TMA
Análise-Termomecânica (TMA)
Vários materiais passam por mudanças termomecânicas durante aquecimento ou resfriamento. Por exemplo, mudança de fase, processo de sinterização ou amolecimento, podem ocorrer por causa da expansão térmica.
O TMA pode determinar importantes aspectos da composição, estrutura, condição de produção ou possíveis aplicações para diferentes materiais. A faixa de aplicação dos instrumentos de análises termomecânicas vai do controle de qualidade até a pesquisa e desenvolvimento. Comumente encontramos o TMA nas indústrias de plástico e elastômeros, tintas e corantes, compósitos, adesivos, fibras e películas, cerâmicas, vidro e metais.
Análise Ternomecânica (TMA) determina mudanças dimensionais de sólidos, líquidos ou de materiais pastosos em função da temperatura e/ou tempo submetido a uma força mecânica definida (DIN 51 005, ASTM E831, ASTM D696, ASTM D3386, ISO 11359 – Parte 1 até 3). É fortemente relacionado com Dilatometria (dilatômetro vertical), que determina mudanças de comprimento de uma amostra submetida a uma força desprezível (e.g. DIN 51 045).
TMA 402 F3 Hyperion® Polymer Edition
Thermomechanical Analysis – TMA - Tailor-Made for Low-Temperature Applications
Polymers undergo changes in their thermomechanical properties during heating and cooling. TMA analyses can give insights into molecular orientation and quenching effects during cooling. It allows the design of adhesives and other hybrid joints and quality control of shrink films.
TMA 402 F1 /F3 Hyperion®
Thermomechanical Analyzer - Vertical Dilatometer
Modular Concept with interchangeable furnaces (compatible with other NETZSCH instruments) for easy and cost-effective expansion and retrofitting.Gas flows with up to 4 MFCs, controllable via software with programmable atmosphere change for the analysis of e.g. OxidationOxidation can describe different processes in the context of thermal analysis.Oxidation behavior without manual valve operation
Thermal Expansion
The linear thermal expansion is an important variable for assessing the dimensional behavior of a material in response to a change in temperature.
This plot shows the thermal expansion (dL/L0 in %) of an epoxy resin between -70°C and 270°C. In the first heating (blue curve), the onset of the Temperatura de Transição VítreaThe glass transition is one of the most important properties of amorphous and semi-crystalline materials, e.g., inorganic glasses, amorphous metals, polymers, pharmaceuticals and food ingredients, etc., and describes the temperature region where the mechanical properties of the materials change from hard and brittle to more soft, deformable or rubbery.glass transition (Tg) occurs at 123°C. In the second heating (red curve), the onset of Tg is slightly shifted, to 125°C. This shift could be due to RelaxationWhen a constant strain is applied to a rubber compound, the force necessary to maintain that strain is not constant but decreases with time; this behavior is known as stress relaxation. The process responsible for stress relaxation can be physical or chemical, and under normal conditions, both will occur at the same time. relaxation effects or post-curing.
Literatura de aplicativos
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Our NETZSCH applications laboratory is providing contract testing services for a wide range of industries and research centers. It is equipped with state-of-the-art testing instruments allowing for a variety of thermal analysis measurements to be carried out.
Consult with the experts in our applications labs to choose the best-suited measuring method for your specific needs.