Regensburg 2013 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 12: Poster: Nanoparticles and Composite Materials
CPP 12.14: Poster
Montag, 11. März 2013, 17:30–19:30, Poster C
Structure-Property relationships of Nanocomposites Based on Polylactide and Layered Double Hydroxides — •Jing Leng1, Purv Purohit1, De-Yi Wang2,3, and Andreas Schoenhals1 — 1BAM Federal Institute for Materials Research and Testing, Unter den Eichen 87, 12205 Berlin, Germany — 2Madrid Institute for Advanced Studies of Materials, C/Eric Kandel 2, 28906 Getafe, Madrid, Spain — 3Center for Degradable and Flame-Retardant Polymeric Materials (ERCEPM-MoE), College of Chemistry, Sichuan University, Chengdu 610064, China
Abstract: Polymer based nanocomposites prepared by melt blending of synthesized NiAl layered double hydroxides (NiAl-LDH) and polylactide (PLA) were investigated by combination of differential scanning calorimetry (DSC), small- and wide-angle X-ray scattering (SAXS and WAXS) and broadband dielectric spectroscopy (BDS). In the case of NiAl-LDH based nanocomposites the degree of crystallinity at first increases and then decreases as a function of LDH concentration. By extrapolation a limiting concentration of NiAl-LDH ca.15% where the crystallization of PLA is completely suppressed by the nanofiller. The dielectric spectra of the nanocomposites show several relaxation processes related to dynamic glass transition and localized fluctuations were identified and analyzed in detail to understand the morphology. The results of the PLA based nanocomposites with NiAl-LDH as nanofillers were further compared with PLA based nanocomposites with MgAl-LDH as nanofillers.