NEW PLASTIC MATERIALS STARTING FROM RENEWABLE RESOURCES – SYNTHESIS AND PROPERTIES

摘要

A series of cellulose esters (CEs) were obtained by grafting aliphatic acid chlorides (carbon chainlength ranging from 8C to 18C) onto cellulose backbone, in a homogeneous lithium chloride/N,N-dimethylacetamide(LiCl/DMAc) medium. These CEs were characterized by FT-IR and 1H-NMR spectroscopies and were convertedinto films by casting. Then, they were submitted to thermal, mechanical, thermomechanical and structural analysis,using Differencial Scanning Calorimetry (DSC), uniaxial tensile tests, Dynamic Mechanical Thermal Analysis(DMTA) and X-Ray diffraction, respectively. The aim of this study was to establish a correlation between theevolution of such physical properties and the length of the aliphatic grafted side chain.