Title: STUDIES ON CO[POLY(ETHYLENE TEREPHTHALATE-P-OXYBENZOATE)] THERMOTROPIC COPOLYESTER - THERMOMECHANICAL AND THERMODYNAMIC PROPERTIES
Authors: SHINN, TH
LIN, CC
材料科學與工程學系
Department of Materials Science and Engineering
Issue Date: 12-Dec-1995
Abstract: A series of co[poly(ethylene terephthalate-p-oxybenzoate)] thermotropic copolyesters were prepared by the copolymerization of poly(ethylene terephthalate) (PET) as moiety (II) and p-acetoxybenzoic acid (POB) as moiety (I). The polymeric products obtained were subjected to solid-state polymerization. Characterization of the copolyesters by thermomechanical analysis shows that properties such as the coefficient of thermal expansion, transition temperature, and maximum softening rate temperature varied directly as a function of composition as well as did solid-state polymerization time. All thermomechanical data were found to increase with the solid-state polymerization time due to the increase in the degree of polymerization and the effect of annealing. The coefficient of thermal expansion behaves in a manner that is interpretable by the crystalline state of the copolyester. The relationship between the free-volume fraction and thermodynamic properties is further correlated for a more comprehensive discussion on its molecular arrangements. (C) 1995 John Wiley & Sons. Inc.
URI: http://dx.doi.org/10.1002/app.1995.070581108
http://hdl.handle.net/11536/1599
ISSN: 0021-8995
DOI: 10.1002/app.1995.070581108
Journal: JOURNAL OF APPLIED POLYMER SCIENCE
Volume: 58
Issue: 11
Begin Page: 1981
End Page: 1989
Appears in Collections:Articles


Files in This Item:

  1. A1995TE75100008.pdf