Effect Of Temperature On Acrylic Display Stand
Many properties of plexiglass (especially physical and mechanical properties) show a strong dependence on temperature. The national standard (GB / 7134-1996) requires that the testing of various properties of plexiglass must be performed at the specified temperature (23 ± 200C).
(1) Effect of temperature on tensile strength and elastic modulus of plexiglass
As the temperature increases, the tensile strength and tensile elastic modulus decrease approximately linearly. The reason is that as the temperature increases, the mobility of the polymer material segment increases, and the transition from the glassy state to the highly elastic and viscous fluid state gradually occurs. Macroscopically, it shows increased flexibility, decreased strength and elastic modulus.
(2) Effect of temperature on elongation of plexiglass
As the temperature rises, the elongation at break of the plexiglass during brittle fracture gradually increases. At 60 ° C, the elongation at break of the plexiglass reaches 5.6%. When it exceeds a certain temperature, the plexiglass begins to soften and the stretching process is Yield to destruction. Relationship between temperature and elongation at break and yield elongation of plexiglass.
(3) Effect of temperature on impact strength of plexiglass with different thickness
Temperature has a similar effect on the impact properties of plexiglass. As the temperature rises, the movement of the plexiglass molecular chain segments increases, showing macroscopically increased flexibility and increased impact strength.
(4) the influence of temperature and other factors on the hardness of plexiglass
The hardness of plexiglass decreases with increasing temperature. In addition, the larger the load value used in measuring the hardness, the lower the measured hardness value. Within a certain range, the greater the thickness of the plexiglass sheet, the higher the measured value; but when the thickness is increased to a certain extent, the measured hardness value no longer significantly increases.
(5) Effect of temperature on Poisson's ratio of plexiglass
Temperature also has a certain effect on the Poisson's ratio of plexiglass. The higher the temperature, the larger the Poisson's ratio.
