What are the differences between PC and PP materials?

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Problem Description: What are the differences between PC and PP materials? Please provide a detailed explanation of which is better.

The answer provided by netizens is: However, it has stronger impact resistance. The strength of PP increases with the increase in ethylene content. The Vicat softening temperature of PP is 150°C. Due to its high crystallinity, this material has good surface rigidity and scratch resistance.

PP does not have the problem of environmental stress cracking. Adding 30% glass additive can reduce the shrinkage rate to 0.7%, low transparency, and low gloss. For materials with the same MFR, the strength of the copolymer type is higher than that of the homopolymer type. Due to crystallization, the shrinkage rate of PP is quite high, generally 1-2%. And the uniformity of shrinkage direction is much better than that of PE-HD, etc., which makes its appearance easier to scratch, but its strength and toughness are very good. Whether it is heavy pressure or general bumps, as long as you are not trying to hit it with a stone, it is durable enough. PP is polypropylene resin. Because the homopolymer type PP is very brittle when the temperature is above 0°C, many commercial PP materials are random copolymers with 1-4% ethylene or higher ethylene content clamp-type copolymers. Copolymer PP materials have a lower heat distortion temperature (100°C). Usually, it is modified by adding glass fiber, metal additives, or thermoplastic rubber. PP's flow rate MFR ranges from 1 to 40.8. It has advantages such as flame retardancy, colorability, etc., and you can see PC plastic everywhere in your life. Homopolymer and copolymer PP materials both have excellent moisture resistance. PC is a non-crystalline thermoplastic resin with excellent comprehensive properties, excellent electrical insulation, ductility, dimensional stability, and chemical corrosion resistance, high strength; it also has self-extinguishing, heat resistance, and cold resistance. Low MFR PP materials have better impact resistance but lower tensile strength. Large-scale industrial production and easy processing characteristics also make its price extremely low. Its strength can meet various needs from mobile phones to bulletproof glass, but its hardness is insufficient compared to metal, and it has low rigidity. From the appearance, PC is transparent, and PP is translucent. PC is short for polycarbonate.