ASTM_D_1824_-_16.pdf

Designation:D182416Standard Test Method forApparent Viscosity of Plastisols and Organosols at LowShear Rates1This standard is issued under the fixed designation D1824;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.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope*1.1 This test method covers the measurement of plastisoland organosol viscosity at low shear rates.1.2 Apparent viscosity at high shear rates is covered in TestMethod D1823.1.3 The values stated in SI units are to be 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.NOTE1This test method resembles ISO 3219-1977 in title only.Thecontent is significantly different.2.Referenced Documents2.1 ASTM Standards:2D1755 Specification for Poly(Vinyl Chloride)ResinsD1823 Test Method for Apparent Viscosity of Plastisols andOrganosols at High Shear Rates by Extrusion ViscometerE1 Specification for ASTM Liquid-in-Glass ThermometersE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test Method2.2 ISO Standard:ISO 3219-1977:Polymers in the Liquid,Emulsified,orDispersed StateDetermination of Viscosity With a Ro-tational Viscometer Working at a Defined Shear Rate33.Summary of Test Method3.1 The sample is conditioned to the proper temperature andits viscosity is determined.4.Significance and Use4.1 The suitability of a dispersion resin for any givenapplication process is dependent upon its viscosity character-istics.4.2 The viscosity defines the flow behavior of a plastisol ororganosol under low shear.This viscosity relates to theconditions encountered in pouring,casting,molding,anddipping processes.5.Apparatus5.1 Viscometer,Concentric Cylinder RotationalThe es-sential instrumentation required providing the minimum rota-tional viscometer analytical capabilities include:5.1.1 A drive motor to apply a unidirectional displacementto the specimen at a rate from 0.5 to 60 r/min constant to60.5%.5.1.2 A force sensor to measurement the torque developedby the specimen by the rotational element.5.1.3 A coupling shaft,or other means,to transmit therotational displacement from the motor to the spindle.NOTE2It is helpful to have a mark on the shaft to indicate appropriatetest fluid level.5.1.4 A rotational element,spindle or tool of the rightcircular cylindrical shape as shown in Fig.1,to fix thespecimen between the drive shaft and a stationary position.NOTE3The rotational element dimensions L and D,are selected sothat the measured viscosity is between 10 and 90%of the range of thatelement.5.1.5 A data collection device,to provide a means ofacquiring,storing,and displaying measured or calculatedsignals,or both.The minimum output signals required forrotational viscometry are torque,rotational speed,temperatureand time.NOTE4Manual observation and recording of data are acceptable.1This test method is under the jurisdiction of ASTM Committee D20 on Plasticsand is the direct responsibility of Subcommittee D20.15 on Thermoplastic Materi-als.Current edition approved April 1,2016.Published April 2016.Originallyapproved in 1961.Last previous edition approved in 2010 as D1824-95(2010).DOI:10.1520/D1824-16.2For 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.3Available from American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.org.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 5.1.6 A stand to support,level,and adjust the height of thedrive motor,shaft and rotational element.5.1.7 Auxiliary instrumentation considered useful in con-ducting this method includes:5.1.7.1 Data analysis capability to provide viscosity,stressor other useful parameters derived from the measured signals.5.1.7.2 A level to indicate the vertical plumb of the drivemotor,shaft and rotational element.5.1.7.3 A guard or other method to protect the rotationalelement from mechanical damage due to contact between therotational element and the container walls.5.2 Sample Containers,Tin Cans,or Glass Jars,500-mL(1-pint)capacity with minimum dimensions of 80 mm(3.15in.)inside diameter by 80 mm(3.15 in.)depth.5.3 Temperature Measurement DeviceASTM SolventsDist