ISSN:
0022-3832
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
Polyethylene pinate-4,4′-biphenyldicarboxylate, polyethylene homopinate-4,4′-biphenyldicarboxylate, and polyethylene pinate-terephthalate interpolymers were all prepared on a laboratory scale by ester-interchange reactions. The polymer, fiber and film-forming properties were examined. In the biphenyl systems, little difference was noted between pinate and homopinate; both formed filaments and films in the 40-70 mole-% pinic ranges. In the pinate-terephthalate system this occurred in the 0-40 mole-% pinic range only. Both pinic and homopinic esters are thermally stable at polymerization temperatures of 250-290 °C. for the time necessary to form high molecular weight interpolyesters. Their internal plasticization of highly crystalline, aromatic systems is useful in controlling the properties of interpolyesters from these systems. The crystalline melting points of polyethylene pinate-terephthalate was a continuous, almost straight line relationship over the composition range studied. In the biphenyl systems, a discontinuity appeared in the melting point-composition curves at 30-40 mole-% pinate or homopinate concentration. Possible reasons for this are suggested. An analytical method for determining 4,4′-biphenyldicarboxylic acid is given.
Additional Material:
3 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pol.1959.1203813403
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