Investigation on Structure and Thermomechanical Processing of Biobased Polymer Blends

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 re...

Full description

Saved in:
Bibliographic Details
Published in:Journal of polymers and the environment 2017-09, Vol.25 (3), p.750-758
Main Authors: Cicala, Gianluca, Latteri, Alberta, Saccullo, Giuseppe, Recca, Giuseppe, Sciortino, Luca, Lebioda, Sascha, Saake, Bodo
Format: Article
Language:English
Subjects:
Chemistry
Chemistry and Materials Science
Degradation
Environmental Chemistry
Environmental Engineering/Biotechnology
Fractionation
Industrial Chemistry/Chemical Engineering
Lignin
Materials Science
Modulus of elasticity
NMR
Nuclear magnetic resonance
Original Paper
Polylactic acid
Polymer blends
Polymer Sciences
Polymers
Size exclusion chromatography
Softwoods
Stability analysis
Tensile properties
Tensile strength
Thermodynamic properties
Thermomechanical treatment
Ultimate tensile strength
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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 MPa while the tensile modulus dropped from 5.3 to 4.2 GPa. The degradation behavior was explained in terms of the PLA degradation enhanced by the presence of the natural constituents in the blend.
ISSN:1566-2543
1572-8900
1572-8919
DOI:10.1007/s10924-016-0857-5