ASTM_D_5226_-_21.pdf

Designation:D522621Standard Practice forDissolving Polymer Materials1This standard is issued under the fixed designation D5226;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.Scope*1.1 This practice outlines the parameters applicable to thepreparation of a polymeric solution,such as solvent,concentration,temperature,pressure,time,agitation,and heat-ing mode.1.2 The proper use of this practice requires knowledge ofsolvents and their effect on polymeric materials.1.3 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 safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.NOTE1There is no known ISO equivalent to this standard.1.4 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:2D883 Terminology Relating to PlasticsD1600 Terminology forAbbreviated Terms Relating to Plas-tics2.2 Other Document:Polymer Handbook33.Terminology3.1 For definitions of terms that appear in this practicerelating to plastics,refer to Terminology D883.3.2 Abbreviations are in accordance with TerminologyD1600.4.Summary of Practice4.1 A polymer solution is described or prepared using thecell classifications listing the parameters relative to solvate thepolymer.The cell classifications are listed in the followingorder:polymer,solvent,concentration,temperature,time,container,heating mode,and agitation.4.1.1 A polymer and a list of suggested solvents for makinga solution are listed in Annex A1.4.1.2 Table 1 designates the parameters for container,heat-ing mode,and type of agitation.NOTE2To illustrate the use of the cell classifications with Table 1,a2%solution of poly(vinyl chloride)using cyclohexanone would bewritten as:PVC2 cyclohexanone2 202 662 402 BECwhere:PVC=abbreviation of the polymer from Annex A1,cyclohexanone=the solvent from Annex A1,20=weight of polymer in tenths of a percent,66=temperature in degrees Celsius,40=time in tenths of an hour,B=glass container from Table 1,E=bath heater from Table 1,andC=random agitation from Table 1.5.Significance and Use5.1 This practice embodies the specifications to describe thepreparation of a polymeric solution.6.Procedure6.1 PolymerSelect the applicable polymer fromAnnexA1and write its abbreviation.6.2 SolventSelect the solvent applicable to the polymerfrom Annex A1.6.3 ConcentrationWrite the polymer gram weight intenths of a percent per milliliter of solvent.6.4 TemperatureWrite the solution temperature in degreesCelsius.6.5 TimeWrite the time for solution in tenths of an hour.6.6 ContainerSelect the type of container from Table 1.6.7 Heating ModeSelect the heating mode from Table 1.6.8 AgitationSelect the agitation mode from Table 1.1This practice is under the jurisdiction ofASTM Committee D20 on Plastics andis the direct responsibility of Subcommittee D20.70 on Analytical Methods.Current edition approved Jan.15,2021.Published January 2021.Originallyapproved in 1992.Last previous edition approved in 2016 as D5226-16.DOI:10.1520/D5226-21.2For 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 John Wiley and Sons,New York,NY.*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 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.17.Precision and Bias7.1 No statement is made about the precision or bias of thispractice since the procedure is descriptive with no measure-ments being made.8.Keywords8.1 polymer solutions;solution preparation;solutions;sol-ventsANNEX(Mandatory Information)A1.SUGGESTED SOLVENTS FOR POLYMERIC SOLUTIONSA1.1 Note the following:A1.1.1 The solvents in Table A1.1 are listed in randomorder.A1.1.2 An increase in polymer molecular weight reducessolubility.A1.1.3 Branching increases the solubility compared to alinear polymer of the same molecular weight.A1.1.4 Solubility normally increase