Scher’s Equation

Scher’s Equation relates the viscosity of a polymer melt to molecular weight, showing how flow resistance increases as polymer chains become longer. It states that viscosity rises dramatically with increases in molecular weight, following a specific mathematical relationship. In essence, longer chains entangle more tightly, making the material thicker and harder to flow. This equation helps engineers predict how changing polymer chain length will affect processing behavior, enabling better control over manufacturing and product properties.