Abstract
Poly(butylene succinate) (PBS)/wood flour (WF) composites with different WF content were prepared by twin-screw extrusion at 160 °C. With increasing WF content, the tensile strength of the PBS/WF composite without polymeric diphenylmethane diisocyante (pMDI) decreased, while that of the composite with pMDI increased. The addition of kraft lignin (KL) deteriorated the tensile properties of the composites both with and without pMDI. The melt flow index (MFI) decreased with increasing WF content, but increased with increasing KL content. The addition of pMDI caused an increase in the melt viscosity of the PBS/WF and PBS/WF/KL composites, resulting in a decrease in the MFI. The composites had lower thermal stability than neat PBS. The exotherms of the PBS/WF (50/50) composite appeared at a higher temperature than that of the neat PBS, but the PBS/WF/KL (50/50/20) composites had similar exotherms as the neat PBS. The addition of KL caused a decrease in the crystallization rate of PBS.
Highlights
Wood-plastic composite (WPC) materials are constructed of a thermoplastic polymer and wood flour (WF), and are produced by mixing the molten thermoplastic resin and WF through extruding or kneading [1,2,3,4]
The MFI and melt viscosity (MV) of the WPC composites were measured with a melt flow indexer (MFI 4050, Rhopoint Instruments, Ltd., Hastings, UK)
The poly(butylene succinate) (PBS)/WF composites with matrix and the WF.The composites with 2agent phr polymeric diphenylmethane diisocyante (pMDI)
Summary
Wood-plastic composite (WPC) materials are constructed of a thermoplastic polymer and wood flour (WF), and are produced by mixing the molten thermoplastic resin and WF through extruding or kneading [1,2,3,4]. WPC can overcome disadvantages of wood materials such as low processability, vulnerability to damage by blight and harmful insects, and sensitivity to moisture, and can represent the texture of the wood [8,9]. Biodegradable polymers, such as poly(lactic acid) (PLA), poly(butylene succinate) (PBS), and polycaprolactone (PCL) are considered important materials for the development of eco-friendly composites [2,11,12,13]. The lignin addition led to a reduction in the tensile strength of the composite because the lignin is incompatible with most thermoplastic polymers This deterioration in the tensile strength of PCL/KL composites due to the presence of KL has been overcome by adding polymeric diphenylmethane diisocyanate (pMDI) as a coupling agent. The effect of addition of KL and pMDI on the physicomechanical and thermal properties of the PBS/WF composites was investigated
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
