Dynamic Mechanical Analysis (DMA) - Online Training Course
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- เผยแพร่เมื่อ 9 มิ.ย. 2024
- In this DMA tutorial, we provide information on how Dynamic Mechanical Analysis (DMA) can be applied to help solve your analytical problem.
DMA is an important technique used to measure the dynamic mechanical and viscoelastic properties of materials. The force and displacement amplitudes and phase shift are analyzed as a function of temperature, time and frequency.
In DMA, the sample is subjected to a periodic stress in one of several different modes of deformation. Processes and events measured by the DMA include secondary relaxations, glass transitions, crystallization, solid-solid transitions, crosslinking reactions, melting, flow behavior and the rubbery plateau.
Application examples presented cover the rheological behavior of PET in shear mode, determination of all phase transitions in PTFE measured in shear and tension and the analysis of silicone oil in liquid shear mode. In addition, the characterization of a thin coating, modulus determination of printed circuit board in 3-point bending and the investigation of EVA curing are also presented.
The DMA utilizes revolutionary technology and offers previously unattained performance and timesaving external sample loading.
For more information on DMA (Dynamic Mechanical Analysis)
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thanks this video helped me a lot! excellent quality! thanks!
You're welcome, I am glad it helped!
this video is really helpful, thank you very much!
Glad it was helpful!
This is really helpful 👍. I really love it super explanation any one can understand it easily. I often watch your videos and get so much help.thanks alot for such ammazing content
Hi Ayesha, thank you for watching!
very good video
nice video
Thank you, very useful for my new job.
Great to hear!
Nice
많이 배우고 갑니다
Thank you for watching!
thank you
Your welcome!
Very useful. Thank you. Not sure whether I fully understand why material's behaviour at high frequency is equated to behaviour at low temperature and vice versa. Could somebody elucidate? Thanks
From my understanding:Viscoelastic properties are largely based on response time. The response time is forcibly shortened at high frequencies due to less time between cycles, while at lower temperatures the response time is shortened because cold temperatures slow the "flow" of molecular chains.
cheezwiz7 Thank you. Makes sense.
well explained
Thank you for watching!
How is Storage modulus (E') and Elastic Modulus (E'') calculated by the machine performing DMA without the value of delta?
My guess would be:Delta is the phase shift between the generated stress vs time and strain vs time sin waves. The DMA can calculate this directly because it measures the displacement vs time and the load vs time which can then be used with the cross sectional area to get both sin curves.
can we ensure the cross-linking of thermosetting polymers from the data obtained from DMA
Hi, The effects or properties of crosslinking of thermosets can be investigated by DMA.
Accurate machine. DMA
Thank you! Keep watching
Has anyone studied open time and set time?
Thank you for your message, please ask a local representative. Contact details can be found at www.mt.com under "Contact Us".
13:37
Thanks for watching!
th-cam.com/video/wH3J4DDQWnc/w-d-xo.html Can anybody explain how force can be negative (the part of sin wave below dashed line)? What does it mean?
The sign of the applied force is related to the direction to which the force is being applied. If a force acting up is positive then a force acting down will be considered negative.