Thermal behaviour of copolymers of methyl methacrylate and 2-ethylhexyl methacrylate |
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| Authors: | I K Varma M Patnaik V Choudhary |
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| Institution: | 1. Centre for Materials Science and Technology, Indian Institute of Technology, 110016, Delhi, Hauz Khas, New Delhi, India
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| Abstract: | Five copolymer samples containing different mole fractions of methyl methacrylate (MMA) and 2-ethylhexyl methacrylate (EHMA) were prepared by bulk polymerisation at 70°C using 0.2% benzoyl peroxide as an initiator. The copolymer composition was determined by1H NMR spectroscopy. Molecular weight of copolymers was determined by gel permeation chromatography and viscosity measurements. Thermogravimetric experiments were conducted to evaluate activation energy for the degradation of copolymers. Two to four reaction stages for the weight loss were observed in the copolymers. A decrease in thermal stability was observed by an increase in EHMA content. |
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