セルロースの安息香酸・テレフタル酸混合芳香族エステル化およびPETグラフト化

概要

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Graft copolymerization of poly(ethylene terephthalate) (PET) to cellulose was attempted via esterification of cellulose with benzoyl chloride and terephthaloyl dichloride. The esterification of cellulose was performed in 8wt% LiCl/DMAc under reflux in N<font size="-1">2</font> at 100°C using pyridine as basic catalyst. Cellulose benzoate terephtalate (CBT), further transformed to chloride form using thionyl chloride, was reacted with ethylene glycol and terephthaloyl dichloride in THF under reflux in N<font size="-1">2</font> at 50°C using pyridine as basic catalyst. Formation of CBT and PET-grafted cellulose (PET-C) was suggested from FTIR spectra. PET-C showed melting transitions between 150 to 190°C and formed mesophase, in spite of the possible remaining of free PET chains.