The mechanical behavior of glass is linear until breakage. However, the polymeric interlayers are viscoelastic or viscoplastic materials, which means that their mechanical response has an elastic and a viscous component: the elastic response is proportional to the strain, in contrast to the viscous component which is proportional to the strain rate. The mechanical response of polymeric interlayers is time – and temperature-dependant.
Therefore, this research is focused on determining the relationship between the chemical properties of different interlayers (Polyvinyl butyral, Ethylene vinyl acetate, Ionoplast) and their mechanical resistance. Mechanical properties for sure could be explained by chemical reactions within the production and the process of exploitation mainly focused on the lamination process of laminated safety glass with EVA. This indicates an interdisciplinary point of view and explanation.
Understanding the chemistry background might be challenging but very valuable not just for understanding EVA polymer but also for understanding how interlayer in LSG and LG behaves in general.
Parametric analyses presented in this research showed different behavior of the interlayer, construction response, and mechanical resistance in LSG which was exposed to different load conditions and temperature changes.
This paper focuses mainly on EVA interlayer because based on the results so far it has shown promising results in comparison to PVB interlayer which is more common in engineering practice. This research will present advantages and disadvantages for each different load type regarding interlayer chemical response.