Abstract
Poly(methyl methacrylate)/α-Fe 2O 3 composites were prepared by in situ bulk radical polymerization of methyl methacrylate in the presence of the cubic α-Fe 2O 3 particles using 2,2′-azobisisobutyronitrile as initiator. The cubic α-Fe 2O 3 particles were synthesized by forced hydrolysis of FeCl 3 and characterized by X-ray diffraction analysis and transmission electron microscopy. The molar masses and molar mass distribution of synthesized PMMA samples were determined by gel permeation chromatography. The influence of α-Fe 2O 3 filler particles on the thermal properties of the PMMA matrix was investigated using thermogravimetry and differential scanning calorimetry. The molar mass and polydispersity of PMMA extracted from composite samples were not influenced by cubic α-Fe 2O 3 particles. The obtained composites have better thermal and thermooxidative stability than pure PMMA. On the other hand, the values of the glass transition temperature of composite samples were identical to the glass transition temperature of pure PMMA.
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