Potentially biodegradable “short-long” type diol-diacid polyesters with superior crystallizability, tensile modulus and water vapor barrier
作者：Lizhong Zhou, Pengkai Qin, Linbo Wu*, Bo-Geng Li, Philippe Dubois
關鍵字：biodegradable polymers, long-chain polyesters, PE-like polymers, thermal property, mechanical property, gas barrier property
論文來源：期刊
具體來源：ACS Sustainable Chemistry & Engineering 9, 17362-17370, 2021 https://doi.org/10.1021/acssuschemeng.1
發表時間：2021年
Long-chain aliphatic polyesters are potential biodegradable polymers having PE-like structure and properties. To develop biodegradable long-chain polyesters for practical applications, a series of “short-long” type long-chain polyesters, PEsxy (x =2?4, 6, y = 10?16), are designed and synthesized from C2?4,6 short-chain α,ω-diols and C10?16 long-chain α,ω-diacids via melt polycondensation. They showed intrinsic viscosity as high as 0.93?1.64 dL/g and PE-like crystal structure, rapid crystallization, and ductile tensile behavior. Their crystallization and melting temperature showed an increasing trend with diacid chain length and a clear odd?even effect. The highest melting temperature reached 94 °C, and the highest tensile strength reached 53 MPa. Chain lengthdependent biodegradability in soil and hydrolytic degradation under neutral conditions at 30?60 °C was also observed. In comparison with the widely used biodegradable poly(butylene adipateco-terephthalatae) (PBAT) copolyester, these polyesters show comparable tensile strength, ductility, and oxygen barrier performance, but obviously superior and desirable crystallizability, tensile modulus, and water vapor barrier performance.