Thermal conversions of polymers with macroheterocycles in the chain

✍ Scribed by Siling, S. A. ;Gribkova, P. N. ;Ponomarev, I. I. ;Balykova, T. N. ;Vlasova, I. V. ;Pavlova, S.-S. A. ;Korshak, V. V. ;Vinogradova, S. V.

• Publisher: John Wiley and Sons
• Year: 1983
• Weight: 349 KB
• Volume: 21
• Category: Article
• ISSN: 0360-6376
• DOI: 10.1002/pol.1983.170210906

✦ Synopsis

Abstract

Thermal conversion of polyhexazocyclanes and compound modeling the fragments of polymers were explored within 300–600°C under vacuum (10^−5^ torr) and in water vapor. At temperatures below 450°C, the hydrolytic degradation plays a key role in the thermal degradation of polyhexazocyclanes. At a higher temperature, the homolytic processes prevail, water, strongly retained by the macroheterocycle, is most important in the hydrolysis process. It was shown that the increase in the thermohydrolytic stability of polymers with the system of condensed cycles in the macroheterocycles and that of polyhexazocyclanes modified by polymer analogous conversion at the secondary amino groups of the isoindole cycle was caused by the absence of bound water.