1、Designation:D91412Standard Test Methods forEthylcellulose1This standard is issued under the fixed designation D914;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 o
2、f last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 These test methods cover the testing of ethylcellulose.1.2 The test procedures appear in the following order:SectionsMoisture4 to 6Sulfated Ash7 to 11Chlorides(as Sodium Chloride)12
3、 to 16Ethoxyl Content20 to 24Viscosity25 to 391.3 The values stated in SI units are to be regarded asstandard.The values given in parentheses are for informationonly.1.4 WarningMercury has been designated by EPA andmany state agencies as a hazardous material that can causecentral nervous system,kidn
4、ey and liver damage.Mercury,orits vapor,may be hazardous to health and corrosive tomaterials.Caution should be taken when handling mercury andmercury-containing products.See the applicable product Ma-terial Safety Data Sheet(MSDS)for details and EPAs website(http:/www.epa.gov/mercury/faq.htm)for add
5、itional informa-tion.Users should be aware that selling mercury or mercury-containing products,or both,in your state may be prohibited bystate law.1.5 This standard may involve hazardous materials,operations,and equipment.This standard does not purport toaddress all of the safety concerns,if any,ass
6、ociated with itsuse.It is the responsibility of the user of this standard toestablish appropriate safety and health practices and deter-mine the applicability of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D362 Specification for Industrial Grade Toluene(Withdrawn198
7、9)3D446 Specifications and Operating Instructions for GlassCapillary Kinematic ViscometersD841 Specification for Nitration Grade TolueneD4794 Test Method for Determination of Ethoxyl or Hy-droxyethoxyl Substitution in Cellulose Ether Products byGas ChromatographyE2251 Specification for Liquid-in-Gla
8、ss ASTM Thermom-eters with Low-Hazard Precision Liquids3.Purity of Reagents and Materials3.1 Reagent grade chemicals shall be used in all tests.Unless otherwise indicated,all of the reagents used shallconform to the specifications of the Committee on AnalyticalReagents of the American Chemical Socie
9、ty,where suchspecifications are available.4Where such specifications havenot been established,reagents of the best grade available shallbe used.References to water shall be understood to meandistilled water.MOISTURE4.Scope4.1 This test method covers the determination of the volatilecontent of ethylc
10、ellulose.5.Significance and Use5.1 The results of this test are used for calculating the totalsolids in the sample and,by common usage,all materialsvolatile at this test temperature are designated as moisture.5.2 Moisture analysis(along with sulfated ash)is used tocalculate the amount of active poly
11、mer in the material and shallbe considered when determining the amount of ethylcellulosein various functions.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 Cellulo
12、se and Cellulose Derivatives.Current edition approved July 1,2012.Published September 2012.Originallyapproved in 1947.Last previous edition approved in 2006 as D914 00(2006).DOI:10.1520/D0914-12.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at ser
13、viceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.4Reagent Chemicals,American Chemical Society Specifications,AmericanChemical Society,Wa
14、shington,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 Inter
15、national,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 6.Apparatus6.1 Oven,gravity convection,capable of maintaining atemperature of 105 6 3C.6.2 Weighing Bottles.6.3 Analytical Balance.7.Procedure7.1 Weigh accurately 2 to 5 g of the sample to the nearest0.001 g in
16、to a tared dish(fitted with a lid)and dry for 2 h in anoven at 100 to 105C.Remove the dish from the oven,coverwith a lid,cool in a desiccator,and weigh.8.Calculation8.1 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 PrecisionStatistical analysis of intralaboratory(re-peatability)test results indicates a precision of 65%at the95%confidence level.9.2 BiasNo statement of bias can be made as no suitablereference mat
