【摘要】 通过溶液聚合法,合成了聚乳酸(PLA)与丙烯酸(AA)的接枝共聚物PLA-g-AA,用以改善PLA与淀粉熔融共混物的相容性。研究了不同的接枝工艺条件对共聚物接枝率的影响,并考察了接枝聚乳酸与淀粉共混物的力学性能和结晶性。结果表明,最佳工艺条件是淀粉含量70%、接枝物含量15%、反应温度170℃、反应时间10min。在此条件下共混物的拉伸强度可达到27.35MPa,弹性模量728.22MPa,断裂伸长率达到3.59%。更多还原

【Abstract】 The solution polymerization for Acrylic Acid (AA) onto Poly (lactic acid) (PLA) was studied, and the effect of different factors on the grafting degree was investigated. The properties of a PLA and starch composite (PLA/Starch) and a AA grafted PLA and Starch composite (PLA-g-AA/Starch) were also compared. The results showed that the proper technological condition is Starch-plastic with 70% starch content and 15% graft polymer content and 170 ℃ reaction temperature and 10 min reaction time. The Tensile strength can reach 27.35 Mpa,a Young’s modulus is 728.22 MPa, and entensibility of fracture can reach 3.59%.更多还原