摘要
Abstract
Poly(3-hydroxybutyrate-3-hydroxyhexanoate)/poly(lactic acid) (PHBH/PLA=80/20) blends were prepared via a melt blending method by using poly(ethylene oxide) (PEO),styreneglycidyl methacrylate copolymer (REC),ethylene-co-glycidyl methacrylate (E-GMA),ethylenemethyl acrylate-glycidyl methacrylate terpolymer (E-MA-GMA) and maleic-anhydride-grafted poly (lactic acid) (PLA-g-MAH) as compatiblizers.Mechanical properties,morphology and thermal properties of the blends were characterized by differential scanning calorimetry,dynamic thermomechanical analyzer,scanning electron microscopy and universal testing machine.The compatibility of PHBH/PLA was evaluated,and the effect of the compatibilizers on their compatibility was investigated.The results indicated that the effect of the compatibility was better with addition of REC or PLA-g-MAH,and the presence of REC or PLA-g-MAH reduced the difference between the glass-transition temperatures of PHBH and PLA and also reduced the particle size of dispersed phase with a more uniform distribution in the blends.Moreover,at a content of 4 wt ％ of REC or PLA-g-MAH,the impact strength increased by 43.8 ％ and 53.6 ％,and the elongation at break increased by 100 ％ and 120 ％,respectively.关键词
聚(3-羟基丁酸酯-3-羟基己酸酯)/聚乳酸/共混/相容性/马来酸酐接枝聚乳酸Key words
poly(3-hydroxybutyrate-co-3-hydroxyhexanoate)/poly(lactic acid)/blend/compatibility/poly(lactic acid)-g-maleic anhydride copolymer分类
化学化工
