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Title Tire-derived reclaimed rubber as a secondary raw material for rubber foams: in the framework of circular economy strategy
ID_Doc 6070
Authors Kouhi, F; Vahidifar, A; Naderi, G; Esmizadeh, E
Title Tire-derived reclaimed rubber as a secondary raw material for rubber foams: in the framework of circular economy strategy
Year 2023
Published Journal Of Polymer Research, 30, 3
Abstract Improper disposal and accumulation of waste tire rubbers have posed a serious threat to the development of a circular economy, a sustainable environment, and human health. In light of the drawback of the current waste management of waste tires, the recycling and transformation of reclaimed rubber (RR) into valuable end products has received significant attention from industries and the academic field. Herein, we propose a facile method to reuse RR in developing closed-cell elastomeric foams based on ethylene propylene diene rubber (EPDM). Rheometry results revealed that the introduction of RR up to 20 phr, increased the cure rate from 11.7 to 13.48%/min, reduced curing time from 12.21 to 9.3 min and also increased ultimate torque from 6.51 to 7.24 N.m. Morphological studies indicated that the RR increased the cell density from 12 to 78 cell/mm(3) and reduced the number average cell size from 940 to 110 mu m. The mechanical results indicated that the introduction of RR could be a feasible alternative for the fabrication of high-performance EPDM foams with improved hardness and resilience. By increasing RR content of EPDM/RR foams, the relative density and cell density of EPDM/RR foams increased, while cell size decreased. The introduction of 10 phr of RR, increased the hardness and resilience of the EPDM foam by 37 shore A and 68%, respectively. The research verified that the attempt to use RR to produce a good foam structure was found to be successful. The results open a way for EPDM/RR foam composites to be applied for sealing and gasket industries as an eco-friendly replacement for virgin products.
PDF https://link.springer.com/content/pdf/10.1007/s10965-023-03467-2.pdf

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