writer：Saihua Feng, Defeng Wu, Haiyun Liu, Chong Chen, Junliang Liu, Zhen Yao
keywords：poly(butylene adipate-co-terephthalate) (PBAT); graphene nanoplatelets; composites; crystallization; creep.
source：期刊
specific source：Thermochimica Acta
Issue time：2014年

Thermochimica Acta 2014, 587, 72-80 

ABSTRACT:

Biodegradable poly(butylene adipate-co-terephthalate) (PBAT)  composites containing graphite nanoplatelets were prepared by melt  compounding. The results reveal that the nanoplatelets have full distribution throughout the PBAT matrix, although they are still dispersed  as the multilayered stack. Those well distributed graphite nanoplatelets act as the heterogeneous nucleating agent to facilitate formation of crystal nucleus and also as the physical hindrance to retard crystal growth. But the nucleation dominates overall crystallization kinetics at experimental graphite nanoplatelets loading levels because the composites show higher crystallization rates and lower activation energies than those of the neat PBAT. The results from creep study further confirm the role of physical hindrance played by graphite nanoplatelets because the creep strain of system is highly restrained by the presence of nanoplatelets. However, this inhibiting effect is attributed to suppressed relaxation of chain coins, rather than confinement to chain segments.  

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http://www.sciencedirect.com/science/article/pii/S0040603114001749