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Selective hydrogenation of nitrile‐butadiene rubber catalyzed by thermoregulated phase transfer phosphine rhodium complex
Author(s) -
Ning Simin,
Yang Shoufa,
Wei Xinpeng,
Wang Weimin,
Zhang Liqun,
Yue Dongmei
Publication year - 2011
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.34558
Subject(s) - nitrile , catalysis , natural rubber , rhodium , nitrile rubber , transfer hydrogenation , materials science , polymer chemistry , yield (engineering) , double bond , phosphine , phase (matter) , chemistry , nuclear chemistry , organic chemistry , composite material , ruthenium
Hydrogenation of polymer having CC double bond can be carried out with the metal–organic complex as catalyst, which has the property of themoregulated phase transfer. In this study, a new complex RhCl[PPh[(OCH 2 CH 2 ) 5≤ n ≤6 CH 3 ] 2 ] 3 (Rh/AEOPP) was synthesized with a good yield, which was further used as catalyst to selectively hydrogenated nitrile‐butadiene rubber (HNBR). This is the first time that Rh/AEOPP complex was synthesized and applied in nitrile‐butadiene rubber (NBR) hydrogenation. The result shows that hydrogenation degree of product (HNBR) can be extended to 90%, when the condition is [Cat] = 3% (based the weight of NBR), L 2 : Cat (Weight Ratio) = 2, [NBR] = 5% (based on the weight of xylene solution), P (H 2 ) = 1.5 MPa, T = 155°C, and t = 8 h. Also, by adjusting temperature, the catalyst could be easily separated from products with 89% catalyst complex recovery. In addition, 1 H‐NMR and infrared (IR) spectra showed that CC double bonds in NBR was successfully hydrogenated without causing reduction of the CN group. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011