What is the difference between tma and dma

Identifying the Tg of polymers is of interest for various reasons, but is most often used for quality control and research and development. As you can see there are various approaches to obtain Tg of polymeric materials. Sometimes trial and error has to be used to see what technique is best. It is extremely important to know which technique and test parameters were used to determine Tg if comparing back to historical data. Similarly, if testing to a specification or industry standard, the technique and test parameters must be well defined.

Even within a test technique, the means of obtaining the Tg can be performed various ways and the result can vary significantly. Have you had experiences where one technique worked much better than another? What are your thoughts? Please leave a comment or question below and our expert, Glenn Sime, will get back with you.

Glenn is based in Pittsfield, Massachusetts. How do you know which testing technique to choose when measuring glass transition temperature? Intertek Global Website. Toggle navigation Intertek. Industries Services. Assurance Enabling you to identify and mitigate the intrinsic risk in your operations, supply chains and business processes. Testing Evaluating how your products and services meet and exceed quality, safety, sustainability and performance standards.

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For example, the flexibility of some DMA machines allows the mechanical measuring part of the unit to be immersed in liquids, which allow for some interesting applications, these include:. Coventive Composites has significant experience in the use of the DMA technique, which we employ in both the development our our own materials, as well as providing a service to external customers.

All modes of operation are available, as well as some of the more unusual set-ups of the equipment. Please feel free to contact us to discuss your testing requirements or visit our website for further details. Twitter Facebook LinkedIn Email.

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Example of commercial DMA instrument. Image courtesy of Mettler Toledo. For example, the flexibility of some DMA machines allows the mechanical measuring part of the unit to be immersed in liquids, which allow for some interesting applications, these include: the measurement of samples of human hair immersed in shampoo in order to monitor the storage modulus.