Olefin copolymers (OCP), which have a long, polymer backbone and can be semi-crystalline or amorphous amorphous OCPs have regular branching that prevents crystallisation at low temperatures.They come in various types, with different molecular architectures. VMs are additives made of long, flexible molecules called polymers. By Alison Gaines With today’s focus on low viscosity engine oils as one of the keys to vehicle fuel economy, there’s a renewed focus on viscosity modifier (VM) technology.ĭuring March’s F+L Week 2015 Conference organised by F&L Asia in Singapore, experts from major additive suppliers presented information on how to choose the right VM and how to test them to better understand their benefits in real-world performance.
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