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Polymers

Polymers

A polymer is a chemical compound or mixture of compounds consisting of repeating structural units created through a process of polymerization. Viscosity index (VI) is a commonly used method of measuring a fluid’s change of viscosity in relation to temperature. The higher the VI, the smaller the relative change in viscosity with temperature. VI improvers (also known as viscosity modifiers) are additives that increase the viscosity of the fluid throughout its useful temperature range.