ASTM D – Designation: D – 06 Standard Practice for Plastics: Dynamic Mechanical P. ASTM D Standard Practice for Plastics: Dynamic Mechanical Properties: Determination and Report of Procedures. standard by ASTM. dpdf – Download as PDF File .pdf), Text File .txt) or read online. This practice is under the jurisdiction of ASTM Committee D20 on Plastics and.
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ASTM G39 – 99 D — 06 Standard Practice for Plastics: Determination and Report of Procedures 1 This standard is issued under the xed designation D ; 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 asm parentheses indicates the year of last reapproval. A superscript adtm e indicates an editorial change since the last revision or reapproval. This standard has been approved for use by agencies of the Department of Defense.
Dynamic Mechanical Analysis ASTM D, D, D
It incorporates laboratory practice for determining dynamic mechanical properties of plastic specimens subjected to various oscillatory deformations on a variety of instruments of the type awtm called dynamic mechanical analyzers or dynamic thermomechanical analyzers. Plots of elastic and loss moduli are indicative of the viscoelastic characteristics of a plastic.
These moduli are functions of temperature or frequency in plastics, and change rapidly at particular temperatures or frequencies. The regions of rapid moduli change are normally referred to d40665 transition regions. Without changing the observed data, reporting in full as described in this practice the conditions under which the data were obtained will enable apparent differences observed in another study to be reconciled.
An assumption of this technique is that testing is conducted d406 the region of linear viscoelastic behavior. The values given in brackets are for information only.
It is the responsibility of the user of this practice to establish appropriate safety and health practices and determine the f4065 of regulatory limitations prior to use. Specic hazards statements are given in Section 8. Current edition approved Dec. Originally approved in Last previous edition approved in as D – Summary of Practice 4.
Dynamic Mechanical Analysis ASTM D4065, D4440, D5279
Elastic or loss moduli, or both of the specimen are measured while varying time, temperature of the specimen or frequency of the oscillation, or both the latter. Plots of the elastic or loss moduli, or both, are indicative of viscoelastic characteristics of the specimen.
Rapid changes in viscoelastic properties at particular temperatures, times, or frequencies are normally referred to as transition regions. NOTE 2—The particular method for measurement of elastic and loss moduli depends upon the operating principle of the instrument used.
Therefore, consult the appropriate material specication before using this practice. Instruments of this type are commonly called dynamic mechanical or dynamic thermomechanical analyzers.
They typically operate in one of seven oscillatory modes: The deformation strain shall be applied and then released, as in free-vibration devices, or continuously applied, as in forcedvibration devices see Table 1.
ASTM D4065 Plastic Dynamic Mechanical Properties | Testing Machine
Any temperature programmer should be sufficiently stable to permit measurement of sample temperature to Signicance and Use 5. A plot of the elastic modulus and loss modulus asttm material versus temperature provides a graphical representation of elasticity and damping as a function of temperature or frequency.
In the temperature ranges where signicant changes occur, elastic modulus decreases rapidly with increasing temperature at constant or near constant frequency or increases sstm increasing frequency at constant temperature. A maximum is observed for the loss modulus, as well as for the tan delta curve, in the transition region. If some heat treatment is applied to the specimen astn obtain f4065 preferred analytical form, this treatment shall be noted in the report. In many cases, a specimen of 0.
NOTE 3—It is important to select a specimen size consistent with the modulus of the material under test and capabilities of the measuring apparatus. For example, while thick specimens of low modulus materials are suitable for measurement, thin specimens of high modulus materials are required.
Dfor those tests where conditioning is required.
ASTM D Plastic Dynamic Mechanical Properties | Testing Machine
If other specimen conditioning is used, it should be noted in the report. Refer to EEand E for additional details on calibration. Mechanical spectrometerB,C Sinusoidal xed or variable frequency Forced constant amplitude; xed or variable frequency-torsional oscillation see Fig. C Instruments of this type are available from Rheometric-Scientic, Inc.
NOTE 4—Preferably, tests conducted over a temperature range should be performed in incremental steps or at a rate slow enough to allow temperature equilibrium throughout the entire specimen.
The time to reach equilibrium will depend upon the mass of the particular specimen and the gripping arrangement. The effect of heating rate is observed by running specimens at two or more rates and comparing the elastic and viscous property results obtained. NOTE 5—The accuracy required of the temperature measurement will depend upon the rate of change of moduli with temperature of the plastic being investigated.
In transition regions, experience has indicated that the specimen temperature should be read to Clearly label the abscissa with title and units of measurement. D — 06 The abscissa should be clearly labeled with title and units of measurement.
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