Compatibilization and properties of modified starch-poly(lactic acid) blend

Hwan Lee Sang, Kim Dukjoon, Ji Heung Kim, Hyun Lee Dong, Jun Sim Sang, Do Nam Jae, Kye Hyoungsan, Youngkwan Lee

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


Starch was grafted with maleic anhydride by melt process and then the grafted starch was blended with poly(lactic acid). The thermal properties of the poly(lactic acid), poly(lactic acid)/starch, and poly(lactic acid)/ modified starch were observed by DSC and TGA analysis. In the case of poly(lactic acid)/modified starch, an additional melting peak at 165°C accompanying with 172°C assigned to pure poly(lactic acid) melting transition was clearly displayed in DSC analysis. Also, smooth decomposition pattern between starch and poly(lactic acid) was also monitored in poly(lactic acid)/modified starch blend by TGA analysis. The modulus of poly(lactic acid)/modified starch was 12% higher than that of poly(lactic acid)/starch. The thermal and mechanical characteristics of poly(lactic acid)/modified starch might be due to the enhanced compatibilization between each components, which was also observed in SEM analysis.

Original languageEnglish
Pages (from-to)519-523
Number of pages5
JournalPolymer (Korea)
Issue number6
Publication statusPublished - 2004 Nov
Externally publishedYes


  • Biodegradable polymer
  • Maleic anhydride
  • Modified starch
  • Poly(lactic acid)

ASJC Scopus subject areas

  • General Chemical Engineering
  • Polymers and Plastics
  • Materials Chemistry


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