In:
Journal of Polymer Science Part C: Polymer Symposia, Wiley, Vol. 22, No. 1 ( 1968-01), p. 367-376
Abstract:
The thermal degradation of poly(vinyl acetate) under high vacuum between 230 and 300°C. was investigated by gas chromatographic analysis of the volatile products, rate measurements by the loss‐of‐weight method, and infrared determinations of the residue at different stages of the reaction. Acetic acid was proved to be the main component of the volatile products (90 to 95%). Kinetic measurements of numerous samples obtained in different polymerization conditions showed that the rates of degradation were identical for all the samples and, in particular, independent of the molecular weight. This is contrary to data previously published. Infrared absorption shows a progressive deacetylation of PVAc; very little absorption appears in the region of conjugated double bonds. A crosslinking reaction probably occurs in the very early stages of the degradation and, on the basis of C–H analysis, one has to admit that a chain‐breaking process coexists with the deacetylation reaction.
Type of Medium:
Online Resource
ISSN:
0449-2994
,
1935-3065
DOI:
10.1002/polc.5070220130
Language:
English
Publisher:
Wiley
Publication Date:
1968
detail.hit.zdb_id:
2376268-8
