TY  - JOUR
AU  - Weidner, Maren Christin
AU  - Evenson, Zach
AU  - Zamponi, Michaela
AU  - Possart, Wulff
TI  - Molecular Motion in Viscous DGEBA with Nanoparticles as Seen by Quasi-Elastic Neutron Scattering
JO  - Macromolecular chemistry and physics
VL  - 220
IS  - 1
SN  - 1022-1352
CY  - Weinheim
PB  - Wiley-VCH
M1  - FZJ-2018-07778
SP  - 1800275
PY  - 2019
N1  - Special Issue: Dedicated to Prof. Hatsuo Ishida on the Occasion of His 70th Birthday
AB  - Pure and filled epoxies are widely used in industry. Nanocomposites especially are affected by interphase regions where properties deviate from bulk. The study of molecular mobility in epoxy monomers is a first step to understanding the molecular dynamics in nanocomposites and their effect on crosslinking in epoxy networks. Here, quasi‐elastic neutron scattering is used to disentangle the molecular motions of monomeric diglycidylether of Bisphenol A (DGEBA) and a suspension of zeolite nanoparticles in DGEBA on a timescale from 2 ps to 5.5 ns. Regarding molecular transport of DGEBA inside the suspension, the particles have no impact on the faster rotational motions. A combination of neutron time‐of‐flight and backscattering spectroscopy reveals a pronounced hindrance of DGEBA molecular dynamics on/in the zeolite particles along with a new type of molecular motion occurring on intermediate timescales. That localized motion is attributed to jump diffusion motions, emanating from interphase effects at the zeolite particles.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000455042300006
DO  - DOI:10.1002/macp.201800275
UR  - https://juser.fz-juelich.de/record/858952
ER  -