Supramolecular Structure for Large Strain Dissipation and Outstanding Impact Resistance in Polyvinylbutyral

Abstract

For decades, poly(vinylbutyral) (PVB) has been the polymer of choice to improve the impact resistance of laminated glass. PVB presents large rupture strain, large tensile strength and excellent dissipative properties. Here we investigate the relation between macromolecular structure and mechanical properties of plasticised PVB by combining large strain tensile experiments with calorimetry, X-ray and birefringence measurements. We find that the mechanical response is dominated by creep and that this plastic-like flow can effectively be described by a strain dependent viscosity. The commonalities with other toughened polymeric materials are outlined, and especially the role played by phase separated domains with weaker physical bonds. These results could help optimize polymer design for toughness and impact applications.

Adhesion rupture in laminated glass: influence of adhesion on the energy dissipation mechanisms

“…Therefore, the tensile response of PVB is sensitive to the strain rate: PVB becomes stiffer and more plastic-like when the strain rate increases (Figure 10a). Recently, Elzière et al (2019) have described the rheological properties of plasticized PVB with a non-linear viscoelasticity model, which accounts for both the pronounced hysteresis and the plastic-like behavior at high strain-rate.…”

A low seepage threshold and super‐toughness of polybutylene succinate‐based composites with double percolation structure: Synergy of multi‐wall carbon nanotubes and polyvinyl butyral

“…For PVB including main two components of vinylalcohol and vinylbutyral, 43 it could obtain a good compatibility with PBS matrix via melt‐blending, as shown in Figure 8. The compatibility was a beneficial and critical condition to improve impact toughness of the PBS‐based composite.…”

Extended time–temperature rheology of polyvinyl butyral (PVB)

“…This polymer film is comprised by three monomers, namely, vinylacetate (1-2%wt), vinylalcohol (18-20%wt), and vinylbutyral (80%wt). As detailed in the literature, a plasticizer molecule, namely, triethylene glycol bis (2ethylhexanoate) is also used in a concentration of about 20-30%wt leading to a 𝑇 𝑔 of around 20°C-30°C [7,10]. Meanwhile, the film's polydispersity index (PDI) from Size Exclusion Chromatography (SEC) is 1.42 while 𝑀 𝑤 is ∼200 kg mol -1 [7].…”