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Open AccessArticle

Microwave-Assisted Catalytic Synthesis of Bio-Based Copolymers from Waste Cooking Oil

1
Department of Agricultural, Food and Nutritional Sciences, University of Alberta, Edmonton, AB T6G 2P5, Canada
2
Department of Chemistry, The Islamia University of Bahawalpur, Bahawalpur 63100, Pakistan
*
Author to whom correspondence should be addressed.
Academic Editor: Armando J. D. Silvestre
Materials 2017, 10(3), 315; https://doi.org/10.3390/ma10030315
Received: 9 January 2017 / Revised: 10 March 2017 / Accepted: 14 March 2017 / Published: 20 March 2017
Solvent-free copolymerization of epoxides derived from fatty esters of waste cooking oil with phthalic anhydride using (salen)CrIIICl as catalyst and n-Bu4NCl/DMAP (tetrabutylammonium chloride/4-(dimethylamino)pyridine) as co-catalysts was carried out for the first time under microwave irradiation, where reaction time was reduced from a number of hours to minutes. The polyesters were obtained with molecular weight (Mw = 3100–6750 g/mol) and dispersity values (D = 1.18–1.92) when (salen)CrIIICl/n-Bu4NCl was used as catalysts. Moreover, in the case of DMAP as a co-catalyst, polyesters with improved molecular weight (Mw = 5500–6950 g/mol) and narrow dispersity values (D = 1.07–1.28) were obtained even at reduced concentrations of (salen)CrIIICl and DMAP. The obtained products were characterized and evaluated by attenuated total reflection-Fourier transform infrared spectroscopy (ATR-FTIR), proton nuclear magnetic resonance (1H-NMR) spectroscopy, gel permeation chromatography (GPC), thermogravimetric analysis (TGA) and differential scanning calorimetric (DSC) Techniques. View Full-Text
Keywords: waste cooking oil; phthalic anhydride; copolymerization; microwaves waste cooking oil; phthalic anhydride; copolymerization; microwaves
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Shahi, M.N.; Arshad, M.; Ullah, A. Microwave-Assisted Catalytic Synthesis of Bio-Based Copolymers from Waste Cooking Oil. Materials 2017, 10, 315.

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