Correlating the morphology of poly(L-lactide)/poly(butylene succinate)/graphene oxide blends nanocomposites with their crystallization behavior

eXPRESS Polymer Letters

S. E. Fenni¹ 

关键词: nanocomposites;    graphene oxide;    polylactic acid;    poly(butylene succinate);   

DOI  :  10.3144/expresspolymlett.2018.5

学科分类：生物科学（综合）

来源: eXPRESS Polymer Letters

【 摘 要 】

Bio-based blend nanocomposites of poly(L-lactic acid) (PLLA) and poly(butylene succinate) (PBS), with differentconcentrations (from 0.1 to 0.5 wt%) of graphene oxide (GO), are prepared via solution dispersion of PBS/GO followed bymelt blending with PLLA in a 70/30 PLLA/PBS weight ratio. Scanning and Transmission Electron Microscopy reveals micron-sized droplets of PBS in the PLLA matrix with the GO nanofiller preferentially found in the PBS phase. The GO actsas nucleating agent for both semicrystalline polymers. The nanofiller nucleating effect is compared to the one of own selfnucleifor each polymer, to define a convenient nucleating efficiency (NE) scale. A value of around 80% is determined forGO towards PBS, among the highest NEs ever reported for this polymer. On the other hand, the efficiency in nucleatingPLLA is equal to a modest 15%, also due to the uneven distribution of the nanofiller in the two polymers. A close relationshipbetween the nanocomposite morphology and crystallization behavior of the two different polymers is thus established.

【 授权许可】

CC BY