KINETICS OF FREE-RADICAL DECAY REACTIONS IN LACTIC-ACID HOMOPOLYMERS AND COPOLYMERS IRRADIATED TO STERILIZATION DOSE

被引：5

作者：

KANTOGLU, O ^{[1
]}

OZBEY, T ^{[1
]}

GUVEN, O ^{[1
]}

机构：

[1] HACETTEPE UNIV,DEPT ENGN PHYS,ANKARA 06532,TURKEY

来源：

RADIATION PHYSICS AND CHEMISTRY | 1995年 / 46卷 / 4-6期

关键词：

POLY(LACTIC ACID); POLY(LACTIC/GLYCOLIC ACID); ESR; STERILIZATION DOSE; DECAY KINETICS;

D O I：

10.1016/0969-806X(95)00273-Z

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The kinetics of flee radical decay reactions of poly(L-Lactic acid), poly(DL-Lactic acid) and random copolymer of lactic and glycolic acid have been investigated for decays taking place in air and in vacuum. The change in ESR lines of gamma-irradiated polymers have been followed over a long time period. The decay has been found to follow neither simple first-order nor second-order kinetics. Various kinetic approaches including composite first or second-order mechanisms and diffusion-controlled first or second-order equations were determined to be also unsatisfactory. The decay of radicals in bulk irradiated lactic acid homo and copolymers was found to be best described when the second-order non-classical equation with time dependent rate constant approach was used.

引用

页码：837 / 841

页数：5

共 11 条

[1] KINETICS OF FREE-RADICAL DECAY REACTIONS IN POLYMERIC SOLIDS [J].