Elastomer Structure/property Relations Investigated Using Deuterium-NMR

2H-NMR data 2H-NMR observations 2H-NMR spectra 90°-pulse experiment average axis chains dissolved Chapter Chem component compressed compressed networks decreases density matrix deuterated deuterium deuterium nuclei deuterons effective crosslinks elastic chains elastic modulus elastic networks elastomer structure end-to-end vector endlinking reactant concentrations equation equilibrium swelling external magnetic field fraction of elastic Herz induced isotropic lab frame Macromolecules magnetic field magnetization observed Mn,el mole monofunctional chains non-deuterated B2 nuclear magnetic moments nuclear spin angular number-average molecular weight obtained from swelling oligomers orientational coupling PDMS networks PDMS(d pendant and elastic pendant chains perpendicular to Bo plane perpendicular polydimethylsiloxane polymer volume fraction precession precursor chains probe chains produced by endlinking pulse quadrupolar frequency distribution rotating frame segment anisotropy segment motion segment order parameter segment orientation siloxane spectrum spin echo experiment statistical model structural parameters swelling measurements time-evolution of magnetization toluene transverse dephasing data weight fraction weight of elastic Wsol Y-axis z-axis