✦ LIBER ✦

Radiation degradation of epoxidized natural rubber studied by solid-state nuclear magnetic resonance and infrared spectroscopy

✍ Scribed by M C Senake Perera

Publisher: John Wiley and Sons
Year: 2000
Tongue: English
Weight: 126 KB
Volume: 49
Category: Article
ISSN: 0959-8103
DOI: 10.1002/1097-0126(200007)49:7<691::aid-pi440>3.0.co;2-#

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✦ Synopsis

The mechanism of radiation-induced structural changes in epoxidized natural rubber was investigated using nuclear magnetic resonance (NMR) and Fourier transform infrared (FTIR) spectroscopy. Samples were irradiated both under vacuum and in air. Because the rubbers crosslinked during irradiation, solid-state NMR had to be used. The cross polarized/magic angle spinning NMR spectra were used to calculate the radiation yields. Ring opening of the epoxy groups was found to occur during irradiation. Most of the crosslinking was due to epoxy group ring opening, and very little or no CÐC crosslinking was observed.

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