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Published May 30, 2013 | Supplemental Material + Published
Journal Article Open

Ruthenium catalyzed equilibrium ring-opening metathesis polymerization of cyclopentene


Polypentenamer was synthetized by equilibrium ring-opening metathesis polymerization (ROMP) using well-defined ruthenium catalyst systems. It was found that the equilibrium time is influenced by the catalyst loading or the catalyst activity, however as expected, the overall cyclopentene conversion is determined only by the applied reaction temperature. Equilibrium of the growing chain and monomer was observed and the activation enthalpy and entropy were determined as: ΔH = −5.6 kcal mol^(−1); ΔS = −18.5 cal mol^(−1) K^(−1). So far these values are the lowest which are reported for cyclopentene polymerization catalyst systems. This unique feature of the equilibrium polymerization opens a way for the synthesis of durable, environmentally friendly elastomers where tires can be not only synthetized but also readily recycled by the same transition metal catalyst system.

Additional Information

© 2013 The Royal Society of Chemistry. Received 8th May 2013; Accepted 29th May 2013. First published online 30 May 2013. We thank Texas A&M University at Qatar for financial support.

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Published - c3py00584d.pdf

Supplemental Material - c3py00584d_si.pdf


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