GPPS 1240 is a high molecular weight crystal polystyrene designed for a range of applications including extrusion, impact dilution, and injection molding. This grade is known for its good mechanical properties, making it suitable for specialized extrusion processes and products requiring precise dimensional stability and impact resistance.
 
Key Features
High Molecular Weight: Enhances the mechanical strength and durability of finished products.
Versatile Application Range: Suitable for special extrusion, impact dilution, and special injection molding applications.
Good Mechanical Properties: Provides robust performance in structural applications.
 
Applications
Special Extrusion: Ideal for producing complex extrusion profiles used in various industrial applications.
Impact Dilution: Effective in applications requiring diluted impact properties for enhanced performance.
Special Injection Molding: Suitable for precision molding applications demanding high detail and strength.
 
Processing Guidelines
Drying: If moisture affects product quality, granules of GPPS 1240 can be dried at 70°C for 2-4 hours to ensure optimal processing conditions.
 
Typical Properties
Melt Flow Index (200°C/5kg): 2.5 g/10 min (ASTM D-1238), indicating the material’s flow characteristics during processing.
Styrene Residual Monomer: Less than 500 ppm (CLG LABPSG004), ensuring low residual content for safety.
Vicat Softening Point: 96°C (ASTM D-1525), the temperature at which the polymer begins to soften.
Tensile Stress at Break: 53 MPa (ASTM D-638), showing the material's maximum stress capacity before breaking.
Elongation at Break: 3% (ASTM D-638), indicating minimal elongation, highlighting its rigidity.
Tensile Modulus: 4300 MPa (ASTM D-638), reflecting the high stiffness of the material.
Density and Shrinkage: Approximately 1.04 kg/lit and 0.4-0.7% (ASTM D-955), important for processing and dimensional considerations.
 
Conclusion
GPPS 1240 is engineered for industries requiring a polystyrene with high mechanical properties and versatility in processing applications such as special extrusion, impact dilution, and precise injection molding. Its robust performance makes it a valuable choice for manufacturers looking for reliability and precision in their polystyrene materials.