Laboratory of Thermal, Thermomechanical and Electrical Properties | Ft.Tul.cz

THERMO

The main objectives and activities

• Study of structural parameters of textiles and materials using thermal analysis methods,
• Identification of the material,
• Tracking of mechanical, structural and reaction properties of materials in relation to the thermal load.

Specific devices and outcomes

• Differential Scanning Calorimetry (DSC)
• Thermomechanical Analysis (TMA)
• Dynamic-Mechanical Analysis (DMA)
• Thermogravimetry (TGA)

Specialization of the laboratory

• Measurement of transition temperature (Melting, Glass transition, Crystallization),
• Determining the degree of crystallinity and thermal coloration,
• Evaluation of enthalpy of thaw, enthalpy networking and curing, reaction kinetics and efficiency of antioxidants,
• Analysis of copolymers and blends of polymers,
• Thermal and oxidative stability,
• Effectiveness of fire retardants,
• Volatilization of low molecular weight, polycondensation product, solvents, determination of fillers,
• Coefficient of thermal expansion,
• Thermo-mechanical properties, tensile modulus and shear, real and imaginary component module, loss angle.

ELECTRO

The main objectives and activities

• Modification of conducting fibers for new uses,
• Development of textile sensors and sensors suitable for use in textiles,
• Modeling of electrical properties of textile fibers using computer assisted designing,
• Development of evaluation methods of anisotropy electrical properties of materials.

Specific devices and outcomes

• Circumferential analyzers (Rohde & Schwarz) - preparation of samples for measurement of electromagnetic shielding (textile, sandwich structures, composite materials and other specific materials, etc.),
• Impedance / material analyzer – Agilent E4991A + Dielectric material test fixture – Agilent 16453A (measurement of dielectric permittivity in a range 1 MHz - 1 GHz),
• Universal frequency counter – Agilent 53131A,
• Resistance meter – HP 4339B + extenders on measuring volume resistivity, surface resistivity, of surface directional resistivity,
• Stat – charge FD-28 (for measurement of electrostatic hubs),
• Polystat (for measurement of potential of the sample),
• LCR meter–measurement of resistance, capacitance and inductance,
• TEPAO MMETP E6-13A (for resistance measurement),
• Handheld meter for measurement of microwave radiation leakage.

Specialization of the laboratory

• Measurement and analysis of electrical properties of textile structures,
• Development of special materials with the use of conducting fibers.

Evaluation of material parameters

• Surface resistivity of materials [Ω] and bulk resistivity materials of [Ω.m],
• Anisotropy of surface and volume resistivity of materials,
• Capacity of materials (including dependence on deformation of test material),
• Measuring the percolation threshold of conductive material with the proportion of conductive phase,
• Measuring the polarity and amount of charge generated by rubbing two materials and its size in the range of 3-30 kV.cm-1,
• Surface potential of insulators,
• Permittivity of materials and electromagnetic shielding of materials.