Thermomechanical analysis data reporting

It is possible to measure the order-order (To o) or order-disorder (Tq-d) temperatures by using thermomechanical analysis [29, 31-33]. The thermomechanical analysis data (2°C min and 1 rad s ) reported in Fig. 16.7 shows that the two temperatures (To o=140°C and To d = 175°C) are similar for the pure diblock and the [SIS-SI] blend with SI=85%. This point shows that the behavior of the diblock copolymer is really a key parameter for the [SlS-Sl] blends with high diblock content, by controlling their behavior at low frequencies. As far as the tetrablock copolymers are concerned, it seems on the contrary that there is no lower limit to the level of the secondary plateau. As Fig. 16.5 indeed demonstrates, the level of the secondary plateau for tetrablock materials follows the same power law variation even at high diblock contents. 

Micro-thermal analysis (pTA ) micro-modulated differential thermal analysis (pMDTA ) and micro-thermomechanical analysis (pTMA M) are registered trade marks of TA Instruments Inc. For the time being little work has been reported using such instruments [12] and the calorimetric data are non-quantitative, so that results from pTA should be interpreted with caution. 

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