Membrane Creep of Anisotropic Plates

Dynamic Mechanical, DSC, and Electrical Investigations on Nano Al2O3Filled PVA:NH4SCN:DMSO Polymer Composite Dried Gel Electrolytes

“…The loss spectra of the pristine complex show a well-defined peak (P 2 ) around 120 C. This can be assigned to the presence of bound water in the pristine system. Existence of this water was shown earlier by a few researchers [16,[24][25] and also observed in DSC examination of the pristine electrolyte in the present investigation (to be discussed later). Another plausible reason may be the interaction of salt with the host polymer, leading to the formation of the PVA-NH 4 SCN complex [16].…”

“…Existence of this water was shown earlier by a few researchers [16,[24][25] and also observed in DSC examination of the pristine electrolyte in the present investigation (to be discussed later). Another plausible reason may be the interaction of salt with the host polymer, leading to the formation of the PVA-NH 4 SCN complex [16]. This relaxation peak shifts to higher temperature upon increase of filler content (136 C for 2 wt% composite electrolyte).…”

“…(Table 1). Pure PVA powder used in the present investigation possesses a glass transition of 90 C and has been reported in one of our earlier papers [16]. This Tg is known to shift to lower temperature because of complexation of NH 4 SCN with PVA [16,17].…”

“…Pure PVA powder used in the present investigation possesses a glass transition of 90 C and has been reported in one of our earlier papers [16]. This Tg is known to shift to lower temperature because of complexation of NH 4 SCN with PVA [16,17]. In contrast to these reports, the first peak (P 1 ) correlated to dynamic Tg is seen to increase subsequent to nano filler addition (Table 1).…”

“…Though a variety of polymer hosts like PEO, PMMA, PVC, etc., have been used in the development of composite polymer electrolytes, polymeric host PVA has been prominently studied due to its excellent biocompatibility, electrochemical stability, and solventswollen ability [15]. Further, this polymer contains hydroxyl groups attached to methane carbons, which are active sites for complexation with different salts and acids [9,16]. Owing to the possibility of achieving maximal ionic conduction with protons=NH þ 4 ions as transporting specie in gel electrolyte systems, impetus has also been given to the development of proton-conducting electrolytes in recent times.…”