The optimized synthesis of starch-g-lactic acid copolymer with high grafting degree catalyzed by sulfuric acid

Zhiying Hu

doi:10.1007/s11595-014-1065-6

Journal of Wuhan University of Technology Materials Science Edition ›› 2014, Vol. 29 ›› Issue (6) : 1187 -1190. DOI: 10.1007/s11595-014-1065-6

Advanced Materials

The optimized synthesis of starch-g-lactic acid copolymer with high grafting degree catalyzed by sulfuric acid

Zhiying Hu ¹^,^{^a}

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Abstract

The starch-g-lactic acid copolymer was synthesized with catalysis of sulfuric acid by onestep process, and the structure of starch-g-lactic acid copolymer was characterized by means of IR, ¹³C-NMR, HMBC, XRD, and SEM. The experimental results show that the maximum grafting degree of starch can reach 75% when the starch-g-lactic acid copolymer is activated at 80 °C for 2 h and reacted with lactic acid at 90 °C for 4 h in vacuum.

Keywords

corn starch / lactic acid / sulfuric acid / starch-g-lactic acid copolymer / graft copolymerization

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Zhiying Hu. The optimized synthesis of starch-g-lactic acid copolymer with high grafting degree catalyzed by sulfuric acid. Journal of Wuhan University of Technology Materials Science Edition, 2014, 29(6): 1187-1190 DOI:10.1007/s11595-014-1065-6

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