CO VULCANISATION

Vulcanised SBR/EPDM diblends were quantitatively characterised by solid-state 13C NMR spectroscopy. The SBR/EPDM blend ratio can be determined as well as the czs-1,4, transit and vinyl-1,2 butadienes and styrene ratios in the SBR and the ethylene and propylene contents in the EPDM. No evidence for homo- and co-vulcanisation has been obtained in these systems. No evidences are found for the change in cisitrans ratio in the SBR upon the vulcanisation [52],... 

Interesting radioelectric properties have been discovered with this class of materials either from the point of view of level of radioelectric properties (typical values can attain 15-30 at 4 GHz) or under the form of absorption properties, since these films can be assembled by co-vulcanisation (especially in the case of polychoropene based films). In that case, they lead to flexible absorbing sheets which present levels of attenuation of [10] dB between 5 and 18 GHz by covulcanisation of different layers in order to produce a conductivity gradient [180]. 

Low-cost flame retardant Polymerise during cure High-temperature plasticisers High-temperature plasticisers Co-vulcanise with the rubber... 

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