Isotropy of mechanical properties and environmental stress crack sensitivity in injection‐ and injection‐compression molding of polystyrene with different mold temperature

In addition to conventional injection-compression molding and injection with dynamic process temperature control, a synergistic combination of both processes has recently been applied in temperature-controlled molding. The two-dimensional holding pressure effect the long maintenance flowability melt due high mold enables particularly large flow path wall thickness ratios. most cases, only optimized microstructures aspect ratios is considered without including changed internal structure such manufactured components. course this investigation, influence different strategies under variation on production-related anisotropies mechanical properties stress crack sensitivity thin-walled polystyrene components was examined. determined are significantly below values given data sheet material adapted variant temperature. However, results also show clear homogenization direction- path-dependent properties. contrast, produced way tend increased environmental sensitivity. This could be attributed reduced orientations as result favorably proceeding orientation relaxation.