Journal
COMPOSITES PART B-ENGINEERING
Volume 255, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesb.2023.110628
Keywords
Lignin-derived plastic; Lignosulfonate; Nanostructure; Pilot-scale synthesis; Polyethylene glycol; Small-angle X-ray scattering (SAXS)
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A lignosulfonate-derived thermoplastic was successfully synthesized through a grafting reaction with a polyethylene glycol derivative. The resulting grafted polymer, LS-g-PEG, exhibited improved thermo-moldability and mechanical properties compared to pure LS and an LS/phenylPEG blend. Small-angle X-ray scattering analysis revealed a nano-scale homogeneous lamellar structure in LS-g-PEG, while the LS/PEG blend showed phase separation. The nano-scale structure of LS-g-PEG contributed to its macroscopic homogeneity, leading to enhanced thermo-moldability and mechanical properties.
A lignosulfonate (LS)-derived thermoplastic was synthesized using a simple and scalable grafting reaction with a polyethylene glycol derivative (phenylPEG). The grafted polymer, polyethylene glycol-grafted LS (LS-g-PEG), had improved thermo-moldability and mechanical properties in a bending test, compared with pure LS and an LS/phenylPEG (LS/PEG) blend. Small-angle X-ray scattering analyses showed that LS-g-PEG had a nano-scale (20-30 nm) homogeneous lamellar structure, whereas the LS/PEG blend was separated into an LS-rich phase and a crystalline phenylPEG lamellar phase. The nano-scale structure of LS-g-PEG provides macroscopic homogeneity, as confirmed by fracture surface observation and polarized microscopy analysis; its high homogeneity resulted in enhanced thermo-moldability and mechanical properties, compared with an LS/PEG blend.
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