ASTM E1640 Standard Test Method for Assignment of the Glass Transition Temperature By Dynamic Mechanical Analysis

    ASTM E1640 Introduction

    This test method locates the glass transition region and determines the glass transition temperature of amorphous and semi-crystalline materials. MaTestLab is one of the best testing service providers, with the best network of testing laboratories in the USA to carry out ASTM E1640 tests for our clients. This method is valuable for quality control, specification acceptance, and research.

    Read more

    Get Certified ASTM E1640 for Accurate Thermal Performance Evaluation

    ASTM E1640 is a certification that provides a company with assurance that the methodology used to reach the glass transition temperature is based on an internationally accepted and technically viable method. Testing Certified testing means consistency, accuracy, and traceability of Tg data to assist in material qualification, product validation, and regulatory compliance. ASTM E1640 assurance increases hours of polymer performance reliability and supplier and laboratory reliability.

    Scope of ASTM E1640

    • Determines glass transition temperature by means of dynamic mechanical analysis. Applicable to polymer matrix composites, elastomers, and polymers. 
    • Quantifies viscoelastic response in terms of temperature. 
    • Identifies Tg through damping or modulus. 
    • Facilitates material comparison and thermal analysis.

    ASTM E1640 Equipment and Sample Preparation

    Specimen DetailThe ASTM E1640-13 test technique uses dynamic mechanical analyzers to find the glass transition temperature (Tg) of thermally stable materials in the glass transition zone.
    Specimen SizeAlthough the size and shape of samples for examination can vary, they are usually examined in a rectangular format. The size range of appropriate specimens is 1 × 5 × 20 mm to 1 × 10 × 50 mm.

    Use / Applications of ASTM E1640

    • Polymer material quality control. 
    • Comparison of polymer grades and formulations. 
    • Curing and crosslinking effects evaluation. 
    • Composite thermal performance test. 
    • Preservation of nanotechnologies in polymers. 
    • Selection of material in temperature-sensitive applications. 
    • Checking the temperature limit of processing and service.

    ASTM E1640 Common Challenges and Troubleshooting

    The typical issues are the geometry of the specimen being wrong, the wrong choice of the test mode, and the wrong temperature calibration. Overstrain may result in nonlinear behaviour, resulting in inaccurate Tg assignment. To reduce these problems, small deformation amplitudes are used, the material is properly calibrated, and the test conditions are chosen so that the material is kept in the linear viscoelastic region.

    Read more

    ASTM E1640 Technique, Process, and Data Collection

    The specimen is placed in the DMA, and it is subjected to a minor oscillatory deformation with heating at a constant rate. On rising of temperature, the variation of storage modulus, loss modulus, and tan 0 is noted. The glass transition temperature is determined depending on a given characteristic of the DMA response; this can be the peak in tan 0 or a reversal in the slope of the modulus.

    ASTM E1640 Testing Procedure and Requirements

    Specimen PreparationPolymer specimen prepared to the required dimensions
    Instrument CalibrationDMA instrument calibrated for force and temperature
    Test Mode SelectionAppropriate deformation mode selected (bending, tension, shear)
    Temperature ProgrammingA controlled heating rate applied
    Tg AssignmentGlass transition identified from DMA response

    ASTM E1640 Analysis Results and Interpretation

    The result of the ASTM E1640 gives an accurate determination of Tg, which is the starting point of the high mobility of the polymer. The glass transition region is marked by a sharp change in storage modulus or a peak in damping. An increase in Tg indicates a higher thermal resistance, and a decrease is possible to imply a plasticization or incomplete curing of the material. 

    Read more

    ASTM E1640 Problem & Solution

    Problem: Unexpected softening or loss of mechanical performance at elevated temperatures.
    Solution: ASTM E1640 testing is an effective way of determining the glass transition temperature, which allows selecting the material correctly and making design changes to guarantee the successful operation within the required temperature limits.

    FAQ

    Where can I get the astm e1640 tested?
    You can share your astm e1640 testing requirements with MaTestLab. MaTestLab has a vast network of material testing laboratories, spread across the USA and Canada. We support your all material testing needs ranging from specific astm e1640 test to various testing techniques.
    Please contact us for a detailed quote for your astm e1640 testing needs. Cost incurred to carry out different astm e1640 testing methodology depends on the type of raw material; number of samples, coupons, or specimens; test conditions, turn around time etc. Costs of some ASTM testing methods start from $100 and the final value depends upon the factors listed above. Please contact us for the best and latest prices.
    The required number of samples or specimens should comply with the procedure given in the astm e1640 standard. However, the MaTestLab operations team can assist you for your special requirements once you share your testing details with us.
    MaTestLab has a vast testing laboratory network, hence we bring you the best testing facilities in a cost-effective way. We offer considerable discounts (15-20%) to our returning customers based on test volume and frequency.
    The turnaround time for astm e1640 test methodology depends upon the test procedure mentioned in the standard test document. However, we at MaTestLab understand your research requirements and hence try to get your test completed within the least possible time.
    rowanjenkins
    About Author
    rowanjenkins
    Testimonials
    Real results
    Engineers trust us with what matters most
    Start Your Testing
    Project Today
    Define your requirements and get access to
    specialized laboratories ready to deliver results
    Start Testing
    Contact us
    Partners with us
    Clients
    Vendors
    Process for testing
    • STEP 01

      You share your testing requirements

    • STEP 02

      You share your sample(s)

    • STEP 03

      We deliver your test reports

    Get your testing done

    Let us known your testing requirements and we will be right back with a solution.

      Let us root for each other. Collaborate to grow, expand, and accelerate our businesses.

      Partner with us

        Contact Us

        Discover more from MaTestLab

        Subscribe now to keep reading and get access to the full archive.

        Continue reading