Among them, aliphatic and aliphatic-aromatic polycarbonates have low mechanical properties, which limits their application in engineering plastics. Only aromatic polycarbonate has been industrialized. Due to its special structure, polycarbonate has become the fastest-growing general engineering plastic among the five engineering plastics.
PC is an almost colorless glassy amorphous polymer with good optical properties. PC high molecular weight resin has high toughness, the notched impact strength of cantilever beam is 600~900J/m, and the thermal deformation temperature of unfilled brand is about130 C, which can be increased by glass fiber reinforcement.
The bending modulus of PC can reach more than 2400MPa, and the resin can be processed into large rigid products. When it is lower than100 C, the creep rate under load is very low. PC has poor hydrolysis resistance and cannot be used for products repeatedly subjected to high-pressure steam.
The main performance defects of PC are that its hydrolysis stability is not high enough, it is sensitive to nicks, and its resistance to organic chemicals and scratches is poor, and it will turn yellow after long-term exposure to ultraviolet rays. Like other resins, PC is easily corroded by some organic solvents.
Develop an application:
The three major application fields of PC engineering plastics are glass assembly industry, automobile industry and electronic appliance industry, followed by industrial machinery parts, compact discs, packaging, computers and other office equipment, medical care, films, leisure and protective articles.
PC can be used as door and window glass, and PC laminates are widely used as protective windows in banks, embassies, detention centers and public places, as well as aircraft cabin covers, lighting equipment, industrial safety baffles and bulletproof glass.
The PC board can be used as various signs, such as gasoline pump dial, automobile dashboard, warehouse and outdoor commercial signs, point slip indicator, PC resin for automobile lighting system, dashboard system and interior decoration system, front lampshade, reinforced automobile front and rear fenders, mirror frame, door frame cover, joystick sheath, spoiler and PC for junction box, socket, plug, sleeve and washer.
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