SM
Styrene Monomer (SM), is an organic compound with the chemical formula C8H8. Appearance as a colorless oily liquid. Mainly used in the manufacture of polystyrene (PS), acrylonitrile-butadiene-styrene resin (ABS), foamed grade polystyrene (EPS) as the main raw material. It can also be used as an additive for the manufacture of styrene-butadiene rubber (SBR), unsaturated resin (UP), and plastic modifier (MBS).
Quality specification
| Item | Unit | Quality standard Limits | Test Methods |
| Purity | wt.% | ≧99.7 | ASTM-D5135 |
| Proportion 25/25℃ (Specific Gravity) | 0.9038 ~ 0.9057 | ASTM-D891 | |
| Color | APHA | ≦10 | ASTM-D1209 |
| Polymer | wt.ppm | ≦10 | ASTM-D2121 |
| Aldehydes | wt.ppm | ≦200 | ASTM-D2119 |
| Peroxides | wt.ppm | ≦15 | ASTM-D2340 |
| Inhibitor | wt.ppm | 10 ~ 15 | ASTM-D2120 |
| Sulfur | wt.ppm | ≦20 | ASTM-D3961 |
| Chlorides | wt.ppm | ≦15 | DIN-51409 |
| 25℃(Viscosity) | CPS | ≦0.75 | Viscosity Meter |
| Water | ppm | ≦180 | ASTM-D6364 |
| Appearance | Clear | Visual |
