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    Developing Crumbed Rubber Tires/Epoxy Composite, by Surface Treatment with Different Silane Coupling Agents
    (Trans Tech Publications Ltd, 2022) Abdulhameed, J.I.; Ali, A.H.; Kara, I.H.
    Converting used tries to useful materials and avoiding harmful effects of accumulation used tires, is a great economic and environmental issue. Using of crumbing rubber of used tires CRT as filler materials shows declining in mechanical properties of CRT/polymer composites as weak bonding between CRT and polymeric matrices. This work include, CRT surface treating by three kinds of silane coupling agent, Trimethoxysilyl propyl methacrylate, 3-chloropropyl triethoxy silane and Silicic acid, before using as filler materials in epoxy matrix. 10 wt. % of non-treated and treated CRT/epoxy composite specimens have been prepared and tested to evaluate effect of CRT surface treatment into composite mechanical properties. The results show that modulus of elasticity, tensile strength, and fracture toughness of treated CRT/epoxy composite could improve by 56%, 30%, 36% respectively comparing with that of non-treated CRT/epoxy, after treating by 3-chloropropyl triethoxy silane coupling agent, whereas surface treating by other types of silane coupling agents could produce less mechnical improvement but still better that of non-treated. © 2022 Trans Tech Publications Ltd, Switzerland.
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    Preparing Eco-friendly Composite from End-life Tires and Epoxy Resin and Examining Its Mechanical, and Acoustic Insulation Properties
    (Universiti Malaysia Perlis, 2024) Abdulhameed, J.I.; Ali, A.H.; Kara, I.H.; Mahan, H.M.; Konovalov, S.V.; Al-Nedawi, N.M.
    The recycling of the enormous number of used tires that are discarded annually after the end of their service is a high-priority issue in order to conserve the environment and reduce the raw material costs of products, particularly in cases where high strength requirements are not necessary. In this study, crumbed tire rubber (CTR) was used as a filler with different weight fractions (10%, 20%, 30%, and 40%) to prepare CTR/epoxy composites. Mechanical, thermal, and acoustic insulation properties were tested to gather sufficient data on the development of these properties with increasing CTR content. The results indicate a decline in mechanical properties with increasing CTR content. The composite with 40 wt. % CTR showed a decrease in hardness, tensile strength, and flexural strength compared to neat epoxy by 75%, 70%, and 75% respectively. Additionally, the thermal conductivity of this composite was 36.3% higher than that of epoxy. Finally, the acoustic insulation test for the composite with a 40% CTR weight fraction showed improved sound insulation over a wide range of applied frequencies (0-10000) Hz. © 2024, Universiti Malaysia Perlis. All rights reserved.