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Suzhou Anmei Material Technology Co., Ltd.

What Are Engineering Plastics?

Engineering plastics refers to a class of high-performance polymer materials that can be used as structural materials, withstand mechanical stress in a wide temperature range, and used in harsh chemical and physical environments.

Ⅰ. Performance characteristics of engineering plastics

1. Can withstand certain external forces;

2. Have good mechanical properties and dimensional stability;

3. It can maintain its excellent performance under high and low temperatures and can be used as engineering structural parts.

Ⅱ. The main properties of engineering plastics

1. Thermal properties

Glass transition temperature (Tg) and melting point (Tm); high heat distortion temperature (HDT); high long-term use temperature (UL-746B); wide use temperature range; low thermal expansion coefficient.

2. Mechanical properties

High strength, high mechanical modulus, low creep, strong wear resistance and fatigue resistance.

3. Other

Good chemical resistance, electrical resistance, flame resistance, weather resistance, and dimensional stability.

Ⅲ. Common types of engineering plastics

Nylon, polyoxymethylene, polycarbonate, polysulfone, etc.

Ⅳ. The development history of five general engineering plastics

1. Polyamide (PA)

Carozesi (W.H.Carothers American chemist) developed polyamide research and applied for a patent in 1931. DuPont organized production in 1939 and took the lead in industrialization.

2. Homopolyoxymethylene (POM)

DuPont successfully developed it in 1956 and realized industrial production in 1959.

Copolyformaldehyde: It was developed and commercialized by Celanese Corporation of the United States in 1962.

3. Polycarbonate (PC)

In 1958 and 1960, Bayer of Germany and General Electric of the United States developed and produced polycarbonate by the transesterification method and the phosgenation method respectively.

4. Polyphenylene ether (PPO)

Developed by General Electric in 1964, and introduced modified polyphenylene ether two years later.

5. Polybutylene terephthalate (PBT)

In 1970, Celanese Corporation of the United States developed thermoplastic polyester into engineering plastics. It became the last successfully developed category of five general engineering plastics with extremely high output growth rates.

Ⅴ. The status of engineering plastics

Since the emergence of engineering plastics in the 1950s, after half a century of development, they have grown stronger in market competition. In 2000, the world's engineering plastics output exceeded 5 million tons, and it was still at an annual rate of 7%-9%. Increment. Although it only accounts for 2% to 3% of all plastics, its excellent performance is unmatched by other materials.

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