Effect of Shock Wave Treatment on the Properties of Aromatic Thermoplastics

Study of the Effect of Shock-wave Treatment on the Structure and Properties of Phenylone

“…One of the most important indices characterising the process of explosive pressing and the quality of the preforms obtained is their density. It is known [3] that, to prevent excessive heating up of the polymer powder because of its high porosity, and to improve the quality of pressing, before explosive pressing it is necessary to compact the powder to a density of 0.8 Mg/m 3 . The influence of the explosive detonation rate and the associated pressure of the explosion product and impact momentum on the density of Phenylone showed (Figure 1) that the pressed material has practically the theoretical density (1.32-1.33 Mg/m 3 ) after explosive loading with a pressure of 0.5-1.5 GPa.…”

“…Table 2 gives the physicomechanical properties of Phenylone S3 produced by explosive pressing in Figure 6. TMA curves of Phenylone S3 obtained by static (1,3) and explosive (2,4) pressing before sintering (1,2) and after sintering at 360°C (3,4) comparison with the properties of Phenylone S2 produced by hot pressing [1]. From an analysis of the results of testing their properties it can be seen that Phenylone S3 produced by high-speed pressing hardly differs from Phenylone S2 produced by the more labour-intensive and time-consuming method, but in strength and hardness it is superior.…”

“…Dependence of the density(1,2) and microhardness(3) of Phenylone S3 on the sintering temperature in the free state. 1 -specimen thickness 3-4 mm; 2 -specimen thickness 8-10 mm © 2010 Smithers Rapra Technology T/33…”

Properties of Explosion-Treated Polymer Composites

“…Realisation of shock-wave loading of a powder mixture can be carried out by different schemes that differ in shock pulse confi guration, which makes it possible to vary the level of pressure, the heat factor, and the stress state of the substance during explosion treatment. This, in turn, has a considerable infl uence on the structure and mechanical characteristics of polymers and their composites [6][7][8].…”

“…Explosion compaction of polymer powder was carried out by a sliding loading scheme with a pressure of up to 2.0 GPa, eliminating degradation of the polymers. Subsequent sintering of mouldings of 3-5 mm to remove internal stresses and to produce a solid material with a homogeneous structure and the necessary combination of physicomechanical properties was carried out in the free state in the temperature range 340-440°C determined by the heat resistance of the polymers [7].…”