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Ring‐opening metathesis polymerization (ROMP) of norbornene in supercritical carbon dioxide using well‐defined metal carbene catalysts
Author(s) -
Hu Xiaochuan,
Blanda Michael T.,
Venumbaka Sreenu R.,
Cassidy Patrick E.
Publication year - 2005
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.551
Subject(s) - romp , norbornene , carbene , metathesis , ring opening metathesis polymerisation , supercritical carbon dioxide , polymer chemistry , polymerization , catalysis , molar mass distribution , metal , ring opening polymerization , polymer , materials science , supercritical fluid , organic chemistry , chemistry
Ring‐opening metathesis polymerization (ROMP) of bicyclo[2,2,1]hept‐2‐ene (norbornene) has been effected in supercritical carbon dioxide (SC CO 2 ) with two types of metal carbene catalysts. It has been found that the polynorbornenes prepared in SC CO 2 are similar in molecular weight, molecular weight distribution and thermal stability to their counterparts prepared in tetrahydrofuran (THF). More important, the trans / cis 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 trans / cis ratio of the polymer. Copyright © 2005 John Wiley & Sons, Ltd.