The branched chain structures of im-ported natural rubber RSS-1 and isoprene rubber molecular chains were compared and analyzed by nuclear magnetic resonance spectrometer.The re-sults showed that the molar fraction of epoxy group in the branched chain structure of the RSS-1 molecular chain was 0.02%,the hydroxyl group was 0.16%,and the 3,4-isoprene unit was 0.20%.The branched chain structure of isoprene rubber molecular chain did not contain epoxy groups and hydroxyl groups,and the molar fraction of 3,4-isoprene units was 0.94%.
关键词
天然橡胶/异戊橡胶/核磁共振波谱/支链结构
Key words
natural rubber/isoprene rubber/nu-clear magnetic resonance spectroscopy/branched chain structure