Glass transition temperatures of three polybenzimidazoles in this series were ascertained by dynamic mechanical analysis to be 438 480 °C.
Besides, the intrinsic particular features of GFRP materials require the application of new techniques of mechanical analysis to define a correct material model.
Additionally, the material was tested using dynamic mechanical analysis to determine the effects of time temperature superposition on the strain rate behavior of the samples.
Changes in total stress generate undrained fluid pressure increments which are passed from the mechanical analysis to the transport logic with a correction to enforce conservation of fluid mass.
This work is aimed at developing a technique for manipulating the data derived from dynamic mechanical analysis to obtain an accurate estimate of the relaxation modulus of a material over a large range of strain rate.
The effects of different amounts of monomer were examined, with NMR to obtain the percent branching, transmission electron microscopy to obtain information on morphology, gel fraction measurement and dynamic mechanical analysis to obtain information on mechanical properties.
