. Isothermal aging experiments were carried out at temperatures near the glass temperature (206–209 ‡C) using a constant temperature oil bath maintained at the desired aging temperature. The time required to reach equilibrium and the reduced curve produced by aging time-temperature superposition are given. The results compare well with data obtained by capillary dilatometry for the same material.

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Cover Journal of Thermal Analysis and Calorimetry
Journal of Thermal Analysis and Calorimetry
Print ISSN:
1388-6150
Online ISSN:
1572-8943

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation		 1969
Volumes
per Year		 1
Issues
per Year		 24
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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