GF reinforced-General grades
Polycarbonate (PC) is a thermoplastic resin known for its excellent mechanical properties, heat resistance, and transparency. It is widely used in optical, electronic, automotive, and construction applications.
Mechanical Properties and Thermal Performance
- Impact Resistance: Polycarbonate has outstanding impact resistance, with impact strength typically ranging from 60 to 70 kJ/m². It maintains good toughness even at low temperatures, making it suitable for applications requiring high impact resistance.
- Heat Resistance: The glass transition temperature (Tg) of polycarbonate is approximately 150°C, with a melting point between 220°C and 230°C. It retains its shape in high-temperature environments, making it suitable for high-temperature applications.
- Low-Temperature Performance: Polycarbonate retains good toughness at low temperatures and can generally be used in environments as cold as -100°C without becoming brittle.
- Chemical Resistance: Polycarbonate exhibits good resistance to most acids, bases, and oils, but may be susceptible to certain solvents such as benzene and chloroform. Caution is advised when exposed to these chemicals.
Thermal Properties and Dimensional Stability
- Moisture Absorption: The moisture absorption rate of polycarbonate is typically between 0.2% and 0.4%. Moisture absorption has a minimal impact on dimensional stability, but extreme humidity can cause the material to swell or deform.
- Processability: Polycarbonate has good processability, with a melt flow rate (MFR) generally ranging from 10 to 30 g/10 min. It is suitable for various processing methods, such as injection molding and extrusion. Processing parameters can be adjusted to optimize material performance.
- Thermal Deformation Resistance: The heat deflection temperature of polycarbonate is typically between 130°C and 140°C. It maintains good dimensional stability in high-temperature environments, but long-term exposure to high temperatures may affect its performance.
Material Structure and Performance
- Crystalline Structure: Polycarbonate is an amorphous material, which provides excellent optical transparency. Its amorphous structure contributes to its transparency and processability, though it may exhibit lower rigidity.
- Modification Treatments: Polycarbonate can be enhanced with additives or modifiers to improve its mechanical properties and heat resistance. UV stabilizers are often added for optical applications to enhance weather resistance.
Applications
- Wide Applications: Polycarbonate is widely used in optical lenses, displays, automotive parts, and building materials. Its excellent transparency and impact resistance make it outstanding in applications requiring visual clarity and durability.
- Optical Lenses: Due to its superior transparency and impact resistance, polycarbonate is commonly used for manufacturing eyeglass lenses and optical lenses.
- Automotive Parts: In the automotive sector, polycarbonate is used for manufacturing headlamp covers, instrument panels, and interior trim components due to its heat resistance and excellent impact performance.