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ASTM D3644-06(2012)

(Test Method)

Standard Test Method for Acid Number of Styrene-Maleic Anhydride Resins

Standard Test Method for Acid Number of Styrene-Maleic Anhydride Resins

SIGNIFICANCE AND USE
4.1 This test method is used to determine the property of styrene-maleic anhydride resins functionality. Acid functionality determines the utility of resin as well as being a significant quality control test.
SCOPE
1.1 This test method covers the measurement of the free acidity present in styrene-maleic anhydride resins.  
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

General Information

Status
Historical
Publication Date
30-Sep-2012
ICS
83.080.10 - Thermosetting materials
Technical Committee
D21 - Polishes
Drafting Committee
D21.02 - Raw Materials
Current Stage
Ref Project

Relations

Replaces
ASTM D3644-06 - Standard Test Method for Acid Number of Styrene-Maleic Anhydride Resins
Effective Date
01-Oct-2012
Referred By
ASTM D3643-15(2022) - Standard Test Method for Acid Number of Certain Alkali-Soluble Resins
Effective Date
01-Oct-2012

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ASTM D3644-06(2012) - Standard Test Method for Acid Number of Styrene-Maleic Anhydride ResinsASTM D3644-06(2012) - Standard Test Method for Acid Number of Styrene-Maleic Anhydride Resins
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ASTM D3644-06(2012) - Standard Test Method for Acid Number of Styrene-Maleic Anhydride Resins
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: D3644 − 06(Reapproved 2012)
Standard Test Method for
Acid Number of Styrene-Maleic Anhydride Resins
This standard is issued under the fixed designation D3644; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope where such specifications are available. Other grades may be
used, provided it is first ascertained that the reagent is of
1.1 This test method covers the measurement of the free
sufficiently high purity to permit its use without lessening the
acidity present in styrene-maleic anhydride resins.
accuracy of the determination.
1.2 The values stated in SI units are to be regarded as
5.2 Purity of Water—Unless otherwise indicated, references
standard. No other units of measurement are included in this
to water shall be understood to mean reagent water conforming
standard.
to Specification D1193.
1.3 This standard does not purport to address all of the
5.3 Acetone, conforming to the requirements described in
safety concerns, if any, associated with its use. It is the
Specification D329.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
5.4 Phenolphthalein Indicator Solution (20 g/L)—Dissolve
bility of regulatory limitations prior to use.
10 g of phenolphthalein in 100 mL of acetone.
5.5 Sodium Hydroxide, Standard Solution (0.1 N)—
2. Referenced Documents
Dissolve7gof sodium hydroxide (NaOH) in 7 mL of water,
2.1 ASTM Standards:
and filter the resulting solution through a glass mat in a Gooch
D329 Specification for Acetone
crucible with the aid of suction. Do not wash the residue.
D1193 Specification for Reagent Water
Dilute two thirds of the clear filtrate to 1 L with freshly boiled
water. Standardize against National Institute of Standards and
3. Terminology
Technology standard sample of acid potassium phthalate No.
3.1 Definitions:
84, using phenolphthalein as the indicator. Do not adjust the
3.1.1 acid number—the number of milligrams of potassium
concentration of the solution, but calculate the normality.
hydroxide (KOH) required to neutralize the alkali-reactive
5.6 Sulfuric Acid, Standard Solution (0.1 N)—Measure out
groups in1gof material under the conditions of test.
3mLofconcentratedsulfuricacid(H SO )(d = 1.84)andpour
2 4
it slowly, and with constant stirring, into about 100 mL of
4. Significance and Use
water. Cool to room temperature, mix thoroughly, and dilute to
4.1 This test method is used to determine the property of
1 L. Standardize against 0.1 N NaOH solution, as prepared in
styrene-maleic anhydride resins functionality.Acid functional-
4.5, using phenolphthalein as the indicator. Do not adjust the
ity determines the utility of resin as well as being a significant
concentration of the solution, but calculate the normality.
quality control test.
6. Procedure
5. Reagents and Materials
6.1 Weigh 0.1 g of the sample to the nearest 0.0001 g into
5.1 Purity of Reagents—Reagent grade chemicals shall be
a 250-mL Erlenmeyer flask.
used in all tests. Unless otherwise indicated, it is intended that
6.2 Add 150 6 2 mL of acetone to the flask, stopper it, and
all reagents shall conform to the specifications of the Commit-
swirl it until the sample is dissolved. All 0.2 mL of phenol-
tee onAnalytical Reagents of theAmerican Chemical Society,
phthalein indicator solution and titrate with NaOH solution to
the end point, a faint pink color which persists for 30 s. Then
ThistestmethodisunderthejurisdictionofAST
...

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ASTM D3643-15(2022)(Test Method)
Standard Test Method for Acid Number of Certain Alkali-Soluble Resins

SIGNIFICANCE AND USE
4.1 This test method is not appropriate for alkali-soluble resins whose acid functionality is due to incorporated anhydrides. Variations in manufacture, storage, and possible contamination of anhydride functional resins may cause partial hydrolysis, or esterification, which will invalidate data from this test method. Anhydride functional resins should be characterized by Test Method D3644.  
4.2 This test method is used to measure a property of acid functionalized resins. Acid number determines the utility of resins as well as being a significant quality control measure.
SCOPE
1.1 This test method covers the measurement of the free acidity present in certain alkali-soluble resins.  
1.2 This test method is not suitable for styrene-maleic anhydride resins.  
1.3 The resin manufacturer should specify whether or not this test method may be used for his product(s).  
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
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Standard Test Method for Acid Number of Styrene-Maleic Anhydride Resins

SIGNIFICANCE AND USE
4.1 This test method is used to determine the property of styrene-maleic anhydride resins functionality. Acid functionality determines the utility of resin as well as being a significant quality control test.  
4.2 Because some of the anhydride functionality has been hydrolyzed in the manufacturing process, direct titration with base will produce erroneous data on the total acid content of the fully hydrolyzed resin in use. This test method charges excess alkali to hydrolize the anhydride functionality and neutralize the resulting acid. The remaining unreacted alkali is then back titrated with a standardized acid solution and the acid content is determined by difference.
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1.1 This test method covers the measurement of the free acidity present in styrene-maleic anhydride resins.  
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ASTM D3642-13(2021)(Test Method)
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4.1 In general, with materials of this type, softening does not take place at a definite temperature. As the temperature rises, these materials gradually and imperceptibly change from brittle solids to soft, viscous liquids. For this reason, the determination of the softening point must be made by a fixed, arbitrary, and closely defined methods if the results are to be comparable.
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1.1 This specification2 covers polytetrafluoroethylene (PTFE) prepared by coagulation of a dispersion. These PTFE resins are homopolymers of tetrafluoroethylene or modified homopolymers containing not more than 1 % by weight of other fluoromonomers. The materials covered herein do not include mixtures of PTFE with additives such as colors, fillers, or plasticizers; nor do they include reprocessed or reground resin or any fabricated articles because the properties of such materials have been irreversibly changed when they were fibrillated or sintered.  
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ASTM D7750-23(Test Method)
Standard Test Method for Cure Behavior of Thermosetting Resins by Dynamic Mechanical Procedures using an Encapsulated Specimen Rheometer

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5.1 This method provides a simple means of characterizing the cure behavior of a thermosetting resin specimen that is a representation of a composite part. The diameter of the specimen is approximately 38 mm and the thickness ranges from 2.6 mm to 3.2 mm. This corresponds to a sample volume of approximately 3 cm3 to 4 cm3. The data may be used for quality control, research and development, and verifying the cure within processing equipment including autoclaves.  
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5.3.3 The effects of processing treatments,  
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5.3.5 The effects of reinforcement on cure; the reinforcement can be a fiber or a filler,  
5.3.6 The effects of materials used to bond the resin and reinforcement,  
5.3.7 The effect of formulation additives that might affect processability or performance.  
5.4 This provides a method to assess the cure properties of a thermosetting resin containing woven fiber or other reinforcing materials.  
5.5 This method is valid for a wide range of oscillation frequencies typically from 0.002 Hz to 50 Hz.
Note 1: It is recommended tha...
SCOPE
1.1 This method covers the use of dynamic mechanical instrumentation for determination and reporting of the thermal advancement of cure behavior of thermosetting resin on an inert filler or fiber in a laboratory. It may also be used for determining the cure properties of resins without fillers or fibers. These encapsulated specimens are deformed in torsional shear using dynamic mechanical methods.  
1.2 This method is intended to provide means for determining the cure behavior of thermosetting resins on fibers over a range of temperatures from room temperature to 250 °C by forced-constant amplitude techniques (in accordance with Practice D4065). Plots of complex modulus, complex viscosity, and damping ratio or tan delta as a function of time or temperature, or both, quantify the thermal advancement or cure characteristics of a resin or a resin on filler or fiber.  
1.3 Test data obtained by this method is relevant and appropriate for optimizing cure cycles.  
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.4.1 Exception—The Fahrenheit temperature measurement in 10.1 is provided for information only and is not considered standard.  
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SCOPE
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