Weather resistance
Polymethyl methacrylate has excellent resistance to atmospheric aging. After 4 years of natural aging test, the weight change, tensile strength and light transmittance of the sample are slightly reduced, the color is slightly yellowed, and the resistance to silver streak is reduced. Obviously, the impact strength is still slightly improved, and other physical properties are almost unchanged.
Flammability
Polymethyl methacrylate is easy to burn, with a limiting oxygen index of only 17.3.