A mesophasic state in poly(vinyltrimethylsilane)

Separation of Mineral Acid Solutions by Membrane Distillation and Thermopervaporation through Porous and Nonporous Membranes

“…This indicates that, in these processes, the charge transfer proceeds via the common mechanism. The charge transfer in the membrane bulk can be explained in terms of the two following mechanisms: (1) movement of delocalized electrons via jumps over neighboring states and (2) movement of ions that acquire mobility in the vicinity of the PVTMS main chain relaxation region. − , …”

“…The TSR of these samples was measured immediately after the plasma treatment at a heating rate of 2 K/min. PVTMS is known to have two high-temperature relaxation transitions near 393 and 443 K, the lower temperature is associated with the glass transition temperature T g ; the melting point is 513 K. − Therefore, in the TSD measurements, a membrane was first heated to 400 K and then was polarized in a field with a voltage of 1000 V/mm at 430 K for 15 min. Then, the membrane was cooled down to the room temperature at a cooling rate of 2 K/min, and the external field was switched off.…”

“…The charge transfer in the membrane bulk can be explained in terms of the two following mechanisms: (1) movement of delocalized electrons via jumps over neighboring states 44 and (2) movement of ions that acquire mobility in the vicinity of the PVTMS main chain relaxation region. [36][37][38]45 The entire body of the experimental data presented in Figure 9 in the θ−Q coordinates indicates that there exists a certain correlation between them. Similar dependence was observed in ref 35 for polyimide films after their low-frequency glow discharge modification.…”

Poly(vinyl trimethylsilane) and block copolymers of vinyl trimethylsilane with isoprene: Anionic polymerization, morphology and gas transport properties

“…The glass transition temperature of poly(1,4-isoprene) is around À80°C [20,21], while the glass transition temperature of PVTMS is reported in the literature in a range from 105-144°C. [22] The thermal behavior of this polymer is more complex due to the existence of possible mesophases [23].…”