GPPS General Purpose Polystyrene
Appearance: Clear pellets
Solubility in water: Insoluble
Density: 1.04-1.111 g/cm3 (20 C)
Usage: Common commercial polymer.
Introduction of GPPS:
General Purpose Polystyrene is a kind of thermoplastic resin, is a colorless, odorless, tasteless, shiny, transparent beaded or granular solid. Density is 1.04 to 1.09, transparency is 88% to 92%, refractive index is 1.59 to 1.60. In the stress function, resulting in birefringence, the so-called stress - optical effect. Product of the melting temperature is 150 to 180 C, thermal decomposition temperature is 300 C, the heat distortion temperature is 70 to 100 C, long-term use temperature is 60 ~ 80 C
| Testing standards | Test Conditions | Units | PG-22 | PG-33 | PG-80 | PG-80N | PG-383 | PG-383M |
Melt flow index | D-1238 | 200°C*5kg | g/10min. | 17.5 | 7.4 | 4.0 | 5.7 | 3.0 | 3.0 |
Softening point | D-1525 | 1kg. | °C | 87.0 | 94.0 | 97.7 | 97.6 | 105.0 | 96.3 |
Tensile strength | D-638 |
| Kg/cm² | 420 | 470 | 500 | 490 | 560 | 520 |
Tensile modulus | D-638 | - |
| 26460 | 26220 | 26720 | 26720 | 28140 | - |
Bending strength | D-790 | - | Kg/cm² | 540 | 670 | 690 | 690 | 820 | - |
Flexural modulus | D-790 |
| Kg/cm² | 31000 | 31000 | 31000 | 31000 | 33000 | - |
Heat distortion temperature | D-648 | - | C | 75 | 79 | 81 | 81 | 86 | - |
Use | - | - | - |
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