PHOTOPOLYMERIZATION OF MULTIFUNCTIONAL MONOMERS .6. INFLUENCE OF PHOTOSTABILIZERS

被引:11
作者
DECKER, C
MOUSSA, K
LEXUAN, H
机构
[1] Laboratoire de Photochimie Generale associe au CNRS Ecole Nationale Superieure de Chimie de Mulhouse, 68200 Mulhouse, 3, rue A. Werner
关键词
D O I
10.1016/0014-3057(91)90062-S
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Time-resolved i.r. spectroscopy was used to investigate the kinetics of the light-induced polymerization of a polyurethane-diacrylate in the presence of u.v. stabilizers and HALS (radical scavengers containing sterically hindered piperidine groups). Oxanilide and 2-hydroxy-phenylbenzotriazole u.v. absorbers were shown to retard the polymerization and to decrease the hardness of the polymer formed. The dependences of the induction period and the polymerization rate on the photostabilizer concentration were examined in the 0.5-2% range for the two types of u.v. absorbers. HALS radical scavengers show no inhibition effect on these radical-induced reactions. This failure is probably due to the fact that the polymerization can only develop in an essentially O2-free medium, which will prevent the formation of the highly reactive nitroxy radical.
引用
收藏
页码:1251 / 1260
页数:10
相关论文
共 34 条
[1]   PHOTO-OXIDATIVE STABILITY OF ELECTRON-BEAM AND UV-CURED SI-ACRYLATE AND TRIACRYLATE RESINS - INFLUENCE OF RESIN INITIATOR STRUCTURE [J].
ALLEN, NS ;
ROBINSON, PJ ;
WHITE, NJ ;
SKELHORNE, GG .
EUROPEAN POLYMER JOURNAL, 1984, 20 (01) :13-18
[2]   PHOTOSTABILIZATION AND PHOTODEGRADATION IN ORGANIC COATINGS CONTAINING A HINDERED AMINE LIGHT STABILIZER .5. INFRARED SPECTROSCOPIC MEASUREMENTS OF HINDERED AMINE EFFECTIVENESS [J].
BAUER, DR ;
GERLOCK, JL ;
MIELEWSKI, DF ;
PECK, MCP ;
CARTER, RO .
POLYMER DEGRADATION AND STABILITY, 1990, 28 (01) :39-51
[3]   PHOTODEGRADATION AND PHOTOSTABILIZATION IN ORGANIC COATINGS CONTAINING A HINDERED AMINE LIGHT STABILIZER .6. ESR MEASUREMENTS OF NITROXIDE KINETICS AND MECHANISM OF STABILIZATION [J].
BAUER, DR ;
GERLOCK, JL ;
MIELEWSKI, DF .
POLYMER DEGRADATION AND STABILITY, 1990, 28 (02) :115-129
[4]  
BAUER DR, 1988, IND ENG CHEM RES, V27, P67
[5]  
BENDAIKHA T, 1984, J RADIAT CURING, V11, P6
[6]  
BENDAIKHA T, 1986, THESIS MULHOUSE
[7]  
BERNER G, 1984, ORGANIC COATINGS, V7, P55
[8]  
BOHNKE H, 1989, FRABE LACK, V10, P715
[9]  
Carlsson D. J., 1979, DEV POLYM STABIL, P219
[10]   QUANTITATIVE-EVALUATION OF PHOTODEGRADATION IN COATINGS [J].
CROLL, SG .
PROGRESS IN ORGANIC COATINGS, 1987, 15 (03) :223-247