ANALYSIS OF THERMOSTABILITY, SWELLING IN SOLVENT AND MACROSTRUCTURE OF EPOXY / 1-10 WEIGHT% SILICA..

The current study looks at the resistive properties of a DGEBA-based epoxy polymer with scattered silica. A thorough investigation of the influence of silica PK300 concentration (S=300 m2g, average particle size 20 nm) on the strength and durability of epoxy-polymer, as well as the nature of its thermal disintegration, was conducted. The presence of optimal and poor PK300 concentrations was demonstrated. At 1 wt percent, and especially at 5 wt percent, a rise in the temperature of maximal intense destruction is detected in composite mass spectra. CO2, H2O, CO, and aldehydes, ketones, and aromatic fragments of epoxy-polymer are the fundamental products of heat degradation. Filling can alter the types and ratio of basic peak intensity, notably at 5% wt. Filling allowed the temperature of the composite's smoke-emission to rise from 360oC (for unfilled) to 390-400oC and even 420oC. (for 5 wt percent ). Thermogravimetric measurement reveals a change in polymer destruction after filling. The most effective resistance to ink-solvent penetration is demonstrated by epoxy-composites with 4 and 4 – 5 wt percent, respectively. Epoxy-composites with 2 and 5% weight percent showed the best adherence to fibreglass. Concentration effects are conceivable as a result of filler aggregation in the polymer, which modifies the structure of the polymer network and the amount of defects after filling.

Please see the link :- https://www.ikprress.org/index.php/JACSI/article/view/2928