ISSN:
0025-116X
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
Aiming to prove that commercial, 50°CPVC consists of a dual population of chains, has led us to the investigation of the thermal stability of low conversion (0,1-2%) PVC. Bulk polymers prepared at very low conversion levels were shown to be different to high conversion material. The former are more syndiotactic, and have a greater tendency to be less thermally stable, unzippering to long polyene sequences (with n 〉 15). These findings are consistent with the idea that initially-produced PVC is formed by homogeneous polymerisation and that such material is intrinsically different to PVC which is formed at subsequently higher conversions by a heterogeneous route.
Additional Material:
4 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/macp.1987.021881202
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