1、Designation: D4142 89 (Reapproved 2017)Standard Guide forTesting Epoxy Resins1This standard is issued under the fixed designation D4142; 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 parenth
2、eses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This guide covers methods for testing epoxy resins aslisted in Table 1. All of the methods were tested by interlabo-ratory participation in accordance w
3、ith usual ASTM guide-lines. Each method specifies a recommended amount of samplefor starting a separate analysis, but several of the procedurescan be conducted on the same starting material if so desired.For example, viscosity, color, and density could be run on thesame specimen.1.2 This standard do
4、es 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.1.3 This international standard was
5、 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. Reference
6、d Documents2.1 ASTM Standards:2D445 Test Method for Kinematic Viscosity of Transparentand Opaque Liquids (and Calculation of Dynamic Viscos-ity)D1209 Test Method for Color of Clear Liquids (Platinum-Cobalt Scale)D1259 Test Methods for Nonvolatile Content of ResinSolutionsD1475 Test Method For Densit
7、y of Liquid Coatings, Inks,and Related ProductsD1544 Test Method for Color of Transparent Liquids (Gard-ner Color Scale)D1545 Test Method for Viscosity of Transparent Liquids byBubble Time MethodD1639 Test Method for Acid Value of Organic CoatingMaterials (Withdrawn 2005)3D1652 Test Method for Epoxy
8、 Content of Epoxy ResinsD1726 Test Methods for Hydrolyzable Chloride Content ofLiquid Epoxy ResinsD1847 Test Methods for Total Chlorine Content of EpoxyResins (Withdrawn 2007)33. Significance and Use3.1 This guide directs the user to test methods that deter-mine properties generally accepted as stan
9、dard test items forclassification of epoxy resins.4. Epoxy Content4.1 The epoxy content of epoxy resins is determined byreacting a solution of the resin with a standard solution ofhydrogen bromide in glacial acetic acid. The quantity of acidconsumed is a measure of the epoxy content. Test MethodsD16
10、52 was found to have a repeatability of 2 % of the epoxycontent and a reproducibility of 6 % of the epoxy content.5. Hydrolyzable Chlorine5.1 Test Method D1726 covers the determination of theeasily hydrolyzable chlorine content of liquid epoxy resins inconcentrations below 1 weight %. The specimen i
11、s refluxedwith a known amount of a standard alcoholic potassiumhydroxide solution. The amount of hydroxide consumed ismeasured by titration and corresponds to the hydrolyzablechlorine content of the resin. By interlaboratory testing, therepeatability was found to be 0.02 %, and the reproducibilitywa
12、s found to be 0.05 %, both absolute.6. Total Chlorine6.1 Organic and inorganic chlorine compounds are deter-mined in epoxy resins in accordance with Test Methods D1847.The resin specimen is oxidized by combustion in a bombcontaining oxygen under pressure. The chlorides formed aredissolved in a sodiu
13、m carbonate solution and then either1This guide is under the jurisdiction of ASTM Committee D01 on Paint andRelated Coatings, Materials, and Applications and is the direct responsibility ofSubcommittee D01.33 on Polymers and Resins.Current edition approved June 1, 2017. Published June 2017. Original
14、lyapproved in 1982. Last previous edition approved in 2009 as D4142 89 (2009).DOI: 10.1520/D4142-89R17.2For 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
15、 Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with
16、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.1titrated or determined gravimetrically. The
17、 absolute repeatabil-ity and reproducibility for the titration method are 0.02 and0.05 weight %, respectively. For the gravimetric method, therepeatability and reproducibility are both reported to be 0.05weight %, absolute.7. Viscosity7.1 Kinematic viscosity is determined by measuring thetime for a
18、volume of liquid to flow under gravity through acalibrated glass capillary viscometer in accordance with TestMethod D445. The dynamic viscosity can be obtained bymultiplying the measured kinematic viscosity by the density ofthe liquid. The limits of precision at the three sigma level ofconfidence we
19、re found to be 0.35 % relative within onelaboratory and 0.70 % relative between laboratories.7.2 It is also possible to measure viscosity by the bubbletime method described in Test Method D1545. The rise time ofa bubble in the resin contained in an ASTM viscosity tube ismeasured. The rise time in se
20、conds is approximately equal tothe viscosity in stokes. In the range from 4.5 to 440 St,duplicate runs by one operator should be considered suspect ifthey differ by more than 4.9 % relative. Two results, each themean of duplicates obtained by different operators should beconsidered suspect if they d
21、iffer by more than 9.0 % relative.8. Color8.1 Test Method D1544 covers the measurement of thecolor of transparent liquids by means of comparison witharbitrarily numbered glass standards. Two results obtained by asingle operator should be considered suspect if they differ bymore than two thirds of a
22、color number. Two results, each themean of duplicate measurements obtained by operators indifferent laboratories should be considered suspect if theydiffer by more than four thirds of a color number.8.2 The color of epoxy resins having light absorptioncharacteristics nearly identical with those of t
23、he platinum-cobalt color standards can be measured by the use of TestMethod D1209.9. Density9.1 Test Method D1475 is applicable to liquid epoxy resins.This test method makes use of a weight-per-gallon cup and isparticularly useful where the fluid to be measured has a highviscosity or where a compone
24、nt is too volatile for a specificgravity balance determination. The limits of precision at thethree sigma level of confidence were found to be 60.008 lb/galwithin one laboratory and 6 0.015 lb/gal between laboratories.10. Nonvolatile Content10.1 Since epoxy resins tend to release solvent slowly, it
25、ispreferred to use a thin film or “foil method,” in which the resinis pressed between sheets of aluminum foil to spread it to a thinfilm. Method B of Test Methods D1259 is applicable to epoxyresins. The repeatability is 0.3 % and the reproducibility is0.5 %, both absolute.11. Acid Value11.1 Acid val
26、ue of an epoxy resin as determined by TestMethod D1639 is expressed as the number of milligrams ofpotassium hydroxide required to neutralize the free acidity of 1g of nonvolatile material under the condition of the test.12. Keywords12.1 epoxy resinsASTM International takes no position respecting the
27、 validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is
28、 subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Hea
29、dquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This st
30、andard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or
31、serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 1 Methods for Testing Epoxy ResinsTest Method Section ASTM DesignationEpoxy content 4 D1652Hydrolyzable chlorine 5 D1726Total chlorine 6 D1847Viscosity 7 D445, D1545Color 8 D1544, D1209Density 9 D1475Nonvolatile content 10 D1259Acid value 11 D1639D4142 89 (2017)2
