Morphology and Mechanical Properties of NBR/PVC Hybrid Nanocomposites
Subramanian N1, Senthilvel K2, Prabu B3

1Subramanian N*, Department of Mechanical Engineering, Pondicherry Engineering College, Puducherry, India.
2Senthilvel K, Department of Mechanical Engineering, Karaikal Polytechnic College, Karaikal, Pondicherry, India
3B.Prabu, Department of Mechanical Engineering, Pondicherry Engineering College, Puducherry, India. 

Manuscript received on May 18, 2020. | Revised Manuscript received on May 27, 2020. | Manuscript published on May 30, 2020. | PP: 2606-2611 | Volume-9 Issue-1, May 2020. | Retrieval Number: A2979059120/2020©BEIESP | DOI: 10.35940/ijrte.A2979.059120
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Abstract: In this present work NBR/PVC conventional composite containing 70phr carbon black (CB) is taken for study. In order to reduce the utilization of CB, new hybrid nanocomposites containing varied content of both CB(40phr -55phr) and graphenenanoplatelets (GNP) (3phr-9phr) were developed by melt-mixing on a two roll mill and their morphology and mechanical properties were tested and compared with conventional composite. FESEM studies evident that the formation of exfoliated structures of GNP and formation of local CB-GNP hybrid filler network which ensures proper and compatible mixing in the composites. It is also found that mechanical properties such as tensile strength, elongation at break, swelling resistance, hardness and compression set increases with increase in GNP content from 3 to 6phr and whereas tensile modulus and tear strength increases with increase in GNP content from 3 to 9phr. Further the developed NBR/PVC hybrid nanocompositescontaining 55phr of CB and 3phr of GNP exhibited an improvement of 6.8%, 27.9% +1 shore A and 4.1% in tensile strength, tensile modulus, hardness, swelling resistance in comparison to the conventional composite containing 70phr CB. The better performance of NBR/PVC hybrid nanocomposites can be mainly attributed to high surface area of functionalized nanographene and its enhanced interactions with the NBR/PVC matrix, enhanced CB-GNP interactions, improved dispersion of graphene in the rubber blend due the presence of COOH group on the surface of graphene layers and formation of more cross-links between rubber and fillers with increase in nanofiller content . These newly developed hybrid nanocomposites can be used in automotive sector especially for oil seal applications where low compression set and high solvent resistance are of prime importance. 
Keywords: Hybrid nanocomposites, NBR/PVC, graphene nanoplatelets, Mechanical properties, swelling resistance.
Scope of the Article: Mechanical properties