ASTM_D_817_-_12_2019.pdf

Designation:D81712(Reapproved 2019)Standard Test Methods of TestingCellulose Acetate Propionate and Cellulose AcetateButyrate1This standard is issued under the fixed designation D817;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 procedures for the testing ofcellulose acetate propionates and acetate butyrates.Theseesters may vary widely in composition and properties,socertain of the procedures can be used only in the ranges ofcomposition where they are suitable.1.2 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.1.3 The test procedures appear in the following sections:SectionsAcetyl Propionyl or Butyryl Contents28 37Acetyl Content,Apparent18 27Acidity,Free12 17Ash7 10Color and Haze77 81Heat Stability57 65Hydroxyl Content38 44Hydroxyl Content,Primary46 50Intrinsic Viscosity67 71Moisture Content5-6Sulfur or Sulfate Content51 56Viscosity74-75Limiting Viscosity Number67 711.4 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,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.5 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D618 Practice for Conditioning Plastics for TestingD1343 Test Method for Viscosity of Cellulose Derivativesby Ball-Drop MethodD2929 Test Method for Sulfur Content of Cellulosic Mate-rials by X-Ray FluorescenceD5897 Test Method for Determination of Percent Hydroxylon Cellulose Esters by Potentiometric TitrationAlternative Method3.Reagents3.1 Purity of ReagentsReagent grade chemicals shall beused in all tests.Unless otherwise indicated,it is intended thatall reagents shall conform to the specifications of the Commit-tee on Analytical Reagents of the American Chemical Society,where such specifications are available.3Other grades may beused,provided it is first ascertained that the reagent is ofsufficiently high purity to permit its use without lessening theaccuracy of the determination.4.Conditioning4.1 ConditioningCondition the test specimens at 23 62C(73.4 6 3.6F)and 50 6 5%relative humidity for not lessthan 40 h prior to test in accordance with Procedure A ofPractice D618,for those tests where conditioning is required.In cases of disagreement,the tolerances shall be 61C(61.8F)and 62%relative humidity.4.2 Test ConditionsConduct tests in the Standard Labora-tory Atmosphere of 23 6 2C(73.4 6 3.6F)and 50 6 5%1These test methods are under the jurisdiction of ASTM Committee D01 onPaint and Related Coatings,Materials,and Applications and are the directresponsibility of Subcommittee D01.36 on Cellulose and Cellulose Derivatives.Current edition approved Dec.1,2019.Published December 2019.Originallyapproved in 1944.Last previous edition approved in 2012 as D817 12.DOI:10.1520/D0817-12R19.2For 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.3ACS Reagent Chemicals,Specifications and Procedures for Reagents andStandard-Grade Reference Materials,American Chemical Society,Washington,DC.For suggestions on the testing of reagents not listed by the American ChemicalSociety,see Analar Standards for Laboratory Chemicals,BDH Ltd.,Poole,Dorset,U.K.,and the United States Pharmacopeia and National Formulary,U.S.Pharma-copeial Convention,Inc.(USPC),Rockville,MD.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 relative humidity,unless otherwise specified in the test meth-ods.In cases of disagreements,the tolerances shall be 61C(61.8F)and 62%relative humidity.MOISTURE CONTENT5.Procedure5.1 Transfer about 5 g of the sample to a tared,low,wide-form weighing bottle and weigh to the nearest 0.001 g.Dry in an oven for 2 h at 105 6 3C.Remove the bottle fromthe oven,cover,cool in a desiccator,and weigh.6.Calculation6.1 Calculate the percen