BS 7164-7.1:1990 PDF

What is BS 7164-7.1 - M ethods of determination of polymer content about?

BS 7164 is a series on chemical tests for raw and vulcanized rubber. Raw and vulcanized rubber is any type of rubber that's been hardened through the use of heat and sulfur. BS 7164-7.1 specifies a method for the determination of polyisoprene occurring as natural isoprene rubber (NR)2), synthetic isoprene rubber (IR), balata and gutta-percha, in the total solids from NR or IR latices, in solid raw rubbers, or in cured or uncured compounds. The method is applicable to these isoprene rubbers alone or in blends. It cannot be used for hard rubber (ebonite) without modification. The method is applicable to blends of the rubbers mentioned in BS 7164-7.1 with SBR, BR and NBR. If halogenated rubbers are present, a slightly modified procedure, described in BS 7164-7.1 , is used. Some interference may be expected because these rubbers react with chromic acid in a manner similar to polyisoprene. If these interfering rubbers are a major part of the blend, they may impede the reaction of the polyisoprene with the chromic acid. The digestion is checked for completeness on known mixtures of these interfering rubbers. Milling the test portion as finely as possible is advisable.

Who is BS 7164-7.1 - Methods of determination of polymer content for?

BS 7164-7.1