Why does the acrylic mirror deplating when heated and bent?
为什么亚克力镜受热弯曲后会脱镀？
Acrylic (polymethyl methacrylate, PMMA) is a thermoplast polymer that can be heated to form into any shape desired. However, too much heat can cause it to become soft and pliable, which can make it deformed and brittle, leading to cracking or other damage. Additionally, when acrylic is bent under severe stress, it can cause it to become white and opaque, which can be a symptom of what is known as crazing.
丙烯酸（聚甲基丙烯酸甲酯，PMMA）是一种热塑性聚合物，可以加热形成任何所需的形状。 然而，过多的热量会导致其变得柔软和柔韧，从而使其变形和脆化，从而导致破裂或其他损坏。 此外，当丙烯酸树脂在严重压力下弯曲时，会导致其变白且不透明，这可能是所谓的龟裂的症状。
Crazing is a result of excessive stress on the acrylic, which can cause micro-cracks on the surface, making the material non-transparent. Crazing is a common issue with acrylic that can be caused by a variety of factors such as heat, stress, and chemical exposure. So, when heating acrylic and bending, it’s crucial to keep the material within its recommended temperature range and avoid applying too much stress, which can lead to crazing and other forms of damage.
龟裂是亚克力承受过大应力的结果，会导致表面出现微裂纹，使材料不透明。 龟裂是亚克力的一个常见问题，可能由多种因素引起，例如热、压力和化学品暴露。 因此，在加热亚克力和弯曲时，将材料保持在建议的温度范围内并避免施加太大的应力至关重要，否则可能导致开裂和其他形式的损坏。