Synthesis, properties and biodegradation of periodic copolyesters composed of hydroxy acids, ethylene glycol, and terephthalic acid
作者： Yuushou Nakayama , Wataru Yagumo , Ryo Tanaka , Takeshi Shiono , Kei Inumaru
DOI: 10.1016/J.POLYMDEGRADSTAB.2020.109095
关键词:
摘要: Abstract Aromatic polyesters such as poly(ethylene terephthalate) (PET), poly(trimethylene (PTT) and poly(butylene (PBT) are widely used all over the world due to their excellent physical properties. However, degradation in environment is very slow environmental load of wastes a potential problem. On other hand, poly( l -lactic acid) (PLLA) poly(glycolic (PGA) have attracted attention for biodegradability. We expected that periodic copolyesters composed hydroxy acids, ethylene glycol, terephthalic acid can be biodegradable polymer with relatively high melting points. In this study, series novel was synthesized properties biodegradabilities were investigated. The 2:1 condensation products (LEL GEG) (LA) or glycolic (GA) glycol from reaction potassium salt LA GA 1,2-dibromoethane. Then, polycondensation LEL GEG chloride derivatives dicarboxylic acids (terephthalic acid, 2,5-furandicarboxylic 2,6-naphthalenedicarboxylic adipic performed produce poly((ethylene diglycolate) (poly(GEGT)) di( -lactate)) (poly(LELT)). most units poly(LELT) amorphous. contrast, exhibited temperature (e.g. Tm = 209 °C poly(GEGT)). preliminary tests poly(GEGT) performed. obtained showed biodegradability seawater at 27 °C.
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