Regensburg 2016 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 34: Crystallization, Nucleation, Self Assembly I (joint session CPP/DY, organized by CPP)
CPP 34.6: Vortrag
Mittwoch, 9. März 2016, 11:15–11:30, H42
Crystallization behavior of nanocomposites based on Polylactide - Rigid Amorphous Phase due to the Nanofiller — •Jing Leng1, De-Yi Wang2, Andreas Wurm3, Christoph Schick3, and Andreas Schönhals1 — 1Bundesanstalt für Materialforschung und prüfung — 2IMDEA Materials Institute — 3University of Rostock, Institute of Physics
Two kinds of synthesized NiAl (NiAl-LDH) and MgAl (MgAl-LDH) layered double hydroxides were melt blended with commercial polylactide to prepare different polymer based nanocomposites. The MgAl-LDH based nanocomposites and NiAl-LDH based nanocomposites have a different but mixed intercalated / exfoliated structure. Based on the different structures, the crystallization behaviors of polymer based nanocomposites were investigated by differential scanning calorimetry (DSC) and temperature modulated differential scanning calorimetry (TMDSC) specificly where the heating and cooling rates were varied in a considerably wide range. In a first step, the cooling rate where crystallization can be completely surpressed is estimated. In a second step, based on a specified temperature program the crystalline fraction (CF), the rigid amorphous fraction (RAF) and the mobile amorphous fraction (MAF) were calculated from the the enthalpy and specific heat capacity in dependence on the concentration of the nanofiller. The rigid amorphous fraction was considered as resulting from the the crystallites and the nanofiller. For the first time both fractions were calculated quantitatively without any additional assumption.