title: Grafting of N-(hydroxymethyl) acrylamide on to κ-carrageenan: synthesis, characterization and applications.
abstract: The synthesis of graft copolymer [κ-carrageenan-g-N-(hydroxymethyl) acrylamide] is carried out in nitrogen atmosphere using potassium peroxymonosulphate (PMS) and glycolic acid (GA) as redox system. The effect of reaction variables including the concentration of N-(hydroxymethyl) acrylamide (4 × 10(-2) to 36 × 10(-2))mol dm(-3), PMS (4 × 10(-3) to 20 × 10(-3))mol dm(-3), GA (1.6 × 10(-3) to 4.8 × 10(-3)) mol dm(-3), sulphuric acid (4 × 10(-3) to 12 × 10(-3)) mol dm(-3), κ-carrageenan (0.6-1.8) g dm(-3) as well as time duration (60-180)min and temperature (25-45)°C has been studied. The physicochemical properties of graft copolymer synthesized have been performed in terms of water swelling, metal ion sorption and flocculation with respect to the κ-carrageenan as a parent polymer. The graft copolymer has been characterized by FTIR and thermogravimetic analysis.
authors: Polymer Science Research Laboratory, Department of Chemistry, University of Allahabad, Allahabad, India.
authors: Shiv Kumar
authors: SK
authors: Verma
authors: Polymer Science Research Laboratory, Department of Chemistry, University of Allahabad, Allahabad, India.
authors: Vijay Shankar
authors: VS
authors: Pandey
authors: Polymer Science Research Laboratory, Department of Chemistry, University of Allahabad, Allahabad, India.
authors: Mithilesh
authors: M
authors: Yadav
authors: Polymer Science Research Laboratory, Department of Chemistry, University of Allahabad, Allahabad, India. Electronic address: kunjbehari1234@rediffmail.com.
authors: Kunj
authors: K
authors: Behari
keywords: Flocculation; Metal ion uptake; N-(hydroxymethyl) acrylamide; Thermal analysis; Water swelling behaviour; κ-Carrageenan