Synthesis and Properties of Fully Bio-based Polyester Hot-melt Adhesive
Using bio-based 2,5-furandicarboxylic acid(FDCA),oil-based hydrogenated dimer acid(Pripol 1009),and bio-based 1,4-butanediol(bio-BDO)as raw materials,a poly(2,5-furandicarboxylic acid butanediol ester-co-hydrogenated dimer acid butanediol ester)(PBDF-20)thermoplastic polyester hot melt adhesive was prepared through melt polycondensation method.This adhesive was then applied in the wood processing field,and various methods were employed to characterize the polyester and plywood.The results showed that the polyester was a semi-crystalline polymer with a nano-scale microphase separation structure,where the dispersed phase had a long period of 14.3 nm.Its glass transition temperature and melting point were-12.8℃and 148.6℃,respectively.The tensile strength and elongation at break were 22.6 MPa and 528％,respectively.The bonding strength of the poplar plywood bonded with PBDF-20 as adhesive met the requirements of Class Ⅰ plywood in terms of bonding strength,and the formaldehyde emission was less than 0.025 mg/L,complying with the ENF grade standard.
microphase separationthermoplastic polyestertype Ⅰ plywoodENF grade standard
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