Polycarbonate is a colorless and transparent engineering plastic with high impact strength, wide temperature range, good creep resistance, electrical insulation and dimensional stability. disadvantage is that it is sensitive to gap. environmental stress cracking resistance is poor, and it is difficult to form a product with a metal insert. English name referred to as pc gf pellet. pc gf pellet is an amorphous, odorless, non-toxic, highly transparent colorless or slightly yellow rmoplastic engineering plastic with excellent physical and mechanical properties, especially excellent impact resistance, high tensile strength, flexural strength and compressive strength; Low creep, dimensional stability; good heat resistance and low temperature resistance, stable mechanical properties, dimensional stability, electrical properties and flame retardancy over a wide temperature range, -60~120°C Long-term use; no obvious melting point, molten state at 220-230 ° C; due to large molecular chain rigidity, resin melt viscosity; small water absorption, small shrinkage, high dimensional accuracy, good dimensional stability, low gas permeability Self-extinguishing material; stable to light, but not resistant to ultraviolet light, good wear resistance; oil resistant, acid resistant, strong alkali resistant, oxidizing acid and amine, ketone, soluble in chlorinated hydrocarbons and aromatic solvents, It is easy to cause hydrolysis and cracking in water for a long time. disadvantage is that it is easy to produce stress cracking due to poor fatigue resistance, poor solvent resistance and poor wear resistance. Physicochemical properties pc gf pellet plastic process characteristics are as follows: 1 is an amorphous plastic, Tg is 149 ~ 150 ° C; Tf is 215 ~ 225 ° C; molding temperature is 250 ~ 310 ° C; relative average molecular mass is 20,000 to 40,000. 2 rmal stability is better and increases as relative molecular mass increases. 3 rheological properties are close to Newtonian liquid, apparent viscosity is greatly affected by temperature, shear rate is less affected, and relative average molecular mass increases. No obvious melting point, high melt viscosity. re is a benzene ring in pc gf pellet molecular chain, so molecular chain has a large rigidity.
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