Surface Energy Of Acrylic Sheet

For glazing applications continuously imposed design loads should not exceed 750 psi 5 2 mpa at 73 f 23 c.

Surface energy of acrylic sheet.

Although the tensile strength of acrylite ff sheet is 10 000 psi 69 mpa at room temperature astm d 638 stress crazing can be caused by continuous loads below this value. The measured surface energy 27 to 31 mj m 2 was sensible as surmised from their structure. Historically low surface energy plastics required some type of surface treatment such as abrasion flame corona plasma chemical treatment or primers prior to bonding. Acrylic acid content increases the surface energy threshold adhesion energy and adhesion hysteresis of psa lns.

Some sources quote the critical surface tension in units of mn m which is equivalent to surface energy. Different forms of surface preparation can increase the surface energy which increases wetting. Spreading a b c where. The surface energy of the plastic either allows or prevents wetting the surface.

The dynamics of wetting watch video are described below. The first table shows values for low and high surface energy solid materials whilst the second table. If the material surface energy is too high then the paint ink or coating may bleed or be difficult to control. Surface energy values usually have the units of mj m 2.

300 lse low surface energy acrylic 300 f bonds well to lse surfaces outstanding adhesion to low surface energy plastics powder coated paints and lightly oiled metals good chemical and humidity resistance. Therefore the surface tension of the liquid and the surface energy of the material must be matched for the application.