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Studies on the curing behaviour and mechanical properties of styrene/methyl methacrylate grafted deproteinized natural rubber latex |
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| Authors: | Siti Hajjar Che Man Azanam S. Hashim Hazizan Md. Akil |
| Affiliation: | (1) School of Material and Mineral Resources Engineering, Universiti Sains Malaysia, Engineering Campus, Nibong Tebal, 14300, Pulau Pinang, Malaysia;(2) Department of Polymer Engineering, Universiti Teknologi Malaysia, 81310 Johor Bahru, Johor, Malaysia;(3) Malaysia Institutes of Chemical and Biotechnology, Universiti Kuala Lumpur, 78000 Alor Gajah, Melaka, Malaysia |
| Abstract: | The graft copolymerization of styrene/methyl methacrylate (MMA) onto deproteinized natural rubber (DPNR) latex was carried out using ammonium peroxy disulfate (N2H8O8S2) as the initiator. The presence of the grafted polystyrene (PS) and polymethyl methacrylate (PMMA) on the rubber backbone was confirmed by FTIR spectroscopy. The effects of monomer concentrations on curing characteristics and mechanical properties were studied. It was found that the cure time and scorch time were increased with increasing monomer concentration whereas the torquemax–min value was slightly decreased. It was also noted that the increase in the monomer concentration resulted in stiffer rubber with increased modulus and reduced elongation at break. |
| Keywords: | Copolymerization DPNR latex Grafting Methyl methacrylate Polymerization Styrene |
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