A Caltech Library Service

Innovative synthetic rubbers via ruthenium catalyst systems

Tuba, Robert and Grubbs, Robert H. (2013) Innovative synthetic rubbers via ruthenium catalyst systems. In: 246th ACS National Meeting & Exposition, Sept. 8-12, 2013, Indianapolis, IN.

Full text is not posted in this repository. Consult Related URLs below.

Use this Persistent URL to link to this item:


The trans-polypentenamer has unique relevance among the synthetic rubbers since it has similar phys. properties to the natural rubber. The polypentenamer additives have propitious effect on the tire properties and have been studied extensively for this application. Polypentenamer synthetic rubber was synthesized by ringopening metathesis polymn. (ROMP) using ruthenium catalyst systems. It was found that the cyclopentene conversion does not depend on the catalyst activity and catalyst loading. However the applied reaction temp. has a significant impact on the polymn. yield. Equil. of growing chain and monomer was obsd. and the thermodn. parameters were detd. as: ΔH = - 5.6 kcal · mol^(-1); ΔS = -18.5 cal · mol^(-1)· K^(-1). The effect of cyclopentene ring substituents on the equil. was also investigated by exptl. and computational methods. The calcd. and exptl. detd. activation parameters of the synthetic rubbers made from different substituted cyclopentene derivs. are being detd. This unique feature of the equil. polymn. opens a way for the synthesis of durable, environmentally friendly elastomers where tires can be not only synthesized by the transition metal catalyst systems but the used tires can be readily decompd. by the same way and the recovered monomers can be easily recycled. Figure 1. Ruthenium catalyzed ring-opening metathesis polymn. (ROMP) of cyclopentene.

Item Type:Conference or Workshop Item (Paper)
Related URLs:
URLURL TypeDescription Website
Grubbs, Robert H.0000-0002-0057-7817
Additional Information:© 2013 American Chemical Society.
Record Number:CaltechAUTHORS:20140213-133807254
Persistent URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:43817
Deposited By: Tony Diaz
Deposited On:25 Mar 2014 17:36
Last Modified:03 Oct 2019 06:11

Repository Staff Only: item control page