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Aromatic-aliphatic copolyesters—II. Various polycondensation processes

✍ Scribed by P. Bajaj; D.N. Khanna

Book ID
103074764
Publisher
Elsevier Science
Year
1981
Tongue
English
Weight
335 KB
Volume
17
Category
Article
ISSN
0014-3057

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✦ Synopsis

Aromatic aliphatic copolyesters, using hydroquinone, resorcinol, 4A'-dihydroxybiphenyl (DHBP) 2,2 bis(4-hydroxyphenyl)propane and 4,4'-dihydroxydiphenyl sulphone (DHDPS) as bispbenols and ethylene glycol as diol, have been synthesized by interfacial, low temperature and high temperature solution condensation. Relative reactivities of these bisphenols and ethylene glycol have been evaluated by various polycondensation methods at a fixed ratio of bisphenol/glycol. Decrease in the extent of polymerization and viscosity was observed by incorporation of aliphatic diol. Viscosity was also influenced by the chemical structure of the bisphenol.

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Factorial optimization of the effects of extrusion temperature profile and polymer grade on as-spun aliphatic–aromatic copolyester fibers. II. Crystallographic order
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## Abstract By using factorial experimental design, a range of crystallographic orders for as‐spun linear aliphatic–aromatic copolyester fibers have been characterized with the aid of wide angle X‐ray diffraction measurements. Full‐Width Half‐Maximum of an X‐ray scattering profile (FWHM) has been q