The toughened bamboo flour/polylactic acid(BF/PLA) composites were manufactured by a melt blending method with acetyl tributyl citrate (ATBC) as plasticizers to improve the ductility of BF/PLA blends. Fourier infrared absorption spectroscopy (FTIR )
thermogravimetric analysis (TGA )
torque rheometer (TR )
scanning electronic microscopy(SEM) and mechanical test were adopted to study the addition of ATBC on the structure and properties of BF/ PLA biocomposites. The results showed that the addition of ATBC lead to an improvement in processing rheological properties and an reduction in glass transition
cold crystallization and melting temperature
but no Influence on the thermal stabilities of BF/PLA composites. The interaction between ATBC and PLA was confirmed by a small shift of C—O stretching peak in IR spectrum. The toughened BF/PLA composites with 15% content of ATBC showed an elongation at break up to 35. 6%
which was increased by 339. 5% compared with the BF/PLA composite without ATBC
and the fracture surface morphology was much rough and proved to be a typical tough fracture by SEM images at this condition.