Synthesis and characterization of novel biobased thermoplastic polyester elastomers

5^th World Congress on Materials Science & Engineering

June 13-15, 2016 Alicante, Spain

Junhui Ji, Gexia Wang and Wei Zhang

The Chinese Academy of Sciences, P.R. China

Posters & Accepted Abstracts: J Material Sci Eng

Abstract :

Thermoplastic polyester elastomer (TPEE) is a new type of thermoplastic elastomer, which not only combines the characteristics of plastics and rubber, but also has the advantages of easy design and synthesis. Although the commercial growth of TPEE has continuously increased in the past few decades, most of TPEE were chosen PBT as the hard segment, seldom TPEE product concerned about bio-based poly(butylene furandicarboxylate) (PBF) polyester. In our work, a series of novel 2,5-furandicarboxylic acid based copolyesters, poly(butylene furandicarboxylate)-b-poly(tetramethylene glycol) (PBF-PTMG), containing different contents of PTMG were synthesized through a direct esterification melt polycondensation method. We selected the crystallized PBF as hard segment and amorphous PBF and PTMG as soft segments. The copolymers were characterized by 1HNMR, GPC, DSC, POM, XRD, TGA and tensile strength measurements. As the content of PTMG segments increased, the glass transition temperature (Tg), the melting temperature (Tm), the crystallization temperature (Tc) and the crystallization ability of these copolymers decreased gradually, while their crystal structure changed little. For mechanical properties, the copolymers exhibited the characteristics of elastomers, showing good stress at break (16�26 MPa) and outstanding elongation at break (381�832%). The copolymers had greatly enhanced elasticity and flexibility properties as the content of PTMG segments increased, and the thermal annealing enhanced their tensile properties due to the more crystallinity and better regularity of PBF segments. Moreover, the TGA results revealed that PBF-PTMG copolymers had excellent thermal stability. Therefore, as novel bio-based copolymers, they might find applications in thermoplastics as well as elastomers.

Biography :

Email: jhji@mail.ipc.ac.cn