Recycling Of Vulcanized Waste Rubber
Through Halogenations And
Amination Chemical Reactions
Author(s)
Y. A. Aggour, A. S. Al-Shihri & M. R. Bazzt
Abstract
Pollution of the environment with scrap vulcanized rubber causes significant
problems, due to the rubber’s resistivity to natural conditions. This work deals
with the chemical modification of waste vulcanized rubber, especially scrap tires,
using chlorination and amination reactions. Chlorination of scrape-powdered
tires was carried out in an aqueous and in a non-aqueous medium, passing
through a continuous stream of Cl2 gas. A high yield of chlorinated waste rubber
is obtained in the case of the aqueous medium using HOCl and HClO4 solutions.
Amination reactions of the highly chlorinated waste rubber sample were
achieved, using different primary, secondary and tertiary amines at 150, 175 and
200 ºC, for two and three hours respectively. Characterizations of recycled waste
rubber are performed using the IR, DSC, and SEM methods. A suggested
mechanism of the reactions has been given.
Keywords: waste rubber, chemical modifications, recycling, thermal
characterization.
1 Introduction
Recently, recycling of waste materials has become of growing importance for all
industries in the world. Rubber products, such as those used in the automotive
and transportation industries, are the biggest consumers of new rubber. Vehicular
tires constitute the most important single items in terms of volume. In
Keywords
waste rubber, chemical modifications, recycling, thermal
characterization.
Related Book
Other papers in this volume
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