✦ LIBER ✦

Synthesis and characterization of aliphatic unsaturated polyesters from trans-4-octene-1,8-dioic and trans-3-hexene-1,6-dioic acids

✍ Scribed by G. Maglio; C. Marchetta; A. Botta; R. Palumbo; M. Pracella

Book ID: 103072661
Publisher: Elsevier Science
Year: 1979
Tongue: English
Weight: 381 KB
Volume: 15
Category: Article
ISSN: 0014-3057
DOI: 10.1016/0014-3057(79)90098-3

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✦ Synopsis

The influence of the double bond on the thermodynamic parameters, T m, AH,. and AS,.

of some unsaturated aliphatic polyesters has been found to depend on the number of --CH2--groups separating the double bond from the ester linkage. Thus, T,,'s of the polyesters derived from trans-4octene-l,8-dioic acid (OD) are lower than those for the corresponding saturated polyesters; no such effect has been observed by comparing T.'s of polyesters derived from trans-3-hexene-l,6-dioic acid (HD) and adipic acid respectively. X-ray investigation has shown, for polyesters of the OD series, the presence of the two polymorphic forms.

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