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A “green” technique for high performance elastomers – fundamental investigation for hydrogenation of nitrile butadiene rubber in supercritical carbon dioxide
Author(s) -
Rempel Garry L.,
Li Guanghui,
Pan Qinmin,
Ng Flora T.T.
Publication year - 2002
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/1521-3900(200208)186:1<23::aid-masy23>3.0.co;2-s
Subject(s) - supercritical carbon dioxide , supercritical fluid , catalysis , elastomer , nitrile , natural rubber , nitrile rubber , hydrogen , materials science , carbon dioxide , volume (thermodynamics) , decomposition , chemical engineering , catalytic hydrogenation , organic chemistry , chemistry , composite material , thermodynamics , physics , engineering
NBR hydrogenation, catalyzed by OsHCl(CO)(O 2 )(PCy 3 ) 2 is investigated in supercritical carbon dioxide (SC‐CO 2 ). The experiments were carried out in a volume‐changeable SFT Phase Monitor with a view window. It was found that the catalyst could maintain steady activity in SC‐CO 2 for a long time and no deactivation or decomposition of the catalyst was observed during the experimental operation periods. The reaction reached a conversion of 98% within 2.5 hours at 150°C. Increasing the temperature, specific area of NBR, CO 2 density and catalyst concentration favours higher hydrogenation degree, but the effect of hydrogen pressure is complicated and attention must be given to find the optimal hydrogen pressure. The results suggest that NBR hydrogenation could be possibly realized in SCFs in place of conventional organic solvents.