Influence of nanodiamond on network structure of NR/SBRrubber blend

Nanodiamond as an emerging carbon based nanoparticle possess superior properties of bulk diamond including hardness and Young’smodulus, high thermal conductivity and chemical stability which are delivered at nanoscale. These properties combined with the largesurface area, stability of diamond core and reactive outer shell, makes nanodiamond an excellent candidate to use as filler material inpolymeric and elastomeric composites. In this study to investigate reinforcing mechanism of nanodiamond in elastomeric materials, thenetwork structure of natural rubber (NR) and styrene-butadiene rubber (SBR) blend was studied. Tube model theory is applied on stress-strainmeasurements to extract valuable information about the network structure of rubber including chemical crosslinks and physicalentanglements. Results showed that upon incorporation of ND rubber network has been altered significantly through increment in bothchemical and physical crosslinks. It is especially due to the rubber-filler interactions through strong linkages between functional groups on NDsurface and rubber chains which leads to improvement in mechanical strength of rubber vulcanizate.

کلیدواژه ها:

Rubber network ، nanodiamond ، crosslinks ، entanglements ، tube model