Glass strengthening by polymeric coatings: combined effect of mechanical properties and confinement

Abstract

We consider the impact of the mechanical behaviour of polymeric coatings on glass strengthening. We have performed rupture stress measurements and compared the strengthening measured in the rubbery state and the glassy state. We evidence a moderate decrease of the strengthening when the temperature exceeds the glass transition temperature of the coating. Based on the predictions of crack bridging models, we show that the limited difference of strengthening between glassy and rubbery states can be understood if confinement of the polymer inside the crack is taken into account. Similarly, our results suggest that confinement severely limits the shear deformation of polymeric coatings and suppresses viscoelastic dissipation.

Chemically Heterogeneous Nanowrinkling of Polymer Surfaces Induced by Low-Energy Cluster Implantation

“…At room temperature, the polymers labeled as D230 and D400 are defined in a glassy state (E = 10 GPa), whereas ED2003 and ED600 are defined in a rubbery state (E = 10 MPa), in agreement with prior studies of such systems. 28 This variation in compliance of the substrates makes it possible to study its influence on the seeding and growth of magnetron-sputtered Cr.…”

“…The epoxy network was prepared as per the protocol described in the study of Teisseire et al 28 A stoichiometric solution of resin and curing agents was thoroughly mixed at 55 ± 5 °C on a hot plate for 30 min. The mixture was degassed in low vacuum (≈1 mbar) at 50 °C for 1 h and was poured into 75 × 26 mm sized cavities (microscope slide shape) in a silicone mold (Ladd Research Industries).…”

Strengthening mechanism of cover glass by Sol‐Gel SiO2 coating

“…14,15 At present, for chemically tempered glass, surface coating approach is an effective method to fill and repair surface microcracks, so it attracts much scientific interests. [17][18][19][20][21] Generally, coating process needs to meet the following basic requirements: (a) The curing temperature of coating shall not exceed 290°C, to avoid stress relaxation at high temperature 15,16 and (b) the coating shall be transparent, hard enough, and cohesive to the glass surface to minimize interface defects. Coatings that meet the above requirements can be specifically divided into two categories: (a) organic films, such as epoxy resin film 22 , and (b) inorganic film, such as silica film.…”

Improvement of the Optical Properties of Sandblasted Glass by Depositing Acrylic Coatings

“…Deposition of coatings is more attractive economically and technically in strengthening damaged glasses [9,11]. In addition to the mechanical strengthening [10][11][12][13][14][15][16], other additional optical or hydrophobic attributes can be acquired [9]. Among the known deposition techniques, spraying technique shows several advantages.…”