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Two properties of plexiglass

Categories: Industry newsStars: 3Stars Visit: - Release time: 2019-12-27 15:55:00
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 When it comes to the two major properties of plexiglass, there is no doubt that they are physical properties and chemical properties. So let's have a brief understanding of the two properties of plexiglass today, and welcome all interested friends to visit our company and factory at any time, and look forward to your visit!

physical property
Plexiglass has good comprehensive mechanical properties. It ranks in the forefront of general plastics. Its tensile strength, bending strength and compression strength are higher than polyolefin, polystyrene and PVC. Its impact toughness is poor, but it is also slightly better than polystyrene. The mechanical properties of cast PMMA (such as PMMA for aviation) such as stretching, bending and compression are higher, which can reach the level of engineering plastics such as polyamide and polycarbonate.
Generally speaking, the tensile strength of plexiglass can reach 50-77mpa, and the bending strength can reach 90-130mpa. The upper limit of these performance data has reached or even exceeded some engineering plastics. Its elongation at break is only 2% - 3%, so its mechanical properties are basically hard and brittle plastic with notch sensitivity. It is easy to crack under stress, but the fracture is not as sharp and uneven as polystyrene and ordinary inorganic glass. 40 ℃ is a second-order transition temperature, which is equivalent to the temperature at which side methyl begins to move. When the temperature is over 40 ℃, the toughness and ductility of the material are improved. But the surface hardness of plexiglass is low, so it is easy to scratch.
The strength of PMMA is also related to the time of stress action. With the increase of action time, the strength decreases. The mechanical properties and notch sensitivity of the PMMA (directional PMMA) were improved.
The heat resistance of plexiglass is not high. Although its glass transition temperature reaches 104 ℃, the highest continuous use temperature changes between 65 ℃ - 95 ℃ with different working conditions. The temperature of thermal deformation is about 96 ℃ (1.18mpa), and Vicat softening point is about 113 ℃. The thermal stability of PMMA is moderate, superior to PVC and POM, but inferior to polyolefin and polystyrene. The thermal decomposition temperature is slightly higher than 270 ℃, and the flow temperature is about 160 ℃, so there is a wide range of melting processing temperature.
Keywords in the article: plexiglass

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