Ring-opening metathesis polymerization (ROMP) of norbornene in supercritical carbon dioxide using well-defined metal carbene catalystst

Ring-opening metathesis polymerization (ROMP) of bicyclo[2,2,1]hept-2-ene (norbornene) has been effected in supercritical carbon dioxide (SC CO2) with two types of metal carbene catalysts. It has been found that the polynorbornenes prepared in SC CO2 are similar in molecular weight, molecular weight...

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Bibliographic Details
Published in:Polymers for advanced technologies 2005-02, Vol.16 (2-3), p.146-149
Main Authors: Hu, Xiaochuan, Blanda, Michael T, Venumbaka, Sreenu R, Cassidy, Patrick E
Format: Article
Language:English
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Summary:Ring-opening metathesis polymerization (ROMP) of bicyclo[2,2,1]hept-2-ene (norbornene) has been effected in supercritical carbon dioxide (SC CO2) with two types of metal carbene catalysts. It has been found that the polynorbornenes prepared in SC CO2 are similar in molecular weight, molecular weight distribution and thermal stability to their counterparts prepared in tetrahydrofuran (THF). More important, the translcis ratio of the resulting polymers could be adjusted by varying the amount of cosolvent THF or metal carbene catalysts. However, neither the reaction temperature nor pressure significantly influenced the translcis ratio of the polymer.
ISSN:1042-7147
DOI:10.1002/pat.551