Meisterprüfung Kunststoffverarbeitung Practice Questions - Österreichische Meisterprüfung Für Das Handwerk Der Kunststoffverarbeiter Exam

Residual moisture causes hydrolytic chain scission at melt temperatures, leading to molecular weight reduction and brittleness; post-molding moisture absorption acts as a plasticizer, increasing impact toughness while reducing stiffness and yield strength Moisture causes immediate crosslinking into an insoluble thermoset inside the barrel; post-molding moisture increases stiffness and tensile modulus Residual moisture increases melt viscosity causing severe short shots; post-molding moisture absorption permanently bleaches the polymer color Water causes severe thermal runaway and explosive decomposition; absorbed moisture causes irreversible shrinkage and chemical cracking