Flocculation and Color Removal Performances of Polyacrylamide and Poly N, N-Dimethylacrylamide Grafted Starch: A Comparative Study
Haradhan Kolya,
Tridib Tripathy
Issue:
Volume 3, Issue 1, January 2017
Pages:
1-11
Received:
4 October 2016
Accepted:
24 November 2016
Published:
13 February 2017
Abstract: Starch-g-polyacrylamide (St-g-PAM) and Starch-g- poly (N, N-dimethylacryl amide) (St-g-PDMA) were prepared by using acrylamide (AM) and N, N-dimethylacrylamide (DMA) by Ce (IV) ion induced aqueous polymerization technique. Various grafting parameters were optimized. The so prepared graft copolymers were characterized by fourier transform infrared spectroscopy (FTIR) spectroscopy, molecular weight determination by size exclusion chromatography (SEC), thermal analysis (TGA / DTG), X-ray powder diffraction (XRD) and biodegradation studies. Flocculation performances of the graft copolymers were compared in 1.0 wt% bentonite clay, 1.0 wt % coal suspensions and 10 wt% malachite green (a textile dye) solution and in a textile dye effluent. Between the two polymers St-g-PAM and St-g-PDMA, the later showed better performance in the flocculation of bentonite and coal suspensions but the former showed better performance in the color removal from the malachite green solution and from one of the textile industrial waste water.
Abstract: Starch-g-polyacrylamide (St-g-PAM) and Starch-g- poly (N, N-dimethylacryl amide) (St-g-PDMA) were prepared by using acrylamide (AM) and N, N-dimethylacrylamide (DMA) by Ce (IV) ion induced aqueous polymerization technique. Various grafting parameters were optimized. The so prepared graft copolymers were characterized by fourier transform infrared s...
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Fabrication and Characterization of Unsaturated Copolyesters Based on Diarylidenecyclohexanone
Issue:
Volume 3, Issue 1, January 2017
Pages:
12-20
Received:
3 March 2017
Accepted:
19 March 2017
Published:
18 April 2017
Abstract: New series of unsaturated copolyesters based on diarylidenecyclohexanone, were synthesized by the interfacial polycondensation polymerization technique. Aldol condensation reaction in acid media was used for preparation of three kinds of monomers and investigated by FT IR and 1H NMR. The copolymers have been synthetized by the polymerization of 2, 6-bis (4-hydrxybenzylidene) cyclohexanone I, 2, 6-bis (3-hydroxybezylidene) cyclohexanone II, or 2, 6-bis (4-hydroxy-3-methoxybenzylidene) cyclohexanone III with isophthaloyl, terphthaloyl, adipoyl, sebacoyl and azobenzene 4, 4-dicaroxyldichloride. The resulting copolyesters were characterized by FT-IR, 1HNMR. The intrinsic viscosity of these copolyesters was used for the determination of the molecular weight. The thermal stabilities of the prepared copolyesters were evaluated thermogravimeteric analysis (TGA). Differential thermal analysis (DTA) was used for determination of glass temperatures. X–ray analysis showed that polymers have low degree of crystallinity. The morphological properties of some selected copolyesters were detected by SEM. The dielectric and electrical resistance, capacitance, inductance, demonstrating the insulator behaviour of copolymers.
Abstract: New series of unsaturated copolyesters based on diarylidenecyclohexanone, were synthesized by the interfacial polycondensation polymerization technique. Aldol condensation reaction in acid media was used for preparation of three kinds of monomers and investigated by FT IR and 1H NMR. The copolymers have been synthetized by the polymerization of 2, ...
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