title: Synthesis of partially hydrolyzed graft copolymer (H-Ipomoea hederacea seed gum-g-polyacrylonitrile).
abstract: Polyacrylonitrile was grafted to Ipomoea hederacea (Ih) seed gum with 138.5% grafting yield and 43.55% grafting efficiency in a procedure that was performed under homogeneous microwave (MW) irradiation conditions for 70s in the absence of a radical initiator. Under similar conditions, a maximum grafting yield of 108% and 33.96% efficiency was achieved when the K2S2O8/ascorbic acid redox system was used as a radical initiator in a thermostatic water bath at 35 °C. The effects of reaction variables, such as monomer/Ih seed gum concentration, MW power, and exposure time on the graft copolymerization were studied. The partially hydrolyzed graft copolymer (H-Ih-g-PAN) formed a loose, porous surface and improved the water absorbency of Ih seed gum. The swelling behavior of H-Ih-g-PAN in various ionic salt (NaCl, MgCl2 and Na2SO4) solutions was also systematically investigated. The graft copolymer was further characterized using FTIR, TGA, XRD, and SEM.
authors.affiliation: Department of Mechanical Engineering, Kyung Hee University, South Korea.
authors.forename: Mithilesh
authors.initials: M
authors.lastname: Yadav
authors.forename: Somit Kumar
authors.initials: SK
authors.lastname: Singh
authors.forename: Kyong Yop
authors.initials: KY
authors.lastname: Rhee
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry*; D005881:Gingiva / Q000737:chemistry*; D006868:Hydrolysis; D027741:Ipomoea; D009682:Magnetic Resonance Spectroscopy; D008872:Microwaves; D012492:Salts / Q000737:chemistry; D012639:Seeds; D017550:Spectroscopy, Fourier Transform Infrared; D013818:Thermogravimetry; D014961:X-Ray Diffraction
chemical_list: D000180:Acrylic Resins; D012492:Salts; C010504:polyacrylonitrile