The structure and composition of a biobased polymer blend with wood like appearance was studied. The effects of processing time for mixing at 190 °C was investigated. The structure of the blend was unveiled combining fractionation techniques with size exclusion chromatography and nuclear magnetic resonance analysis. The material was found to be a blend of polylactide (PLA) polymer with 15.4 wt% ground softwood and 5 wt% soda lignin. The findings about composition supported the explanation of the thermal behavior and the processing stability analysis. The blend showed tensile properties degradation after mixing at 190 °C for 25 min. The ultimate tensile strength dropped from 29.75 to 4.85
Investigation on Structure and Thermomechanical Processing of Biobased Polymer Blends
CICALA, Gianluca
;LATTERI, ALBERTA;
2016
Abstract
The structure and composition of a biobased polymer blend with wood like appearance was studied. The effects of processing time for mixing at 190 °C was investigated. The structure of the blend was unveiled combining fractionation techniques with size exclusion chromatography and nuclear magnetic resonance analysis. The material was found to be a blend of polylactide (PLA) polymer with 15.4 wt% ground softwood and 5 wt% soda lignin. The findings about composition supported the explanation of the thermal behavior and the processing stability analysis. The blend showed tensile properties degradation after mixing at 190 °C for 25 min. The ultimate tensile strength dropped from 29.75 to 4.85I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
