writer：Wu, Defeng*，Cheng, Yuxin，Feng, Saihua，Yao, Zhen，Zhang, Ming
keywords：none
source：期刊
specific source：Industrial & Engineering Chemistry Research
Issue time：2013年
Polylactide (PLA) composites containing graphene nanosheets were prepared by the approach of solution mixing
for a crystallization study. The results revealed that the graphene nanosheets are well distributed in the PLA matrix, leading to an
evident viscosity increase despite their dispersion as multilayered structures in stack form. Both the cold and melt crystallization
behaviors of PLA were found to depend strongly on the presence of the graphene nanosheets. During cold crystallization, the
graphene nanosheets merely act as an inert filler, and the increased viscosity results in a decrease of the overall crystallization rate
of the composite relative to neat PLA. However, the graphene nanosheets can act as a heterogeneous nucleating agent, which is
their dominant role during melt crystallization. As a result, the composite shows a higher crystallization rate than neat PLA under
these conditions.