High performance elastomer blend based on maleated natural rubber and hydroxyl-terminated polydimethylsiloxane

Document Type : Original Article

Author

Polymers and Pigments Department, National Research Centre, Cairo, 12622, Egypt.

Abstract

In an attempt to improve the mechanical and thermal properties of natural rubber (NR) in order to expand its range of application, this work aims to prepare a high performance elastomer blend (MNR- PDMS) of it with hydroxyl terminated polydimethylsiloxane (PDMS-OH). The elastomer blend (MNR-PDMS) was prepared by first modifying the surface of NR with maleic anhydride and then blending it with PDMS-OH using a laboratory roll mill. A sulfur-based curing system was used to cure the blend. Different loadings of PDMS-OH (2, 3, 4 phr) were used to determine the optimum one. Fourier transform infrared spectroscopy (FTIR) was used to characterize the structure of MNR-PDMS elastomer blends. The cure characteristics, mechanical and thermal properties of the MNR-PDMS elastomer blends were studied in detail. Moreover, the surface morphologies of the prepared MNR-PDMS elastomer blends were studied using scanning electron microscopy (SEM). The results showed a remarkably improvement in the mechanical and thermal properties of the prepared MNR-PDMS elastomer blends compared to the unmodified vulcanized natural rubber, and 2 phr was the optimal loading to obtain elastomer with superior mechanical properties.

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Egyptian Journal of Chemistry
Volume 66, Issue 13 - Serial Number 13
Special Issue: Applied Chemistry for Greener Life and Sustainability
December 2023
Pages 1469-1477

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History

  • Receive Date: 30 April 2023
  • Revise Date: 20 May 2023
  • Accept Date: 04 June 2023

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