Pendant chain dynamics in model pdms networks probed by spin diffusion experiments

ACOSTA RH; FRANZONI M; VILLAR MA; EM VALLES; DA VEGA; MONTI GA

Angra Dos Reis

Workshop; 13th Nuclear Magnetic Resonance Users Meeting; 2011

Nuclear Magnetic Resonance Users Meeting

Polydimethylsiloxane (PDMS) networks are ideal systems to probe chain dynamics, however, in the context of spin diffusion experiments no work has been carried out to our knowledge to the moment. The usual approach for determination of domain size probed by interaction between different structures does not apply as the whole network, entangled and dangling chains have the same chemical structure. This means that the whole sample has the same spectroscopic components. In this work we propose to use the differences between transverse relaxation times to generate the both the generation of the magnetization gradient and the determination of the spin diffusion.