Instruments torsional braid analysis

Major instrumentation involved with the generation of thermal property behavior of materials includes thermogravimetric analysis (TG, TGA), DSC, differential thermal analysis (DTA), torsional braid analysis (TBA), thermomechanical analysis (TMA), thermogravimetric-mass spectrometry (TG-MS) analysis, and pyrolysis gas chromatography (PGQ. Most of these analysis techniques measure the polymer response as a function of time, atmosphere, and temperature. 

Dynamic testing DMTA, DMA, torsional braid analysis (Enns and Gillham, 1983) is first used as a thermal analysis method to detect the transitions, using dissipation peaks. Certain commercial DMTA instruments have a relatively low accuracy in measuring forces and/or strains. In contrast, they give relatively accurate values of the damping factor tan 5, so that dissipation spectra tan 8 = f (oo, T), are very useful analytical tools. 

Torsional braid analysis TBA (Plastics Analysis Instruments)... 

In torsional braid analysis (TBA) the sample is impregnated into a multistranded glass braid which acts as support. The method allows analysis of mechanically weak materials, and also materials which are available in very small amounts. Since the specimen is a composite the properties determined are only relative. The main use of TBA is in locating the temperatures of transitions and relaxations. The temperature range available is similar to that given above for conventional torsion pendulums. Manufacturers include Plastics Analysis Instruments Inc., Princeton, NJ, USA. 

Torsional Braid Analyzer (TBA) B 10-1 -1 Plastics Analysis Instruments, Princeton, N.J. 

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