AC Impedance and FTIR Studies of PVA-ZnCl2 Based Solid Polymer Electrolytes

Solid Polymer electrolytes (SPEs) comprising of poly(vinyl alcohol) (PVA)added Zinc chloride (ZnCl2) systems have been prepared via solvent castingtechnique. The prepared samples have been subjected to AC impedancespectroscopic analysis and Fourier Transform Infrared Spectroscopy (FTIR)studies. Maximum ionic conductivity of 3.91949*10-7 Scm-1 was achievedfor 60 wt% of PVA and 40wt% of ZnCl2 system at room temperature.The structural changes and hence the complex formation between theconstituents used in the present study has been confirmed through FTIRanalysis

Dimensional Issues in Stereolithography

New stereolithography photopolymers have recently been introduced that provide a wider range of functional properties similar to those of high-density polyethylene. One of the important criteria for these materials is the dimensional accuracy and stability in end-use applications as mold masters or the actual functional parts. This work investigates the dimensional stability of one of these new materials with varying amounts of exposure during build. The effect of aging on the part dimensions is reported. The result of environmental humidity extremes at ambient temperature on part dimensions is investigated and compared for parts made from two different families of stereolithography resins, namely DuPont Somos® 7100 and Somos® 8100.Mechanical Engineerin