The ASTM D5775-95 standard specifies a method for the determination of bound styrene content in styrene-butadiene rubber (SBR) by refractive index. This method is suitable for solid unfilled styrene-butadiene rubber produced by emulsion polymerization process, with bound styrene content not exceeding 55%. The testing principle is based on the relationship between refractive index and styrene content. The styrene content is determined by measuring the refractive index of the sample and comparing it with a standard curve or table. This standard can be used for quality control, checking the accuracy of monomer addition, and guiding the uniformity of the product, as the bound styrene content directly affects the physical properties of the rubber.
| Status | Active |
|---|---|
| CCS | ICS | 83.060 |
| Release Date | 2023-09-01 00:00:00 | Implementation Date |