The PMMA chemical name is polymethyl methacrylate.
Important optical plastics, good comprehensive performance and optical properties, transparency comparable to optical glass, almost full light absorption of visible light, light transmittance >91%, good gloss, light and strong, good moldability It has good chemical and weather resistance. The disadvantage is that the surface hardness is low and easy to scratch, and the water absorption is easy to expand. It can be used as an optical lens and an industrial lens.

PC polycarbonate
Impact toughness (first in thermoplastics), high heat resistance, good cold resistance, bending resistance, tensile strength comparable to nylon, high elongation and modulus of elasticity, good dimensional stability, resistance Grindability is comparable to nylon, corrosion resistant, high transparency, but prone to cracking. Commonly used in the production of gears, bearings, colorless and transparent PC can be used to manufacture aircraft, windshield