Investigation and Application of In-situ Synthesized Polylactic Acid Grafting Starch Copolymer

doi:10.19491/j.issn.1001-9278.2009.10.004

China Plastics ›› 2009, Vol. 23 ›› Issue (10): 15-20 .DOI: 10.19491/j.issn.1001-9278.2009.10.004

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Investigation and Application of In-situ Synthesized Polylactic Acid Grafting Starch Copolymer

SHAO Jun ZHAO Yao-ming

Received:2009-06-24 Revised:1900-01-01 Online:2009-10-26 Published:2009-10-26

Abstract

Abstract: Polylactic acid was in-situ grafted onto starch via anionic ring opening polymerization. Starch was first dissolved in dimethyl sulfoxide, in which ring opening grafting of lactide was initiated by potassium text-butoxide. The product was characterized using FT-IR, NMR, and XRD. It was found that the optimal copolymerization temperature and time were 75 ℃ and 4 h. When the weight ratios of starch/lactide/potassium text-butoxide were 10/75/3, a graft efficiency of 83 % was obtained. Introducing the prepared graft copolymer into blends of starch/PLA, better dispersion of starch in PLA was observed.

Key words: anionic ring opening polymerization, in-situ polymerize, polylactic acid grafting starch, blend

SHAO Jun ZHAO Yao-ming. Investigation and Application of In-situ Synthesized Polylactic Acid Grafting Starch Copolymer[J]. China Plastics, 2009, 23(10): 15-20 .

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Investigation and Application of In-situ Synthesized Polylactic Acid Grafting Starch Copolymer

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