1. Plexiglass is made from polymethyl methacrylate (PMMA), a type of acrylic polymer. This material contains a polar side methyl group, which makes it highly hygroscopic. As a result, it's important to keep acrylic sheets dry before processing. To ensure proper drying, the material should be heated at a temperature between 78°C and 80°C for approximately 5 to 6 hours.
2. Plexiglass is an amorphous polymer, meaning it doesn't have a crystalline structure. Its shrinkage rate is relatively low, typically ranging between 0.45% and 0.9%. This characteristic makes it ideal for precision molding in the manufacturing of acrylic products, ensuring high accuracy and consistency in the final shape.
3. Polymethyl methacrylate has a normal flow behavior at room temperature but exhibits non-Newtonian fluid characteristics when heated. This means its viscosity changes with shear stress. At higher temperatures, the solubility of plexiglass decreases, making it highly sensitive to thermal conditions during processing.
4. During the melting and flowing process, plexiglass typically operates around 150°C. However, it starts to decompose at temperatures above 270°C. Despite this, plexiglass remains flexible across a wide range of temperatures, showing excellent heat resistance. This makes it suitable for various applications where temperature fluctuations are common.
5. Plexiglass also offers excellent cutting performance. It can be efficiently processed using laser cutting, allowing for precise and clean edges that are difficult to achieve with glass. This property not only improves production efficiency but also ensures high-quality results. Additionally, acrylic is resistant to both high and low temperatures, giving manufacturers peace of mind during the production process.
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