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Optimized conditions for grafting reaction of poly (methyl methacrylate) onto talc filler

Abu Bakar, A. and Subre, A. (2008) Optimized conditions for grafting reaction of poly (methyl methacrylate) onto talc filler. Journal of Chemical and Natural Resources Engineering, 2 . pp. 72-79. ISSN 1823-5255

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Official URL: http://www.fkkksa.utm.my/jcnre/

Abstract

In this study, poly(methyl methacrylate) (PMMA) grafted onto talc was produced using free radical polymerization. Hydrogen peroxide (H202) and ferrous ions (Fe2+) were used as a redox initiator/co-catalyst system. Grafting copolymerization was carried out under nitrogen atmospheric since it is known that oxygen presence will terminate the free radical mechanism. The PMMA homopolymer formed during the reaction was removed from the graft copolymer by Soxhlet extraction using acetone. The grafting percentage and grafting efficiency were systematically investigated. The parameter variables; reaction time, reaction temperature and concentration of ammonium ferrous sulfate directly influenced the graftina percentage. The percent grafting increased to a certain value in each variable. The optimmll conditions for reaction period, reaction temperature and initiator concentrations were 60 minutes, 52°C and 4.87 x 10-3 mol, respectively. Fourier-transform infrared spectroscopy was used to observe the difference between ungrafted with grafted talc. The formation of ester group peak in talc-g-PMMA spectrum has proven that the presence of PMMA onto the talc surface.

Item Type:Article
Additional Information:Productivity Improvement Through Optimization
Uncontrolled Keywords:graft copolymers, free radical, copolymerization
Subjects:T Technology > TP Chemical technology
Divisions:Chemical and Natural Resources Engineering (Formerly known)
ID Code:8699
Deposited By: Norshiela Buyamin
Deposited On:08 May 2009 01:57
Last Modified:10 Aug 2012 00:53

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