Polar synthetic rubber blends

Natural Rubber Based Non-Polar Synthetic Rubber Blends... 

The susceptibility of NR based polar synthetic rubber blends to preparation methods and protocols makes the use of testing procedures able to detect and monitor the characteristics of these blend structures imperative. Thus, a vast spectrum of test methods is used to measure properties of both the uncured stocks and the vulcanizates. ... 

Natural Rubber Based Polar Synthetic Rubber Blends 219... 

A prerequisite for delivering useful products made from NR based polar synthetic rubber blends is appropriate curing.Vulcanization of mixtures comprising such dissimilar elastomers is affected by the interfacial area of the blend, the differential solubility and reactivity of the vulcanization agents, as well as the curative diffusion between the rubber zones.There are several vulcanization formulations for such blends, but the correct selection of curing recipe is key in obtaining the desirable crosslink densities of the related rubber phases. In this respect, the essential crosslinking characteristic is the ability of the two elastomers to co-vulcanize. ... 

An important aspect defining the mechanical behaviour of NR based polar synthetic rubber blend vulcanizates is the mechanical response of the individual components and the interphase involved, influenced by the curative (and filler) distribution. The synergetic action of the blend phases escalates the ability of... 

The thermal properties of NR based polar synthetic rubber blends is expected to affect the application range of these vulcanizates. Degradation, glass transition and crystallization temperatures determine the service conditions of each blend. Additionally, the existence of single or multiple shifted or not glass transition temperatures of each blend supplies evidence for the miscibility of the components involved. " Nevertheless, in many cases further analysis might be required to determine miscibility. 

---