Malaysian Journal of Analytical Sciences Vol 22 No 5 (2018): 775 - 784

PHYSICOCHEMICAL CHARACTERISTICS OF RECYCLED TYRE TREAD COMPOUNDS

(Ciri-Ciri Fizik-kimia Sebatian bagi Bunga Tayar Kitar Semula)

Muhammad Abbas Ahmad Zaini^1,2*, Agus Arsad^2,3, Zainul Akmar Zakaria^2,4, Azhar Abdollah⁵, Zaharrudin Abdul Wahid⁵

¹Centre of Lipids Engineering & Applied Research, Ibnu-Sina Institute for Scientific & Industrial Research

²School of Chemical & Energy Engineering

³UTM-MPRC Institute for Oil & Gas

⁴Institute of Bioproduct Development

Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia

⁵Revocomm Technologies Sdn Bhd,

Bandar Pinggiran Subang, 40150 Shah Alam, Selangor, Malaysia

*Corresponding author: abbas@cheme.utm.my

Received: 14 January 2018; Accepted: 26 July 2018

Abstract

The present work was aimed at evaluating the physicochemical characteristics of seven recycled tyre tread compounds. The materials were characterized for elemental composition, surface morphology, surface chemistry, oil content, ash content, thermal degradation and dielectric properties. Some of the materials were analyzed according to the Rubber Research Institute Malaysia (RRIM) in-house methods for comparison. Natural rubber, butadiene rubber and styrene-butadiene rubber were also employed to validate the thermal degradation profile. Results show that all materials exhibit comparable elemental composition, and dielectric and surface properties, but dissimilar composition of rubber compounds as revealed by the simple mass balance-thermogravimetric approach. The finding is consistent with the RRIM in-house methods. The proposed thermogravimetric approach is sufficient to assess the composition and quality of recycled tyre tread compounds.

Keywords: recycled tyre tread compound, physicochemical characteristic, mass balance-thermogravimetric approach

Abstrak

Kajian ini bertujuan untuk menilai ciri-ciri fizik-kimia tujuh sebatian bagi bunga tayar kitar semula. Bahan-bahan tersebut dicirikan berdasarkan komposisi unsur, morfologi permukaan, kimia permukaan, kandungan minyak, kandungan abu, kemerosotan terma dan sifat dielektrik. Beberapa bahan telah dianalisis mengikut kaedah dalaman Institut Penyelidikan Getah Malaysia (RRIM) untuk perbandingan. Getah semulajadi, getah butadiena dan getah stirena-butadiena juga digunakan untuk mengesahkan profil kemerosotan terma. Keputusan menunjukkan bahawa semua bahan mempamerkan komposisi elemen, dan sifat dielektrik dan permukaan yang hampir serupa, tetapi komposisi sebatian getah yang berbeza seperti didedahkan oleh pendekatan mudah termogravimetrik-imbangan jisim. Penemuan ini sejajar dengan kaedah dalaman RRIM. Pendekatan termogravimetrik yang dicadangkan ini memadai untuk menilai komposisi dan kualiti sebatian bagi bunga tayar kitar semula.

Kata kunci: sebatian bagi bunga tayar kitar semula, ciri fizik-kimia, pendekatan termogravimetrik-imbangan jisim

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