title: Thermal properties of ruthenium alkylidene-polymerized dicyclopentadiene.
abstract: Differential scanning calorimetry (DSC) analysis of ring opening methatesis polymerization (ROMP) derived polydicyclopentadiene (PDCPD) revealed an unexpected thermal behavior. A recurring exothermic signal can be observed in the DSC analysis after an elapsed time period. This exothermic signal was found to be proportional to the resting period and was accompanied by a constant increase in the glass-transition temperature. We hypothesize that a relaxation mechanism within the cross-linked scaffold, together with a long-lived stable ruthenium alkylidene species are responsible for the observed phenomenon.
authors.affiliation: Department of Chemistry, Ben-Gurion University of the Negev Beer Sheva-84105, Israel.
authors.forename: Yuval
authors.initials: Y
authors.lastname: Vidavsky
authors.affiliation: Department of Chemical Engineering, Ben-Gurion University of the Negev Beer Sheva-84105, Israel.
authors.forename: Yotam
authors.initials: Y
authors.lastname: Navon
authors.affiliation: Department of Chemistry, Ben-Gurion University of the Negev Beer Sheva-84105, Israel.
authors.forename: Yakov
authors.initials: Y
authors.lastname: Ginzburg
authors.affiliation: Department of Chemical Engineering, Ben-Gurion University of the Negev Beer Sheva-84105, Israel.
authors.forename: Moshe
authors.initials: M
authors.lastname: Gottlieb
authors.affiliation: Department of Chemistry, Ben-Gurion University of the Negev Beer Sheva-84105, Israel.
authors.forename: N Gabriel
authors.initials: NG
authors.lastname: Lemcoff
keywords: glass-transition temperature; polydicyclopentadiene; ring opening metathesis polymerization; ruthenium-catalyzed olefin metathesis; thermoset polymers