1、Designation:D236401(Reapproved 2007)1Standard Test Methods forHydroxyethylcellulose1This standard is issued under the fixed designation D2364;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 paren
2、theses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1NOTESpecification E 1 was replaced with Specification E 2251 in Section 2 and 20.5 in June 2007.1.Scope1.1 These test methods cover the testing of hydroxyethyl-cell
3、ulose.1.2 The test procedures appear in the following order:SectionsMoisture4-9Ash10-17Viscosity18-24Density25-311.3 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 safet
4、y and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D1193 Specification for Reagent WaterD4794 Test Method for Determination of Ethoxyl or Hy-droxyethoxyl Substitution in Cellulose Ether Products byGas Chromatograph
5、yE2251 Specification for Liquid-in-Glass ASTM Thermom-eters with Low-Hazard Precision Liquids3.Purity of Reagents3.1 Reagent grade chemicals shall be used in all tests.Unless otherwise indicated,it is intended that all reagents shallconform to the specifications of the Committee on AnalyticalReagent
6、s of the American Chemical Society,3where suchspecifications are available.Other grades may be used,pro-vided it is first ascertained that the reagent is of sufficientlyhigh purity to permit its use without lessening the accuracy ofthe determination.3.2 Unless otherwise indicated,reference to water
7、shall beunderstood to mean reagent water,conforming to SpecificationD1193.MOISTURE4.Scope4.1 This test method covers the determination of the volatilecontent of hydroxyethylcellulose.5.Significance and Use5.1 The results of this test are used for calculating the totalsolids in the sample;and,by comm
8、on usage,all materialsvolatile at this test temperature are designated as moisture.5.2 Moisture analysis(along with sulfated ash)is a measureof the amount of active polymer in the material and must beconsidered when determining the amount of hydroxyethylcellulose to use in various formulations.6.App
9、aratus6.1 Oven,gravity-convection,capable of maintaining atemperature of 105 6 3C.6.2 Weighing Bottles,low-form,50 mm in inside diameterby 30 mm in height,or equivalent.6.3 Analytical Balance.1These test methods are under the jurisdiction of ASTM Committee D01 onPaint and Related Coatings,Materials,
10、and Applications and are the directresponsibility of Subcommittee D01.36 on Cellulose and Cellulose Derivatives.Current edition approved June 1,2007.Published July 2007.Originally approvedin 1965.Last previous edition approved in 2001 as D2364 01.DOI:10.1520/D2364-01R07E01.2For referenced ASTM stand
11、ards,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.3Reagent Chemicals,American Chemical Society Specifications,AmericanChemical Society,Washing
12、ton,DC.For Suggestions on the testing of reagents notlisted by the American Chemical Society,see Analar Standards for LaboratoryChemicals,BDH Ltd.,Poole,Dorset,U.K.,and the United States Pharmacopeiaand National Formulary,U.S.Pharmacopeial Convention,Inc.(USPC),Rockville,MD.Copyright ASTM Internatio
13、nal,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 7.Procedure7.1 Weigh 5 g of sample to the nearest 0.001 g in a tared andcovered weighing bottle.7.2 Place it in an oven at 105C for 2 h with the coverremoved.Replace the cover,cool in a desiccator,and weigh.8.Calcul
14、ation8.1 Calculate the percent moisture,M,as follows:M 5A/B!3100(1)where:A=mass loss on heating,g,andB=sample used,g.9.Precision and Bias9.1 Statistical analysis of intralaboratory(repeatability)testresults on samples containing from about 3.5%moistureindicate a precision of 60.5%absolute at the 95%
15、confidencelevel.9.2 No statement on bias can be made as no suitablereference material is available as a standard.ASHAS SULFATE10.Scope10.1 This test method covers the determination of theresidue on ignition of hydroxyethylcellulose after a specimenhas been treated with sulfuric acid.11.Summary of Te
16、st Method11.1 A specimen is moistened with sulfuric acid,the excessacid evaporated,the carbonaceous matter burned off,and theresidue ignited in a muffle furnace,cooled,and weighed.12.Significance and Use12.1 Excessive ash can affect solution clarity and filmproperties.The ash(along with moisture)is a measure of theamount of active polymer in the material and must be consid-ered when determining the amount of hydroxyethyl cellulose touse in various formulations.13.Apparatus13.1 Dishes,platinum,50
