STABILITY OF UV VISIBLE TRANSMISSION SPECTRA OF CROSS-LINKED POLY(METHYLPHENYLSILOXANE) AFTER GAMMA-IRRADIATION - A NOTE

Authors
HARMON JP TAYLOR AG SCHUENEMAN GT GOLDBERG EP
Citation
Jp. Harmon et al., STABILITY OF UV VISIBLE TRANSMISSION SPECTRA OF CROSS-LINKED POLY(METHYLPHENYLSILOXANE) AFTER GAMMA-IRRADIATION - A NOTE, Polymer degradation and stability, 41(3), 1993, pp. 319-322
Citations number
13
Categorie Soggetti
Polymer Sciences
Journal title
Polymer degradation and stability → ACNP
ISSN journal
01413910
Volume
41
Issue
3
Year of publication
1993
Pages
319 - 322
Database
ISI
SICI code
0141-3910(1993)41:3<319:SOUVTS>2.0.ZU;2-S
Abstract
Gamma irradiation is known to induce a bathochromic shift in the UV/vi sible transmission spectra of glassy polymers. This shift, which is of ten primarily due to formation of free radical color centers, can decr ease, or anneal with time after irradiation. The effect of aging on th e UV/visible spectra of silicone elastomer, poly(methylphenylsiloxane) (PMPS), was compared to that of a glassy polymer, poly(benzyl methacr ylate) (PBMA). Radiation induced a slight, initial, bathochromic shift in the transmission spectra of the elastomers. This shift became more pronounced after aging for one year. In contrast, PBMA exhibited a pr onounced, initial bathochromic shift upon irradiation which diminished considerably after aging for one year.