Influence of temperature on shock compressibility and spall strength of ABS under weak shock waves

The influence of temperature on the strength characteristics of ABS (copolymer of acrylonitrile, butadiene and styrene) under high strain rate is investigated. Spall strength was measured at a maximum compression stress of 0.6 GPa in the initial temperature range of samples 20–115$^\circ$C. An explanation is proposed for the abnormal increase in the value of the spall strength when the glass transition temperature is exceeded based on the analysis of a possible change in the internal structure. The dependences of the shock wave velocity on the particle velocity (Hugoniots) in the range of maximum shock compression stresses from 0.1 GPa to 1.0 GPa at different temperatures are constructed.