What is a DMA instrument?
Dynamic Mechanical Analysis (DMA) is a testing technique and related analytical instrument that measures the physical properties of solids and polymer melts, reports modulus and damping, and is programmable to measure force, stress, strain, frequency and temperature.
What is the difference between TMA and DMA?
DMA data is used to obtain modulus information while TMA gives coefficient of thermal expansion, or CTE. Both detect transitions, but DMA is much more sensitive. Some TMAs can do limited DMA and the PerkinElmer® DMA 8000 is the only DMA that can do TMA.
What is the principle of DMA?
Definitions of Dynamic Mechanical Analysis (DMA) A technique in which the sample’s kinetic properties are analyzed by measuring the strain or stress that is generated as a result of strain or stress, varies (oscillate) with time, applied to the sample.
What are the applications of DMA?
Many hardware systems use DMA, including disk drive controllers, graphics cards, network cards and sound cards. DMA is also used for intra-chip data transfer in multi-core processors. Computers that have DMA channels can transfer data to and from devices with much less CPU overhead than computers without DMA channels.
What is TGA and TMA?
Volatile decomposition products can be identified by connecting the TGA to a Fourier transform infrared spectrometer (FTIR) or a mass spectrometer (MS). Thermomechanical Analysis (TMA) Thermomechanical analysis measures the dimensional changes of a sample as it is heated or cooled in a defined atmosphere.
What is DSC analysis?
DSC is a thermal analysis apparatus measuring how physical properties of a sample change, along with temperature against time. 10. In other words, the device is a thermal analysis instrument that determines the temperature and heat flow associated with material transitions as a function of time and temperature.
What is the use of DMA controller?
DMA controllers can seamlessly transfer data between memory and on-chip peripherals, or between memories without CPU intervention. This allows the CPU to handle other tasks while the DMA controller transfers data. Both P-DMA and M-DMA have multiple independent DMA channels.
What is DTA curve?
The DTA curve is a curve of temperature difference between the sample material and the reference material versus temperature or time. Applications of DTA include: DTA is widely used in the pharmaceutical and food industries. DTA may be used in cement chemistry, mineralogical research, and environmental studies.
What is tan delta in DMA?
DMA Viscoelastic Parameters The ability of the material to dissipate energy. Energy lost as heat. The Modulus: Measure of materials overall resistance to deformation. Tan Delta: Measure of material damping – such as vibration or sound damping.
Which device uses a DMA channel?
What is DMA explain with example?
Direct memory access (DMA) is a method that allows an input/output (I/O) device to send or receive data directly to or from the main memory, bypassing the CPU to speed up memory operations. The process is managed by a chip known as a DMA controller (DMAC).
Why TA Instruments DMA’s?
Utilizing the latest technological breakthroughs TA Instruments DMA’s provide the best performance and ease-of-use. Dynamic Mechanical Analysis measures the mechanical properties of materials as a function of time, temperature, and frequency.
How do you perform an axial DMA test on thin films?
Axial DMA tests on thin films requires maintaining the axial force above the oscillation force to hold the sample in tension throughout the test. This capability is highlighted in the plot showing a temperature ramp on 50μm thick PET film tested using tension geometry over a temperature range of -100 °C to 250 °C.
Why choose tata instruments discovery DMA 850?
TA Instruments invites you to experience the ultimate in Dynamic Mechanical Analyzers, the Discovery DMA 850. Building on superior technologies of the world’s best-selling DMA, improvements in every aspect of DMA performance deliver the most accurate and reproducible measurement of mechanical properties over a wide temperature range.
What are the factors influencing TG in DMA experiments?
•Definition •Factors influencing Tg •Determination of cross-linking density −Evaluation of polymer blends and compatibility −Effect of anisotropy on mechanical properties −Influence of additives •Fillers •Plasticizers −Application of creep-recovery and stress relaxation tests Summary: Troubleshooting DMA experiments 111