Electron-beam curing of epoxy resins: effect of alcohols on cationic polymerization

Bulletin of materials science

G R Palmese¹  N N Ghosh² 

[1] Department of Chemical Engineering, Drexel University, USA$$Department of Chemical Engineering, Drexel University, USADepartment of Chemical Engineering, Drexel University, USA$$;Chemistry Group, Birla Institute of Technology and Science, Pilani (Goa Campus), Zuarinagar, Goa 403 726, India$$Chemistry Group, Birla Institute of Technology and Science, Pilani (Goa Campus), Zuarinagar, Goa 403 726, IndiaChemistry Group, Birla Institute of Technology and Science, Pilani (Goa Campus), Zuarinagar, Goa 403 726, India$$

关键词: E-beam;    cationic polymerization;    epoxy resin;    size exclusion chromatogram.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

Electron-beam (e-beam) induced polymerization of epoxy resins proceeds via cationic mechanism in presence of suitable photoinitiator. Despite good thermal properties and significant processing advantages, epoxy-based composites manufactured using e-beam curing suffer from low compressive strength, poor interlaminar shear strength, and low fracture toughness. A detailed understanding of the reaction mechanism involving e-beam induced polymerization is required to properly address the shortcomings associated with ebeam curable resin systems. This work investigated the effect of hydroxyl containing materials on the reaction mechanism of e-beam induced cationic polymerization of phenyl glycidyl ether (PGE). The alcohols were found to play important roles in polymerization. Compared to hydroxyl group of aliphatic alcohol, phenolic hydroxyl group is significantly less reactive with the oxonium active centre, generated during e-beam induced polymerization of epoxy resin system.

【 授权许可】

Unknown