Reaction kinetics of cassava starch graft anionic/nonionic-type polymer internal curing agents

Rongjin Liu, Zhihui Sun, Weiheng Xiang, Ping Chen, Ruizhe Zhou



Internal curing can help to improve the durability of concrete by preventing and minimizing initial cracks due to autogenous shrinkage and plastic shrinkage. Using a reliable internal curing agent is essential to the effectiveness of the internal curing process. This paper investigates the reaction kinetics of a starch graft anionic/nonionic-type polymer. The results demonstrate that initiator monomer concentration, and starch concentration are positively correlated with graft reaction rate Rp. Based on the research, the kinetics equation of this cassava starch graft anionic/nonionic-type polymer has also been developed, which coincides well with the law of free radical polymerization. The obtained Rp equation is a first-order dependence of the monomer concentration and the square root of the initiator concentration. And Rp is further correlated to the reaction temperature based on a sigmoid function instead of a linear function. It is also found that the polymerization reaction is characterized by the coexisted disproportion termination and coupling termination.

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Assmann, A., & Reinhardt, H. W. (2014). Tensile creep and shrinkage of SAP modified concrete. Cement and Concrete Research, 58, 179-185.

Bentz, D. P., & Snyder, K. A. (1999). Protected paste volume in concrete: Extension to internal curing using saturated lightweight fine aggregate. Cement and concrete research, 29(11), 1863-1867.

Gugliemelli, L. A., Doane, W. M., Russell, C. R., Swanson, C. L., Arcand, C. G., & Vullo, W. J. (1972). 2264201. Starch-cerium (IV) complexes in aqueous media: formation, isolation, and stability. Journal of polymer science: Part B: Polymer letters, 10(6), 415-421.

Igarashi, S. I., & Watanabe, A. (2006). Experimental study on prevention of autogenous deformation by internal curing using super-absorbent polymer particles. In International RILEM conference on volume changes of hardening concrete: testing and mitigation (pp. 77-86). RILEM Publications SARL.

Jensen, O. M., & Hansen, P. F. (2001). Water-entrained cement-based materials: I. Principles and theoretical background. Cement and concrete research, 31(4), 647-654.

Jensen, O. M., & Hansen, P. F. (2002). Water-entrained cement-based materials: II. Experimental observations. Cement and Concrete Research, 32(6), 973-978.

Lipsa, R., Tudorachi, N., Vasile, C., Chiriac, A., & Grigoras, A. (2013). Novel environmentally friendly copolymers carboxymethyl starch grafted poly (lactic acid). Journal of Polymers and the Environment, 21(2), 461-471.

Liu R. J. (2003). Preparation and Properties of Organic-inorganic Multiple Concrete Internal Curing Materials. Ph.D. Thesis. Wuhan University of Technology, Wuhan.

Lura, P., Wyrzykowski, M., Tang, C., & Lehmann, E. (2014). Internal curing with lightweight aggregate produced from biomass-derived waste. Cement and concrete research, 59, 24-33.

Lutfor, M. R., Rahman, M. Z. A., Sidik, S., Mansor, A., Haron, J., & Yunus, W. W. (2001). Kinetics of graft copolymerization of acrylonitrile onto sago starch using free radicals initiated by ceric ammonium nitrate. Designed Monomers and Polymers, 4(3), 252-259.

Mindess, S., Young, J. F., & Darwin, D. (2003). Concrete, 2nd Ed. Upper Saddle River: New York, pp.T22

Moad G., Solomon D. H. (2006). The Chemistry of Radical Polymerization, 2nd ed. Elsevier, Amsterdam.

Philleo, R. (1991). Materials science of concrete II. American Ceramic Society, Westerville, OH, USA, 1-8.

Rahman, L., Silong, S., Zin, W. M., Rahman, M. Z. A., Ahmad, M., & Haron, J. (2000). Graft copolymerization of methyl acrylate onto sago starch using ceric ammonium nitrate as an initiator. Journal of applied polymer science, 76(4), 516-523.

Ren, H., Niu, Z., Wang, J., & Ning, J. (2012). Comparison of Traditional Methods and Microwave Irradiation Method About Amylum/Acrylic Acid/Acrylamide Polymerization. Edited by Ailton De Souza Gomes, 87.

Schröfl, C., Mechtcherine, V., & Gorges, M. (2012). Relation between the molecular structure and the efficiency of superabsorbent polymers (SAP) as concrete admixture to mitigate autogenous shrinkage. Cement and concrete research, 42(6), 865-873.

Tong Q. Y., Zhang G. W., (2005). Graft polymerization of acrylonitrile and amps onto starch initiated by [Mn(H2P2O7)3]3- . Polym. Mater. Sci. Eng. 21(1), 106-109

Wang, B. J. (2003) Study on the Synthesis and Kinetics of Starch-based Graft Copolymer. Ph.D. Thesis, Nanjing University of Technology, Nanjing.

Weber, S., & Reinhardt, H. W. (1997). A new generation of high performance concrete: concrete with autogenous curing. Advanced Cement Based Materials, 6(2), 59-68.

Yang, B., Zhao, Y. L., Yang, W. M., & Wang, J. Y. (2006). Kinetics Equation of Radiative Graft Copolymerization of Starch and Acrylamide. Yunnan Chemical Technology, 33(3), 8-10.

Yu, F. Q., Yao, S., & Liu, Y. (1999). Kinetics of graft copolymerization of an onto corn starch under UV-light. Polym. Mater. Sci. Eng., 15(5), 62-65.

Zhang Y. P., (2001). Manufacture and application of modified starch. Chemical Industry Press, Beijing.

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Civil Engineering and Architecture Faculty- University Amar Telidji of Laghouat JBMS@2019.