ASTM-D7750 2023(Redline)

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D7750-23 Standard Test Method for Cure Behavior of Thermosetting Resins by Dynamic Mechanical Procedures using an Encapsulated Specimen Rheometer (Redline)

Published By	Publication Date	Number of Pages
ASTM	2023	11

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Categories: 83.080.10 - Thermosetting materials, ASTM

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Description

ASTM D7750-23

Redline Standard: Standard Test Method for Cure Behavior of Thermosetting Resins by Dynamic Mechanical Procedures using an Encapsulated Specimen Rheometer

ASTM D7750

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.

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.

1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

Keywords

complex viscosity; composites; cure behavior; dynamic property; flow; prepregs; rheological behavior; storage shear modulus; thermosetting resins; viscosity; viscous shear modulus;

ICS Code

ICS Number Code 83.080.10 (Thermosetting materials)

DOI: 10.1520/D7750-23

Additional information

Standard Title	D7750-23 Standard Test Method for Cure Behavior of Thermosetting Resins by Dynamic Mechanical Procedures using an Encapsulated Specimen Rheometer (Redline)
Published Code	ASTM
Publication Date	2023
Pages Count	11
ICS Codes	83.080.10 - Thermosetting materials