TRIPLET ENERGY MIGRATION IN POLYMER PHOTOCHEMISTRY - MODEL FOR THE PHOTODEGRADATION OF POLY(PHENYL VINYL KETONE) IN SOLUTION

被引：32

作者：

ENCINAS, MV ^{[1
]}

FUNABASHI, K ^{[1
]}

SCAIANO, JC ^{[1
]}

机构：

[1] UNIV NOTRE DAME,RADIAT LAB,NOTRE DAME,IN 46556

来源：

MACROMOLECULES | 1979年 / 12卷 / 06期

关键词：

D O I：

10.1021/ma60072a031

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Plots of the progress of the degradation of poly(phenyl vinyl ketone) as a function of irradiation time are nonlinear; the effect is the result of triplet quenching by unsaturated end groups generated in the reaction. The process is intramolecular, and from a study of polymers of different initial chain length and application of random walk theory for a one-dimensional lattice it is possible to determine the frequency of triplet energy hopping; the value obtained was ~1 × 1012 s-1 at 30 °C in benzene. Poly(phenyl vinyl ketone) has a critical chain length of 750 units, this being the average number of chromophores “visited” by the excitation during the triplet lifetime. © 1979, American Chemical Society. All rights reserved.

引用

页码：1167 / 1176

页数：10

共 57 条

[1] SINGLET ENERGY-TRANSFER IN A 1-NAPHTHYL METHACRYLATE-9-VINYLANTHRACENE COPOLYMER [J].