China Plastics ›› 2018, Vol. 32 ›› Issue (10): 50-57.DOI: 10.19491/j.issn.1001-9278.2018.10.008

Previous Articles     Next Articles

Study on Toughening of Poly(lactic acid) with Vegetable Oil Polyol and L-lysine Diisocyanate Through In-situ Reactive Blending

  

  • Received:2018-04-12 Revised:2018-09-06 Online:2018-10-26 Published:2018-10-26
  • Supported by:


Abstract: A novel type of fully biodegradable PLA compounds were prepared by using biobased and biodegradable soybean polyol (HM10100) and L-lysine diisocyanate (LDI) as reactivetoughening monomers via reactive blending.The effects of contents of two reactive monomers and the molar ratio of isocyanate groups (—NCO) and hydroxyl groups (—OH) on the mechanical properties and morphologies of the compounds were investigated.The results indicated that the PLA compounds achieved a maximum value in notched impact strength at the NCO/OH equivalent ratio of 1:0.8 (mol/mol) and the PLA/HM10100 & LDI weight ratio of 60/40.The notched impact strength was improved by a factor of 2.5 compared to that of pure PLA.Thermal analysis results indicated that the cold crystallization temperature and glass transition temperature of the compounds increased with an increase in the content of toughening monomers and the molar ratio of functional groups.