IS 11720 : Part 4 : 1993 Methods of test for synthetic rubber Part 4 : Determination of volatile matter

1 Scope

1.1 This standard (Part 4) prescribes two methods, a hot millmethod and an oven method, for the determination of moisture andother volatile matter content in raw synthetic rubber.

1.2 These methods are suitable for the determination of thevolatile matter content in rubbers having an unsaturated carbonchain, that is, rubbers derived at least partly from diolefins forexample, acrylate butadiene rubber (ABR); Butadiene rubber (BR),chloroprene rubber, isobutene isoprene rubber (butyl rubber II),isoprene rubber, synthetic (IR), acrylonitrile butadiene rubber(nitrile rubber), styrene butadiene rubber (SBR) etc. They may alsobe used for other rubbers, but in these cases it is necessary toprove that the change in mass is solely due to loss of originalvolatile matter and not due to rubber degradation.

1.3 The hot mill method is not applicable to synthetic isoprenerubbers or to rubbers too difficult to handle on a hot-mill or torubbers in powdered or chip form.

1.4 The two test methods do not necessarily give identicalresults. Therefore, in case of dispute the oven method is thereference method.

2 References

IS 3660 : Part 51 : 1972 Methods of test for naturalrubber :Determination of ash, total copper, manganese,rubber hydrocarbon, viscosity (shearing diskviscometer), and mixing and vulcanizing ofrubber in standard compound

IS 5599 :1970Rubber, raw natural and synthetic - Methods ofsampling and sample preparation