SPECTROPHOTOMETRIC DETERMINATION OF THERMAL TRANSITION OF POLYMERIC SYSTEMS USING PHOTOCHROMIC PROBES

Authors
NAYAK B GUPTA SN
Citation
B. Nayak et Sn. Gupta, SPECTROPHOTOMETRIC DETERMINATION OF THERMAL TRANSITION OF POLYMERIC SYSTEMS USING PHOTOCHROMIC PROBES, Journal of polymer science. Part A, Polymer chemistry, 33(6), 1995, pp. 891-900
Citations number
44
Categorie Soggetti
Polymer Sciences
Journal title
Journal of polymer science. Part A, Polymer chemistry → ACNP
ISSN journal
0887624X
Volume
33
Issue
6
Year of publication
1995
Pages
891 - 900
Database
ISI
SICI code
0887-624X(1995)33:6<891:SDOTTO>2.0.ZU;2-6
Abstract
Mercury-dithizone complex both free and bonded to a polymeric system h as been synthesized and used to measure the thermal transition of poly styrene, poly(vinyl acetate), and some other polymers. The thermal rel axation rate of the activated complex in dark has been found to be dep endent on the free volume of a polymer matrix. The rate goes through a maximum above T-g of a polymer. A very sensitive method, based on the rmal recovery of activated photochromic probe chromophore has been dev ised to measure the thermal transition of both single and multicompone nt polymer matrices. (C) 1995 John Wiley and Sons, Inc.