کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1398312 984356 2012 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Investigation of termination reactions in free radical photopolymerization of UV powder formulations
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Investigation of termination reactions in free radical photopolymerization of UV powder formulations
چکیده انگلیسی

The termination mechanisms occurring in a UV powder coating system during photopolymerization process are investigated and compared to a conventional acrylate monomer system. The influence of the photoinitiator concentration, viscosity and conversion percentage of the monomer are assessed leading to the study of curing kinetics of a UV powder urethane diacrylate based system. It is shown that termination occurs mainly by bimolecular termination (PRT). This mechanism is related to low reactive double bonds concentration and high photoinitiator concentration in the UV powder system. Moreover, the effect of surrounding atmosphere points out the role of the oxygen on polymerization mechanisms.

Figure optionsDownload as PowerPoint slideHighlights
► Conversion and photoinitiator concentration effect in photopolymerization.
► Termination reaction study in UV-powders photopolymerization.
► Temperature and environment effect on UV-powders termination mechanisms.
► Predominance of bimolecular type termination in UV-powders.
► Oxygen diffusion effect on UV-powders.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: European Polymer Journal - Volume 48, Issue 8, August 2012, Pages 1475–1484
نویسندگان
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