title: High molecular weight poly(butylene succinate-co-butylene furandicarboxylate) copolyesters: from catalyzed polycondensation reaction to thermomechanical properties.
abstract: Novel potentially biobased aliphatic-aromatic copolyesters poly(butylene succinate-co-butylene furandicarboxylate) (PBSFs) in full composition range were successfully synthesized from 2,5-furandicarboxylic acid (FA), succinic acid (SA), and 1,4-butanediol (BDO) via an esterification and polycondensation process using tetrabutyl titanate (TBT) or TBT/La(acac)(3) as catalyst. The copolyesters were characterized by size exclusion chromatography (SEC), Fourier transform infrared (FTIR), (1)H NMR, differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA), and their tensile properties were also evaluated. The weight average molecular weight (M(w)) ranges from 39,000 to 89,000 g/mol. The copolyesters are random copolymers whose composition is well controlled by the feed ratio of the diacid monomers. PBSFs have excellent thermal stability. The glass transition temperature (T(g)) increases continuously with φ(BF) and agrees well with the Fox equation. The crystallizability and T(m) decrease with increasing butylene furandicarboxylate (BF) unit content (φ(BF)) from 0 to 40 mol %, but rise again at φ(BF) of 50-100 mol %. Consequently, the tensile modulus and strength decrease, and the elongation at break increases with φ(BF) in the range of 0-40 mol %. At higher φ(BF), the modulus and strength increase and the ultimate elongation decreases. Thus, depending on φ(BF), the structure and properties of PBSFs can be tuned ranging from crystalline polymers possessing good tensile modulus (360-1800 MPa) and strength (20-35 MPa) to nearly amorphous polymer of low T(g) and high elongation (~600%), and therefore they may find applications in thermoplastics as well as elastomers or impact modifiers.
authors: State Key Laboratory of Chemical Engineering at ZJU, Department of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China.
authors: Linbo
authors: L
authors: Wu
authors: Rosica
authors: R
authors: Mincheva
authors: Yutao
authors: Y
authors: Xu
authors: Jean-Marie
authors: JM
authors: Raquez
authors: Philippe
authors: P
authors: Dubois
mesh_terms: D001672:Biocompatible Materials / Q000138:chemical synthesis*; D002072:Butylene Glycols / Q000737:chemistry*; D002152:Calorimetry, Differential Scanning; D002850:Chromatography, Gel; D003460:Crystallization; D003998:Dicarboxylic Acids / Q000737:chemistry*; D005663:Furans / Q000737:chemistry*; D006358:Hot Temperature; D009682:Magnetic Resonance Spectroscopy; D008970:Molecular Weight; D011091:Polyesters / Q000138:chemical synthesis*; D017550:Spectroscopy, Fourier Transform Infrared; D019802:Succinic Acid / Q000737:chemistry*; D013718:Tensile Strength; D013818:Thermogravimetry; D014025:Titanium / Q000737:chemistry
chemical_list: D001672:Biocompatible Materials; D002072:Butylene Glycols; D003998:Dicarboxylic Acids; D005663:Furans; D011091:Polyesters; C551400:2,5-furandicarboxylic acid; C039681:1,4-butanediol; D019802:Succinic Acid; D014025:Titanium