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Journal of Polymers and the Environment

, Volume 27, Issue 9, pp 1878–1896 | Cite as

Cardanol Functionalized Carboxylated Acrylonitrile Butadiene Rubber for Better Processability, Technical Properties and Biocompatibility

  • Satyajit Samantarai
  • Ahindra Nag
  • Nitesh Singh
  • Debabrata Dash
  • Amit Basak
  • Golok B. NandoEmail author
  • Narayan Ch. DasEmail author
Original paper
  • 64 Downloads

Abstract

The present investigation deals with the latex stage functionalization of carboxylated acrylonitrile butadiene rubber (XNBR) by chemically grafting cardanol onto its backbone main chain to impart multifunctional characteristics to it. The grafting of cardanol onto XNBR in the latex stage has been accomplished successfully using benzoyl peroxide (BPO) as a free radical initiator. Cardanol grafted XNBR (C-g-XNBR) exhibited an increase in molecular weight (7.5%) with an increase in PDI (polydispersity index). The optimum grafting parameters were found to be of 1 phr BPO with 15 phr cardanol at a reaction temperature of 80 °C and a reaction time of 10 h using “Taguchi methodology”. The maximum percentage grafting (PG) and grafting efficiency (GE) were estimated to be 13.8 and 92.8%, respectively at the optimum combination of the reaction parameters. Differential scanning calorimetry and dynamic mechanical analysis results exhibited a decrease in Tg value for the functionalized elastomer. Thermogravimetric analysis displayed an increase in the thermal stability of C-g-XNBR. MTT [3-(4,5-dimethylthiazol-2yl)-2,5-diphenyltetrazolium bromide] assay and hemolysis studies proved that functionalized rubber as biocompatible. Moreover, functionalized XNBR exhibited a potential bactericidal effect against Staphylococcus aureus and Escherichia coli strains. Fire and flame retardancy study revealed an increased LOI (limiting oxygen index) for C-g-XNBR.

Keywords

Functionalization XNBR Mooney viscosity MTT assay Limiting oxygen index 

Notes

Acknowledgements

One of the authors, Mr. S. Samantarai is grateful to the All India Council for Technical Education (AICTE), New Delhi, India, for providing a research fellowship to carry out this study. The authors thank Dr. Subhra Mohanty of Omnova Solutions Pvt. Ltd., Gujarat, India, for providing free latex samples. The authors would like to kindly acknowledge the cooperation received from Dr. Ragini Tilak, Department of Microbiology, IMS, BHU, Varanasi, U. P., India, for carrying out the antibacterial property evaluation study of the rubber samples.

Compliance with ethical standards

Conflict of interest

The authors declare no competing financial interest.

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Rubber Technology CentreIndian Institute of Technology, KharagpurKharagpurIndia
  2. 2.Department of ChemistryIndian Institute of Technology, KharagpurKharagpurIndia
  3. 3.Department of BiochemistryIMS, Banaras Hindu UniversityVaranasiIndia

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