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Materials Science Popularization 丨 Five major engineering plastics

1. Pipeline system in the construction field: UPVC rigid polyvinyl chloride drainage pipes, PPR random copolymer polypropylene water supply pipes, and PE polyethylene gas pipes are mainstream plastic pipelines for municipal and home decoration. Thermal insulation and waterproofing: EPS polystyrene foam board and XPS extruded polystyrene board are used for exterior wall insulation, polyurethane rigid foam insulation layer is used for cold storage and roof insulation, and PVC waterproofing membrane is used for waterproofing of underground projects.

2. Outstanding comprehensive performance: It has the characteristics of transparency, durability, non-breakable, and heat resistance. It is one of the five major engineering plastics.

3. Packaging materials: PET bottles are the mainstream choice for beverage packaging because of their high transparency, good airtightness and recyclability. Engineering plastics: After being modified to improve heat resistance and impact strength, they are used in high-demand scenarios such as automobile parts and electrical casings. Technological breakthroughs and status modification progress: After the 1980s, the development of nucleating agents and crystallization promoters significantly increased the crystallization rate and mechanical properties of PET, promoting its transformation from fiber materials to engineering plastics.

4. In addition, PPO can also be used as a mainstream material for photovoltaic junction boxes, and is popular for its high load deformation temperature, low embrittlement temperature and excellent electrical safety protection performance. In general, PPO, as an engineering plastic with excellent properties, has broad application prospects in many fields. With the continuous advancement of technology and the improvement of people's requirements for material properties, PPO and its modified materials will play a more important role in the future.

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