THE EFFECT OF DIBUTYL PHTHALATE (DBP) PLASTICIZER ON THE STABILITY OFOPTICAL-PROPERTIES OF POLYSTYRENE (PS) AFTER EXPOSURE TO GAMMA-RADIATION

Authors
TAYLOR AG HARMON JP
Citation
Ag. Taylor et Jp. Harmon, THE EFFECT OF DIBUTYL PHTHALATE (DBP) PLASTICIZER ON THE STABILITY OFOPTICAL-PROPERTIES OF POLYSTYRENE (PS) AFTER EXPOSURE TO GAMMA-RADIATION, Polymer degradation and stability, 41(1), 1993, pp. 9-15
Citations number
16
Categorie Soggetti
Polymer Sciences
Journal title
Polymer degradation and stability → ACNP
ISSN journal
01413910
Volume
41
Issue
1
Year of publication
1993
Pages
9 - 15
Database
ISI
SICI code
0141-3910(1993)41:1<9:TEODP(>2.0.ZU;2-V
Abstract
The objective of this work was to study the effect of gamma radiation on the UV-visible transmission properties of PS/DBP solutions in the r ange containing 0-25wt% of DBP. Samples were prepared by bulk-polymeri zing styrene in the presence of DBP. Transmission spectra before and a t intervals after irradiation were characterized with a Hewlett-Packar d 8452A diode array spectrophotometer. Glass transition temperatures w ere determined by a Du Pont 2910 DSC. Radiation-induced losses in tran sparency decreased as the glass transition temperatures decreased. Gla ss transition temperatures were unchanged by irradiation. GPC studies were conducted in filtered samples using a Polymer Laboratories PL gel 10-mum mixed-bed column. Molecular-weight distributions were broad, b ut decreased after irradiation. Number-average molecular weights incre ased after irradiation. Radiation damage is discussed in terms of the effect of matrix mobility on recoverable losses in transparency.