ASTM D 5775 - 95 (Reapproved 2014) Standard Test Method for Rubber - Determination of Bound Styrene in Styrene Butadiene Rubber by Refractive Index

Current edition approved Aug. 1, 2014. Published November 2014. Originally approved in 1995. Last previous edition approved in 2009 as D5775 – 95 (2009)ε1. — 4 p.
This test method covers the determination of styrene content, and is intended for general use on solid uncompounded styrene-butadiene copolymers, commonly referred to as SBR, prepared by the emulsion process. SBR polymers prepared in solution will require the use of different refractive index tables because the vinyl content of the butadiene differs from that in the emulsion polymers. It is applicable to polymers having less than 55 % bound styrene.
The nomenclature used in this test method is in accordance with Practice D1418.