WAVELENGTH EFFECT ON THE ACCELERATED PHOTODEGRADATION OF POLYMETHYLMETHACRYLATE

Authors
TORIKAI A HASEGAWA H
Citation
A. Torikai et H. Hasegawa, WAVELENGTH EFFECT ON THE ACCELERATED PHOTODEGRADATION OF POLYMETHYLMETHACRYLATE, Polymer degradation and stability, 61(2), 1998, pp. 361-364
Citations number
6
Categorie Soggetti
Polymer Sciences
Journal title
Polymer degradation and stability → ACNP
ISSN journal
01413910
Volume
61
Issue
2
Year of publication
1998
Pages
361 - 364
Database
ISI
SICI code
0141-3910(1998)61:2<361:WEOTAP>2.0.ZU;2-U
Abstract
The wavelength sensitivity of photodegradation of polymethylmethacryla te (PMMA) in the presence of beta-carotene was studied by optical abso rption and GPC measurements. Main-chain scission without gel formation was observed. It was found that main-chain scission of PMMA was accel erated by the addition of beta-carotene. The threshold wavelength for main-chain scission of PMMA containing beta-carotene shifted to a long er wavelength (400 nm) compared to that of PMMA with no additive (320n m). (C) 1998 Elsevier Science Limited. All rights reserved.