PC: Polycarbonate is a high molecular weight polymer containing
carbonate groups in the molecular chain. It is a tough thermoplastic resin
whose name comes from the CO3 group inside. Can be synthesized by bisphenol A
and carbon oxychloride (COCl2). The chemical formula is
2,2'-bis(4-hydroxyphenyl)propane polycarbonate.
PMMA: Polymethyl methacrylate, which is plexiglass, acrylic. Chemical
formula: -[CH2C(CH3)(COOCH3)]n-.
Both are transparent plastics. In the case of the same thickness
and the same raw material particles, the light transmittance of PMMA is 2-3%
higher than that of PC, which is close to 90%, which is not easy to distinguish
with the naked eye. But the other physical differences between the two are
quite big, because after all, they are two kinds of materials.
1. Heat resistance, temperature resistance, weather resistance
PMMA is easy to soften when it reaches 70 degrees, while PC is
120 degrees, so PC is more heat-resistant and heat-resistant, and the working
temperature is more widely used.
2. Impact resistance, smash resistance, strength index
With the same thickness, the impact strength of PC is 30-50
times that of PMMA. Starting from 6mm, PC thick boards are bulletproof
materials, and ordinary adults with 3mm PC boards can't break it with a hammer.
3. Flame-resistant, fire-resistant
PC is a flame-retardant material, which belongs to Class B
flame-retardant (UL94-V2 internationally), one of the self-extinguishing
plastics, which is not easy to burn, while PMMA is not flame-retardant.
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