PC is transparent, PP is translucent; The surface of pc is easy to scratch, and the scratch resistance of pp; Pc is resistant to high temperature, while pp is generally resistant to high temperature.
2.PC has excellent electrical insulation, ductility, dimensional stability and chemical resistance, high strength, heat resistance and cold resistance; It also has the advantages of self-extinguishing, flame retardant, non-toxic and colorable, but with the increase of temperature, more bisphenol A will be released from PC, so PC will pose a threat to health, and it will release bisphenol A at high temperature.
3.pp is non-toxic, odorless, low in density, strong in heat resistance, up to 100℃, high in toughness, resistant to falling and impact, good in dielectric property, high in frequency insulation and unaffected by environmental humidity, but it has the disadvantages of brittleness, wear resistance and easy aging at low temperature, and can be used to make edible tableware.
Extended data:
Polycarbonate (PC) is a kind of polymer with carbonate groups in its molecular chain, which can be divided into aliphatic, aromatic, aliphatic-aromatic and other types according to the structure of ester groups. It has high strength and elastic coefficient, high impact strength and wide temperature range; High transparency, no dyeing; Low molding shrinkage and good dimensional stability.
Polypropylene (PP) is a thermoplastic resin polymerized from propylene. Non-toxic, tasteless, low density, strength, stiffness, hardness and heat resistance are superior to those of low-pressure polyethylene, and it can be used at about 100℃.
Good dielectric properties, high-frequency insulation, not affected by humidity, but brittle at low temperature, not wear-resistant, easy to age. Suitable for manufacturing general mechanical parts, corrosion-resistant parts and insulating parts. Common organic solvents such as acid and alkali have little effect on it and can be used for tableware.
References:
Polycarbonate pc Baidu Encyclopedia
Polypropylene pp Baidu encyclopedia