PLA 埃洛石纳米管复合材料制备与性能.pdf

PLA_埃洛石纳米管复合材料制备与性能第 48 卷，第 12 期 ，
tes were prepared by melt blending. The effects of m-HNTs content on the microstructure，
crystallization behavior，rheological and mechanical properties of PLA／m-HNTs nanocomposites were investigated. The results
show that m-HNTs can be dispersed in the PLA matrix uniformly when the mass fraction of m-HNTs is not more than 2%. Crystal-
lization ability of PLA is improved effectively by the addition of m-HNTs，and the melting point and crystallinity of PLA／m-HNTs
nanocomposites are increased while the crystal form s still i αcrystal without change. The viscosity of PLA／m-HNTs composites
show a shear thinning behavior，and the shear viscosity increases firstly and then decreases with the increase of m-HNTs content.
The tensile strength and elongation at break of PLA／m-HNTs composites show a tendency to increase firstly and then decrease with
the increase of m-HNTs content. The impact strength shows the same trend s the a tensile properties. When the content of m-HNTs is
2wt%，the impact strength of PLA／m-HNTs composites reaches the maximum value of kJ／m2.
Keywords ：polylactic acid ；halloysite nanotubes ；silane coupling agent ；microstructure ；property
发展生物可降解聚合物材料取代石油基聚合 动生物可降解聚合物材料