The use of waste rubber in natural rubber in the presence of maleic anhydride-grafted natural rubber (MA-g-NR): study on curing, rheology, morphology, and properties of the blend

Mahsa Nematollahi; Azam Jalali-Arani

doi:10.1515/polyeng-2013-0020

Article

The use of waste rubber in natural rubber in the presence of maleic anhydride-grafted natural rubber (MA-g-NR): study on curing, rheology, morphology, and properties of the blend

Mahsa Nematollahi and Azam Jalali-Arani

Published/Copyright: December 12, 2013

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From the journal Journal of Polymer Engineering Volume 34 Issue 1

Abstract

The direct incorporation of ground tire rubber (GTR) as a waste rubber into a virgin polymer matrix causes a remarkable reduction in its mechanical and performance properties. In this work, maleic anhydride-grafted natural rubber (MA-g-NR) was employed as a compatibilizer to improve the interaction between a natural rubber (NR) matrix and GTR. The effect of MA-g-NR on curing characteristics, rheological behavior, morphology, and performance properties of the NR-GTR blend was studied using an oscillating disk rheometer, rheomechanical spectroscopy (RMS), scanning electron microcopy (SEM), and tensile and abrasion testing. The obtained results by RMS and SEM tests revealed better adhesion between NR and GTR in the presence of MA-g-NR. Using up to 8 parts of MA-g-NR caused an increase in the curing rate index, and a remarkable increase in mechanical properties and abrasion resistance was observed, which was comparable to or even better than the virgin vulcanizate.

Keywords: ground tire rubber; maleic anhydride; natural rubber; waste rubber

Corresponding author: Azam Jalali-Arani, Department of Polymer Engineering and Color Technology, Amirkabir University of Technology, No. 424, Hafez St., Tehran 15875-4413, Iran, e-mail: ajalali@aut.ac.ir

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Received: 2013-1-25

Accepted: 2013-11-4

Published Online: 2013-12-12

Published in Print: 2014-02-01

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Articles in the same Issue

https://doi.org/10.1515/polyeng-2013-0020

Keywords for this article

ground tire rubber; maleic anhydride; natural rubber; waste rubber