Gamma radiation-induced grafting of acrylamide and dimethyl diallyl ammonium chloride onto starch

• Published in: Carbohydrate polymers Vol. 92; no. 1; pp. 388 - 393
• Main Authors: Lv, Xiaohua, Song, Weiqiang, Ti, Yongzhou, Qu, Lingbo, Zhao, Zhiwei, Zheng, Hongjuan
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 30.01.2013; Elsevier
• Subjects: absorbed dose; Absorption; Acrylamide; Acrylamide - chemical synthesis; Acrylamide - chemistry; acrylamides; Allyl Compounds - chemical synthesis; Allyl Compounds - chemistry; ammonium chloride; Applied sciences; composite polymers; Corn starch; Dimethyl diallyl ammonium chloride; Exact sciences and technology; Fourier transform infrared spectroscopy; Gamma irradiation; Gamma Rays; Graft copolymerization; Grafting and modifications; Magnetic Resonance Spectroscopy; nuclear magnetic resonance spectroscopy; Physicochemistry of polymers; Polymerization - radiation effects; Polymers and radiations; Quaternary Ammonium Compounds - chemical synthesis; Quaternary Ammonium Compounds - chemistry; Spectroscopy, Fourier Transform Infrared; starch; Starch - chemical synthesis; Starch - chemistry; titration; Zea mays - chemistry; Acrylamide; Dimethyl diallyl ammonium chloride; Gamma irradiation; St-g-p(AM-co-DMDAAC); AM; Corn starch; Graft copolymerization; DMDAAC; Radiochemical grafting; Quaternary ammonium copolymer; Starch graft copolymer; Experimental study; Optimization; Operating conditions; Bigraft copolymer; Gamma radiation; Preparation; Acrylamide copolymer; Oside polymer; Allylic derivative copolymer
• ISSN: 0144-8617; 1879-1344
• DOI: 10.1016/j.carbpol.2012.10.002

► Cationic starch was prepared from AM and DMDAAC by Gamma irradiation. ► Cationic starch was characterized by FTIR, weight method and titration method. ► Grafting ratio and cationic degree depend on absorbed dose and composition. ► The changing trends of grafting ratio and cationic degree are very different. Corn starch graft copolymers were prepared from acrylamide/dimethyl diallyl ammonium chloride binary monomers (AM/DMDAAC) by a simultaneous radiation grafting method, and were characterized by FTIR and 1H NMR techniques, weight measurement and titration method. The copolymers with high grafting ratio and high grafting efficiency of binary monomers were achieved at absorbed doses of 2kGy and 3kGy using a 6:9.8:4.2 (w/w/w) ratio of starch/AM/DMDAAC, but their cationic degrees were low. Grafting ratio, grafting efficiency and cationic degree of the copolymers increased with increasing AM content in comonomer mixtures and then decreased at 3kGy using a 6:14 ratio of starch:total comonomers, but their cationic degrees generally decreased with increasing AM content. The grafting ratio, the grafting efficiency and the cationic degree of the copolymers increased, but the grafting efficiency of DMDAAC decreased with varying starch/(AM+DMDAAC) ratio from 6:3 to 6:18 at 3kGy by using a fixed 7:3 ratio of AM:DMDAAC.