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Metathesis hydrogenation of natural rubber latex

Paper ID Volume ID Publish Year Pages File Format Full-Text
41367 45886 2011 8 PDF Available
Title
Metathesis hydrogenation of natural rubber latex
Abstract

Metathesis hydrogenation of deproteinized natural rubber (NR) latex was studied using 2nd generation Grubbs catalyst. More than 97% hydrogenation was achieved under mild conditions and without organic solvent addition other than that used to dissolve the catalyst. The olefin conversion plot exhibited an S-curve characteristic which indicated the effect of competition between the metathesis reaction and the hydrogenation reaction. Molecular weight of NR dramatically changed along the reaction time in the first region due to the metathesis reaction and then slightly changed in the second region where the hydrogenation consumption plot obeyed a first-order kinetic model. The kinetic behavior of the hydrogenation region increased with an increase in catalyst concentration and hydrogen pressure. The results showed an inverse behavior with an increase in rubber concentration. The apparent activation energy over the temperature range of 80–96 °C for the hydrogenation of metathesized natural rubber was found to be approximately 169 kJ/mol.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (73 K)Download as PowerPoint slideHighlights► More than 97% hydrogenation was achieved. ► Olefin conversion plot exhibited an S-curve characteristic. ► Proposes the catalytic cycle for hydrogenation of metathesized natural rubber. ► Superior thermal stability hydrogenated product.

Keywords
Metathesis; Hydrogenation; Natural rubber; Grubbs's catalyst; Catalytic mechanism
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 405, Issues 1–2, 3 October 2011, Pages 129–136
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us