EFFECT OF MOLECULAR-MASS ON THE CHARACTER OF THERMAL TRANSFORMATIONS IN POLYACRYLONITRILE

Authors
ANDREEVA OA BURKOVA LA BASOK MO
Citation
Oa. Andreeva et al., EFFECT OF MOLECULAR-MASS ON THE CHARACTER OF THERMAL TRANSFORMATIONS IN POLYACRYLONITRILE, Vysokomolekularnye soedinenia. Seria A, 37(6), 1995, pp. 959-963
Citations number
7
Categorie Soggetti
Polymer Sciences
Journal title
Vysokomolekularnye soedinenia. Seria A → ACNP
ISSN journal
05075475
Volume
37
Issue
6
Year of publication
1995
Pages
959 - 963
Database
ISI
SICI code
0507-5475(1995)37:6<959:EOMOTC>2.0.ZU;2-2
Abstract
The effects of molecular mass on the character of thermal transformati ons in PAN have been studied by IR spectroscopy and differential therm al analysis. Cyclization involving nitrile groups becomes possible upo n thermal unwinding of the hydrocarbon helix and is favored by fragmen tation of the polymer chain. The unwinding temperature, the macrochain fragmentation temperature, and the cyclization rate depend on the mol ecular mass of the polymer.