作者:Markus Griesser、Arnulf Rosspeintner、Claudia Dworak、Michael Höfer、Gottfried Grabner、Robert Liska、Georg Gescheidt
DOI:10.1021/ma301959n
日期:2012.11.13
photoinitiators (PIs) for radical polymerization of acrylates show only poor photoreactivity because of the undesired effect of back electron transfer. To overcome this limitation, PIs consisting of a benzaldoxime ester and various sensitizers based on aromatic ketones were introduced. The core of the photoinduced reactivity was established by laser flash photolysis, photo-CIDNP, and EPR experiments at short
由于背电子转移的不良影响,用于丙烯酸酯自由基聚合的典型双分子光引发剂 (PI) 仅显示出较差的光反应性。为了克服这一限制,引入了由苯甲醛肟酯和各种基于芳香酮的敏化剂组成的 PI。光致反应的核心是通过激光闪光光解、光 CIDNP 和短时间尺度的 EPR 实验建立的。根据这些结果,最初形成的亚胺基不是特别活跃。聚合主要由以 C 为中心的自由基引发。Photo-DSC 实验显示的反应性可与经典的单分子 I 型 PI 相媲美,如 Darocur 1173。