Premium
Application of Real Time FTIR and MAS NMR Spectroscopy to the Characterization of UV/EB Cured Epoxidized Natural Rubber Blends
Author(s) -
Kumar Ramamurti N.,
Mehnert Reiner,
Scherzer Tom,
Bauer Frank
Publication year - 2001
Publication title -
macromolecular materials and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 96
eISSN - 1439-2054
pISSN - 1438-7492
DOI - 10.1002/1439-2054(20011001)286:10<598::aid-mame598>3.0.co;2-r
Subject(s) - materials science , glycidyl methacrylate , epoxy , natural rubber , fourier transform infrared spectroscopy , curing (chemistry) , cationic polymerization , photoinitiator , methacrylate , polymer chemistry , reactivity (psychology) , double bond , uv curing , dynamic mechanical analysis , composite material , polymer , chemical engineering , polymerization , engineering , medicine , alternative medicine , monomer , pathology
The UV curing of blends consisting of epoxidized natural rubber (ENR), cycloaliphatic diepoxide (ECC) and glycidyl methacrylate (GMA) induced by cationic photoinitiator was studied by real time FTIR. This technique revealed the individual reactivity of epoxy groups and double bonds under UV exposure and thermal postcuring. The epoxy groups of ECC reacted more rapidly compared to those of ENR and GMA. In addition, 13 C CP MAS NMR showed that acrylic double bonds of GMA are more reactive than isoprenic ones of ENR under EB exposure. It is assumed that only few linkages exist between the diepoxide and the methacrylate interpenetrating network via GMA molecules. The stable embedding of ENR particles via chemical bonds causes toughening of the epoxy matrix while maintaining a desired hardness.