Investigations on the correlation between particle velocity distribution and PMMA heating effect induced by high-intensity focused ultrasound

High-intensity focused ultrasound (HIFU) is increasingly getting in focus of interest for polymer layer joining (Liebler 2008). Previous studies investigated the heating effect in polymer materials induced by HIFU with liquid sound conductor (Bo Liu et al. 2013) and with solid sound conductor (Oehm et al. 2016). An improved understanding of the physical mechanisms of HIFU to heat thin polymer layers, particularly the correlation between sample heating and particle velocities at the top of the solid sound conductor, is essential to advance polymer processing, where liquids are prohibited.