SABIC® PS 155
General Purpose Polystyrene for Foam Extrusion
Description
General purpose Polystyrene PS 155 is manufactured by continuous mass polymerization of styrene monomer. It is a crystal-like, hard and brittle polymer with medium flow and good tensile and flexural strength. It has high vicat and heat deflection temperatures.
Applications
It is recommended for extrusion purposes. It can be used for foam extrusion applications such as building insulation.
Typical Property Values
| Properties | Typical Values | Units | Test Methods |
|---|---|---|---|
| Polymer Properties | |||
| Melt Flow Rate (MFR) @ 200°C & 5 kg | 7 | g/10 min | ASTM D1238 |
| Load Density @ 23°C | 1050 | kg/m³ | ASTM D792 |
| Bulk Density (Method B) | 600 | kg/m³ | ASTM D1895 |
| Mechanical Properties | |||
| Tensile Strength | 45 | MPa | ASTM D638 |
| Tensile Elongation | 2 | % | ASTM D638 |
| Tensile Modulus | 2990 | MPa | ASTM D638 |
| Flexural Strength | 66 | MPa | ASTM D790 |
| Flexural Modulus | 3627 | MPa | ASTM D790 |
| Izod Impact Notched @ 23°C | 16 | J/m | ASTM D256A |
| Rockwell Hardness, L-Scale | 93 | — | ASTM D785 |
| Rockwell Hardness, M-Scale | 60 | — | ASTM D785 |
| Thermal Properties | |||
| Vicat Softening Point (Rate A/50°C) | 102 | °C | ASTM D1525 |
| Heat Deflection Temperature (Method B, 455 kPa, Annealed) | 100 | °C | ASTM D648 |
| Flammability Rating, UL 94 @ 1.3mm and 3mm (natural color) | MB | Rate | — |
(1) Typical values; not to be construed as specification limits. (2) Based on injection molded specimens.
Processing Conditions
Typical temperature (°C) profile for PS 155:
Throat: Ambient | Feed: 185°C | Transition: 200°C | Metering: 220°C | Die: 230°C
Food Regulation
PS 155 is suitable for food contact application. Detailed information is provided in relevant Material Safety Datasheet. For additional specific information please contact SABIC local representative for certificate.
Storage And Handling
Polystyrene resin should be stored to prevent direct exposure to sunlight and/or heat. The storage area should also be dry and preferably not exceed 50°C. SABIC would not give warranty to bad storage conditions which may lead to quality deterioration such as color change, bad smell and inadequate product performance. It is advisable to process PS resin within 6 months after delivery.
