Dr. Bharat P Kapgate

• Ph.D (Rubber Chemistry and Technology), M. Sc (Organic Chemistry)
• Research Officer at Indian Rubber Manufacturers Research Association

Nano silica is grown, in-situ, in natural rubber (NR)/chloroprene rubber (CR) blends, by soaking sol-gel method. Much better silica dispersion in the rubber blends is achieved following this technique in comparison to the rubber blends with externally filled silica at same filler loading and same blend composition. This leads to significant improve...

Chloroprene rubber (CR) composites, embedded with well dispersed zirconia within the matrix, are produced that combine the superior reinforcement of zirconia with the other useful composite properties. The in situ incorporated zirconia offers an outstanding reinforcement effect in comparison to externally filled zirconia at the same filler content....

Itaconic acid has been employed as a special facilitator to construct divalent metal ion based ionic crosslinking framework in the acrylonitrile butadiene rubber matrix. Readily accessible double bonds in itaconic acid could directly react with the elastomer to form effective covalent bonds. On the other hand, presence of easily dissociable protons...

Potential of crystalline nanocellulose (CNC), as green reinforcing filler, has been evaluated for the preparation of natural rubber (NR) composites. CNC is derived from a natural source (ramie fiber) and its surface is modified with different organosilanes to strengthen the rubber‐filler interaction at the interface. It is found that, although at 2...

Zirconia particles are generated into a nitrile rubber (NBR) matrix via a solution sol–gel method in a controlled manner. Formation of zirconia particles from their precursor (zirconium(IV) propoxide) occurs under optimized reaction conditions. As a result, the nanoparticles are embedded and well dispersed in the NBR matrix that results in a remark...

The administration of worn tires might be a worry in industrialized nations. The apparatus of morsel elastic as light-weight mix in bond principally based materials might be an unpracticed different for reusing this material. High substitutions of normal sand by morsel elastic were concentrated partner degreed an air-entraining specialist was used...

Concrete is considered the most commonly used building material. The significant exploitation of crumb rubber waste in concrete. Reductions in strength comparatively high unevenness in durability performance are major factors preventing in concrete. This research focused on using crumb tire rubber as partial replacement of fine aggregate mixed with...

Concrete is globally recognized for its long term service period in the application of concrete. In the region of five billion tons of concrete are utilized more or less in the planet and increasing every year. In view of the environmental problems faced today considering the fast reduction of natural resources like sand and aggregate. Owing to the...

The interaction between tire rubber and pavement surface depends upon their surface characteristics and physical properties. Presence of water on the pavement surface aggravates the interaction and decreases the skid resistance drastically. Due to the interfacial water, the real contact area between pavement and tire decreases, which leads to decre...

Titania nanoparticles are introduced in situ into SSBR matrix (solution of styrene butadiene rubber) by solution sol-gel method under controlled reaction condition that shows outstanding reinforcing efficiency because of its favourable morphological features and enhanced polymer-filler interaction. Surface treatment of titania particles in reactive...

Functionalization of non-polar ethylene propylene diene monomer (EPDM) rubber by melt grafting of maleic anhydride (MA) and in situ incorporation of sol–gel derived silica in the MA grafted EPDM has been done to prepare EPDM/silica composites to use dual benefits of both the approaches, which results in adequate rubber–filler compatibility, good fi...

This work reports the use of bio-based lignin as an antioxidant in nitrile rubber compounds as a sole or partial replacement of synthetic ones. Antioxidant is used in rubber products to protect it from the attack of oxygen, ozone, mechanical shear, metals, light, fatigue etc. We have investigated the effect of two different synthetic antioxidants a...

Remarkable improvement in mechanical properties of acrylonitrile butadiene rubber (NBR) composites is achieved by incorporating nano-titania that is synthesised in solution of the raw rubber using titanium n-butoxide (TNB) as the titania precursor. This is achieved by designed and controlled incorporation of titania that resulted in very good dispe...

Controlled growth of in situ silica, into natural rubber (NR)/nitrile rubber (NBR) blend (40/60 composition by weight) following solution sol–gel method, results in a coherent blend morphology with enhanced composite properties. Similar composites, i.e., in situ silica-filled NR/NBR blend (40/60 by weight), showed better mechanical properties than...

Nano silica is generated in situ inside the uncrosslinked chloroprene rubber (CR) by the sol-gel reaction of tetraethoxysilane (TEOS). This results in appreciable improvement in mechanical properties of the CR composites at relatively low filler content. Furthermore, exploitation of reactive organosilanes, γ-aminopropyltrimethoxysilane (γ-APS) in p...

This chapter is intended to give an overview of electrical conductivity and dielectric properties of chloroprene rubber (CR) composites with reference to their application in the field of electronics. Influence of different types of filler on the dielectric properties of the CR composites, in a wide frequency range and varying temperature condition...

Silica is grown, in situ into natural rubber (NR) /chloroprene rubber (CR) blend (at 40/60 ratio), by solution sol-gel method, where silica content in rubber blend is increased in a controlled manner exceeding the limit found for the same blend ratio, in soaking sol-gel method. Reaction conditions have been optimized to get adequate conversion of t...

Nitrile rubber/silica composites are prepared by a sol–gel process using tetraethoxysilane as precursor in the presence of γ-mercaptopropyltrimethoxysilane as a silane coupling agent. Here, we follow a novel processing route where the silica particles are generated inside the rubber matrix before compounding with vulcanizing ingredients. The effect...

The effects of surface modification on the filler–filler and rubber–filler interactions in silica-filled nitrile rubber composites have been studied. Nitrile rubber composites are prepared with untreated stöber silica, organosilane-treated stöber silica and externally added precipitated silica along with organosilane. Morphological studies show bet...

Role of silane-treated st ¨ober silica as reinforcing filler for nitrile rubber (NBR) has been studied. St ¨ober silica is synthesized by sol–gel method, and the surface of silica is modified with the treatment of silane-coupling agent viz. g-mercaptopropyltrimethoxysilane (g-MPS) in varying proportions. Average particle size of st ¨ober silica of...

Nitrile rubber-silica composites are prepared with sol-gel derived in situ silica and externally added precipitated silica at same filler loading. In both the cases silane coupling agent is used as surface modifier. A comparative study of the filled composites is done along with unfilled rubber composite in terms of morphology, curing characteristi...

Silica particles were generated and grown in situ by sol–gel method into rubber blends comprised of natural rubber (NR) and acrylonitrile butadiene rubber (NBR) at various blend ratios. Silica formed into rubber matrix was amorphous in nature. Amount of in situ silica increased with increase in natural rubber proportion in the blends during the sol...

Rubber silica nanocomposites are prepared by mixing nitrile rubber (NBR) with surface modified silica nano particles. Silica nano particles are synthesized by sol-gel method that involves hydrolysis followed by condensation of tetraethyl orthosilicate (TEOS). Surface modification of silica particles is done with the treatment of silane coupling age...