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Photoluminescence study of β relaxation of polyethylene blends
Author(s) -
MartinsFranchetti S. M.,
Atvars T. D. Z.
Publication year - 1993
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1993.070500913
Subject(s) - anthracene , relaxation (psychology) , photoluminescence , low density polyethylene , polyethylene , materials science , polymer , high density polyethylene , excited state , singlet state , molecule , activation energy , polymer chemistry , chemical physics , chemistry , photochemistry , composite material , organic chemistry , atomic physics , physics , optoelectronics , psychology , social psychology
Secondary β relaxation of polyethylene blends (50/50 HDPE/LDPE) were studied by photoluminescence of anthracene molecules dissolved in the polymer bulk. The temperature of the β relaxation has been determined as T β = −40°C by the dependence of the ratio of vibronic components of the fluorescence band on the temperature. The molecular mechanism of this relaxation has been discussed considering the possibility of the energy migration involving anthracene molecules in the singlet electronic excited and ground states. © 1993 John Wiley & Sons, Inc.