Pusat Pengajian Kejuruteraan Bahan dan Sumber Mineral - Monograf

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Effect of bentonite loading on polypropylene functionalized maleic anhydride
(2009-05-01)
Ali, Hayazi
The effect of bentonite on degree of grafting of polypropylene functionalized maleic anhydride (PP-g-MAh) has been studied. Preparation of PP-g-MAh was carried out using melt radical grafting in Polydrive Thermo Haake internal mixer at 180˚C with rotor speed 50 rpm for five minutes. The bentonite concentration was varied up to 25 phr loading with the monomer and initiator concentrations were fixed at 5 phr and 1 phr respectively. The quantification of success maleic anhydride grafted onto polypropylene was done by back titration method and the percentage of grafted maleic anhydride was supported by the Fourier Transform Infra Red spectra. Besides Rheological study also conducted in order to observe melt flow behavior. It was found that degree of grafting of maleic anhydride increase until the maximum 1.3% achieved at 10 phr bentonite loading. Rheological study showed that melt viscosity reduced at low bentonite loading and then increased when benotnite concentration exceeded more than 5 phr.