PHA/MWCNTs复合材料的制备及力学性能分析

Study on Preparation and Mechanical Properties of PHA/MWCNTs Composites

将两种多壁碳纳米管（MWCNTs）,非极性MWCNTs和甲基丙烯酸缩水甘油酯接枝多壁碳纳米管（MWCNTs-g-GMA）,分别与聚羟基脂肪酸酯（PHA）共混制备PHA/MWCNTs复合材料,同时探究了MWCNTs对聚羟基脂肪酸酯（PHA）的改性效果。结果表明：随着MWCNTs含量的增加,两种PHA/MWCNTs复合材料的断裂功均先增大后减小,同时,PHA/非极性MWCNTs复合材料的屈服强度近似线性增长,而PHA/MWCNTs-g-GMA复合材料则近似指数增长。随着MWCNTs含量的增加,两种复合材料的结晶度也有所改善,其中MWCNTs-g-GMA的添加对PHA结晶的影响较大,当MWCNTs-g-GMA含量为0.1%时,复合材料的结晶度较纯样增大了9.16%。此外,两种MWCNTs均与PHA具有良好的相容性。

The two kinds of PHA/MWCNTs composites were prepared by blending non-polar MWCNTs and MWCNTs-g-GMA with PHA respectively, and the effects of MWCNTs on modification of PHA were studied. The results show that： with the increase of MWCNTs content, the fracture work of the two kinds of PHA/MWCNTs composites increases first and then decreases, and the yield strength of PHA/non-polar MWCNTs composites increases nearly linearly, while the PHA/MWCNTs-g-GMA composites increases exponentially. The crystallinity of the two kinds of PHA/MWCNTs composites improves with the increase of MWCNTs content, and the addition of MWCNTs-g-GMA has significant influence on the crystallization of PHA. When the MWCNTsg-GMA content is 0.1%, the crystallinity of the composites increased by 9.16% than that of the pure samples. Moreover, the two kinds of MWCNTs have good compatibility with PHA.