Abstract
In this work, the photopolymerization of Ricinodendron heudelotii (R. heudelotii) oil and methyl methacrylate in presence and absence of iron(III) tris(oxalato) ferrate(III) tetrahydrate (Fe[Fe(C2O4)3]·4H2O) (A) in N,N′-dimethylformamide under UV radiation of 254 nm at 40 °C has been studied. The rate of polymerization, R P, varies linearly with the inverse of [A] up to 6.5 × 10−4 mol L−1 and decreases above this concentration with the increase of [A]. The photoinitiator-free polymerization and polymerization in presence of the Fe(III) photoinitiator exhibit similar polymerization behavior. Thermal analysis of poly(R. heudelotii oil-co-MMA) was investigated by thermogravimetric analysis method. The thermal analysis was performed at five different heating rates. The poly(R. heudelotii oil-co-MMA) synthesized in the presence of the photoinitiator exhibits three stages of decomposition while two stages of decomposition pattern are prominent in photoinitiator-free polymers and for both polymers the main decomposition occurs at temperature range 300–500 °C. The apparent activation energy (E a) of the decomposition has been calculated by three non-isothermal methods of Flynn–Wall–Ozawa, Kissinger and modified Coats–Redfern.
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Acknowledgments
The authors wish to thank Dr. D. Ramaiah, Director, CSIR-NEIST, Jorhat for permission to publish the results. E.F.A. expresses his heartfelt thanks to CSIR-India and TWAS-Italy for award of the CSIR-TWAS fellowship (FR Number: 3240239552) for postgraduate studies at CSIR-NEIST, Jorhat.
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Assanvo, E.F., Baruah, U., Konwar, D. et al. Photopolymerization of Ricinodendron heudelotii oil and methyl methacrylate in presence and absence of iron(ΙII) oxalato complex as photoinitiator. Polym. Bull. 72, 3209–3225 (2015). https://doi.org/10.1007/s00289-015-1462-9
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DOI: https://doi.org/10.1007/s00289-015-1462-9