Quasielastic Neutron Backscattering Measurements on Highly Permeable GlassyPolynorbornenes
Membrane processes are considered as essential future technology because they have a high potential in energy saving compared to conventional materials separation operations. High performance glassy polymers with a high free volume like Si-substituted addition polynorbornenes are promising candidates. It was argued in the literature that especially fast motional fluctuations at a time scale of pico-to nanoseconds might be responsible for the permselectivity. Besides of the possible applications of these innovative polymers they are interesting model systems for fundamental investigations because of its high free volume and stiff chain structure. It is proposed to investigate and to compare the molecular mobility by quasielastic backscattering spectroscopy for two high-performance polymers PTCNSi1 and PTCNSi2g which have a quite different free volume structure. Therefore, it is expected that the molecular mobility is quite different for both systems.
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SCHOENHALS Andreas; APPEL Markus; Bernhard Frick; SZYMONIAK Paulina Elzbieta and ZORN Reiner. (2020). Quasielastic Neutron Backscattering Measurements on Highly Permeable GlassyPolynorbornenes. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.6-04-278
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