Properties of a Trans-1,5-Polypentenamer Produced by Polymerization through Ring Cleavage of Cyclopentene

Trans-1,5-polypentenamer can be produced with a high degree of uniformity by solution polymerization using complex catalysts of the Ziegler/Natta type. The state of order of the polymer indicates a rubber with good low temperature properties and crystallization behavior similar to that of natural rubber. There is therefore a fundamental difference between this material and other synthetic rubbers of the general purpose type. Trans-1,5-polypentenamer is easy to process, can be heavily loaded, and is therefore inexpensive to compound. Even when small amounts of the crosslinking agents are used, a high cross-linking yield is obtained and this makes it possible to produce vulcanizates that are resistant to dynamical stresses. As high green strength and good tack are present simultaneously, the material is suitable for use in the tire industry, particularly in carcass production.