ASTM_D_4571_-_06_2012.pdf

Designation:D457106(Reapproved 2012)Standard Test Methods forRubber Compounding MaterialsDetermination of VolatileMaterial1This standard is issued under the fixed designation D4571;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 These test methods cover the determination of the lossof volatile materials in various rubber chemicals based on themass loss upon heating at 70C.1.2 These test methods for the determination of volatilematter include the following materials:SectionSulfur7-14p-Phenylenediamine antidegradants15-231.3 The values stated in SI units are to regarded as thestandard.The values given in parentheses are for informationonly.1.4 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D4483 Practice for Evaluating Precision for Test MethodStandards in the Rubber and Carbon Black ManufacturingIndustriesD4676 Classification for Rubber Compounding MaterialsAntidegradants3.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1“lot”samplea production sample representative of astandard production unit,normally referred to as“the sample.”3.1.2 test unitthe actual material used in the analysis.Itmust be representative of the“lot”sample.4.Summary of Test Methods4.1 The rubber chemicals are weighed before and afterheating at 70C.4.2 Sample preparation,procedures,calculations,and pre-cision statements will be found in each section dealing with aparticular rubber chemical.5.Significance and Use5.1 These test methods are suitable for the determination ofvolatile material in rubber compounding materials.The testmethods may be used for quality control,product acceptance,or research and development.Classification D4676 prescribespercent volatile material as an important characteristic ofrubber antidegradants.6.Apparatus6.1 Weighing Bottle,low form,82 cm3capacity.6.2 Explosion-proof,Vented Air Circulating Oven,capableof temperature regulation of 70 6 2C.6.3 Analytical Balance,sensitive to 0.1 mg.6.4 Desiccator.SULFUR7.Scope7.1 This test method covers the measurement of the loss ofvolatiles from sulfur at 70C.The volatile components consistof moisture,low boiling organic components,and sulfur.8.Summary of Test Method8.1 The sulfur specimen is weighed before and after heatingfor 2 h at 70C.The measured loss of mass is the volatilematerial content.9.Significance and Use9.1 This test method determines the volatile material insulfur at 70C.By ascertaining that the volatiles are lower thana predicted maximum limit,it may safely be concluded thatmoisture(water)is below that limit and is not present inexcessive amounts.1These test methods are under the jurisdiction of ASTM Committee D11 onRubber and is the direct responsibility of Subcommittee D11.11 on ChemicalAnalysis.Current edition approved May 1,2012.Published June 2012.Originallyapproved in 1986.Last previous edition approved in 2006 as D4571 06.DOI:10.1520/D4571-06R12.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 9.2 Testing at temperatures higher than 70C results ingreater volatilization of sulfur.10.Apparatus10.1 See Section 6.11.Procedure11.1 Weigh the weighing bottle to the nearest 0.1 g(A).Then add approximately 5 g sulfur and weigh again(B).Makesure the sulfur covers the base of the bottle evenly.11.2 Place the uncovered bottle in the 70C oven for 2 h.Remove the specimen,cover,and cool in a desiccator for 1 h(C).Weigh the cooled specimen to the nearest 0.1 mg.12.Calculation12.1 The volatile material is given by the following equa-tion:V 5B 2 C!/B 2 A!#3100(1)where:V=volatiles,%,A=original specimen mass in grams,andB=heated specimen mass in grams.13.Report13.1 Report results obtained from two individual determi-nations and their average to the nearest 0.01%.14.Precision and Bias314.1 This precision and bias section has been prepared inaccordance with Practice D4483.Refer to Practice D4483 forterminology and other statistical details.14.2 The precision results in this precision and bias sectiongive an estimate of the precision of this test method with thematerials(rubbers)used in the particular interlaboratory pro-grams as described below.The precision parameters should notbe used for acceptance/rejection testing of any group ofmaterials withou