TY - JOUR A1 - Herrmann, Volker A1 - Moldovan, Dumitrita A1 - Fechete, Radu A1 - Demco, Dan Eugen A1 - Culea, Eugen A1 - Blümich, Bernhard A1 - Heinz, Manfred T1 - Heterogeneity of Nanofilled EPDM Elastomers Investigated by Inverse Laplace Transform 1H NMR Relaxometry and Rheometry JF - Macromolecular Chemistry and Physics N2 - The heterogeneous effects due to filler interactions and chain dynamics of reinforcing nano-filler particles were characterized on a series of filled EPDM elastomers using the Payne effect and low field NMR, 1H transverse (T2), longitudinal (T1) and longitudinal in rotating frame (T1ρ) relaxation time measurements. Measurement of the Payne effect and NMR relaxation curves were used to obtain the distribution of filler/filler interactions and chain dynamics by one-dimensional Laplace inversion. Distributions of shear-strain constants in the Payne effect reveal the existence of weak, medium and strong filler/filler interactions which were correlated to filler properties and content. The analysis of relaxation-time distributions leads to the identification of multimodal polymer network dynamics. Y1 - 2010 U6 - https://doi.org/https://doi.org/10.1002/macp.201000086 VL - 211 IS - 14 SP - 1579 EP - 1594 ER - TY - JOUR A1 - Herrmann, Volker A1 - Moldovan, Dumitrita A1 - Fechete, Radu A1 - Demco, Dan Eugen A1 - Culea, Eugen A1 - Blümich, Bernhard A1 - Heinz, Manfred T1 - The heterogeneity of segmental dynamics of filled EPDM by 1H transverse relaxation NMR JF - J. Magn. Res. Y1 - 2011 U6 - https://doi.org/https://doi.org/10.1016/j.jmr.2010.10.019 VL - 208 IS - 1 SP - 156 EP - 162 ER -