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Rheokinetics of ring‐opening metathesis polymerization of norbornene‐based monomers intended for self‐healing applications
Author(s) -
Larin G. E.,
Bernklau N.,
Kessler M. R.,
DiCesare J. C.
Publication year - 2006
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.20655
Subject(s) - dicyclopentadiene , norbornene , polymerization , ring opening metathesis polymerisation , monomer , materials science , polymer chemistry , grubbs' catalyst , kinetics , self healing material , ring opening polymerization , metathesis , bulk polymerization , radical polymerization , composite material , polymer , self healing , medicine , physics , alternative medicine , pathology , quantum mechanics
Constant shear rate rheokinetics was used to evaluate the polymerization of four norbornene‐based monomer systems as candidate healing agents in self‐healing composites: endo ‐dicyclopentadiene ( endo ‐DCPD), exo ‐DCPD, 5‐ethylidene‐2‐norbornene (ENB), and a 1:1 volume mixture of endo ‐DCPD:ENB. The ruthenium catalyst induced ring‐opening metathesis polymerization of the healing agent candidates were measured experimentally under isothermal conditions while the influences of several different variables were considered (e.g., test temperature, catalyst concentration, catalyst form). Analyzing the increase in viscosity during the polymerization, comparisons of the reaction kinetics of the different monomers were quantified by defining two parameters, t t and Δ t , which correspond to the polymerization initiation and propagation rates respectively. Generally, ENB shows the fastest polymerization kinetics, and endo ‐DCPD the slowest. POLYM. ENG. SCI. 46:1804–1811, 2006. © 2006 Society of Plastics Engineers