NetComposites
Advanced Engineering 2018

New ASTM Composites Standard Focuses on Glass Transition Temperature

14 April 2008

A new ASTM International standard will enable composite end users and materials suppliers within the aerospace industry to perform an important test for polymer matrix composites within guidelines set by the U.S. Federal Aviation Administration.

The standard, D7028, Test Method for Glass Transition Temperature (DMA Tg) of Polymer Matrix Composites by Dynamic Mechanical Analysis (DMA), is under the jurisdiction of Subcommittee D30.04 on Lamina and Laminate Test Methods, part of ASTM Committee D30 on Composite Materials.

According to Michael Stuart, D30 member and senior technical service engineer, Cytec Engineered Materials Inc., the new test method provides instructions on how to measure the glass transition temperature of continuous fiber reinforced composites to determine whether the material falls within FAA guidelines. The DMA Tg value is frequently used to indicate the upper use temperature of composite materials, as well as for quality control of these materials.

Stuart says that ASTM D7028 will be used for research, material characterization and screening and other programs. In addition, the standard will allow for greater and more effective use of glass transition temperature testing. “Many different instruments and analysis methods, which can produce profoundly different values, are used for glass transition temperature measurements,” says Stuart. “A standard was needed to define the test procedure and protocol for Tg measurements to facilitate broader usage within the composites industry.”

Stuart says that the subcommittee welcomes new members to address future revisions of D7028 and related standards, as well as to work on the development of proposed new standards.






Related / You might like...

Alvant Supports £28m Safran-Led Aircraft Landing Gear Project

Alvant has been appointed to work on a two-year, £28 million project titled Large Landing Gear of the Future, which aims to deliver a 30% weight reduction and assist the aerospace industry’s drive to reduce fuel consumption and carbon emissions.

3D Printed Drone Prototype Wins Red Dot 2018 Design Award

Hexadrone’s 3D printed Tundra prototype, manufactured by CRP Technology via laser sintering (LS) technology using Windform SP and Windform XT 2.0 carbon composite materials, has won the Red Dot Award 2018 in the drone category.

Norco Composites Invests in New Equipment

UK company Norco Composites has invested in a larger spray booth and a new cutting and kitting machine to enable the company to increase productivity in line with growing demand from its marine customers.