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Polymers 2015, 7(7), 1205-1220; doi:10.3390/polym7071205

Improved Method for Preparation of Amidoxime Modified Poly(acrylonitrile-co-acrylic acid): Characterizations and Adsorption Case Study

1
Department of Chemical and Environmental Engineering, Faculty of Engineering, University Putra Malaysia, UPM Serdang 43400, Malaysia
2
Department of Chemistry, Faculty of Science, University Putra Malaysia, UPM Serdang 43400, Malaysia
3
Institute of Tropical Forestry and Forest Products (INTROP), University Putra Malaysia, UPM Serdang 43400, Malaysia
4
Department of Environment, Islamic Azad University, Isfahan 81595-158, Iran
5
Department of Chemical Engineering, Faculty of Engineering and Science, University Tunku Abdul Rahman, Cheras, Kajang 43000, Malaysia
*
Author to whom correspondence should be addressed.
Academic Editor: Sébastien Perrier
Received: 10 May 2015 / Revised: 12 June 2015 / Accepted: 17 June 2015 / Published: 2 July 2015
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Abstract

Redox polymerization of poly(acrylonitrile-co-acrylic acid) (poly(AN-co-AA)) is performed at 40 °C under N2 gas by varying the ratio of acrylonitrile (AN) and acrylic acid (AA) in the feed. The yield production of poly(acrylonitrile) (PAN) is 73% and poly(AN-co-AA) with a feed ratio of 93:7 is the highest yield (72%). The PAN and poly(AN-co-AA) are further chemically modify with hydroxylamine hydrochloride. The FTIR spectroscopy is used to confirm the copolymerization of poly(AN-co-AA) and chemical modification of poly(AN-co-AA). Elemental microanalysis shows that the overall trend percentage of carbon, hydrogen, and nitrogen for all feed ratios are slightly decreasing as the feed ratio of AA is increasing except for poly(AN-co-AA) 93:7. The SEM images shows that spherical diameter of poly(AN-co-AA) is smaller compared to the PAN and amidoxime (AO) modified poly(AN-co-AA). The TGA (thermogravimetric analysis) analysis reveals that the poly(AN-co-AA) degrades at lower temperatures compared to the PAN but higher than AO modified poly(AN-co-AA). The case study adsorption test showed that the AO modified poly(AN-co-AA) 93:7 had the highest percentage removal of Cd2+ and Pb2+. View Full-Text
Keywords: redox polymers; synthesis; copolymerization; modification; infrared spectroscopy; morphology; thermogravimetric analysis (TGA); elemental analysis redox polymers; synthesis; copolymerization; modification; infrared spectroscopy; morphology; thermogravimetric analysis (TGA); elemental analysis
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MDPI and ACS Style

Mohd Zahri, N.A.; Md Jamil, S.N.A.; Abdullah, L.C.; Shean Yaw, T.C.; Nourouzi Mobarekeh, M.; Sim, J.H.; Mohd Rapeia, N.S. Improved Method for Preparation of Amidoxime Modified Poly(acrylonitrile-co-acrylic acid): Characterizations and Adsorption Case Study. Polymers 2015, 7, 1205-1220.

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