The Thermal Evaluation of Formvar Resin

Abstract

Deterioration of plastic insulation is a highly complex process influenced by many factors including time, temperature, plasticizer content, and changes both in molecular weight and in basic chemical character. Past methods of evaluation have, accordingly, been empirical ones using accelerated aging tests, but no method has been available for predicting the life of insulation under service conditions. A critical evaluation is undertaken of the electrical properties of formvar resin, an insulant of proven superiority, and the values determined serve as a key to predicting the life of insulation in general. Data thus obtained are presented graphically for evaluating insulation found in practice.

Ultra-thin and strong formvar-based membranes with controlled porosity for micro- and nano-scale systems

“…This confirms the compatibility reported in the SDS from Sigma-Aldrich stating Formvar is not compatible with strong acids. Some of the chemicals used, such as kerosene, have been previously tested using different methodologies and our findings are in good agreement with previously reported ones [7].…”

“…This polymer was found to be structurally stable at thickness of 50 nm, hydrophilic and oleophilic, inert to most acids and solvents, and can be made into porous structures [3]. Additionally, formvar was found to have exceptional radiation tolerance and possesses interesting chemical, thermal and electrical properties [4][5][6][7]. Microfiltration is a process based around the osmotic pressure differential of two fluids wetting to and separated by a filter.…”

The Manufacture, Properties, and Uses of Polyvinyl Formal

“…In comparison to other resins, polyvinyl formal uniquely combines rigidity, toughness, and dimen- (16). Its electrical properties have already been reported (17,18). Table III lists pure solvents of the 7/95 and 15/95 types, together with a partial list of solvents for higher acetate types.…”