What is polyphosphate ester?

Polyphosphate esters are a group of polymers that are formed by the condensation of phosphorylated monomers. They have a wide range of applications, including as fire retardants, plasticizers, and as components of lubricants and hydraulic fluids. Polyphosphate esters have high thermal stability and are resistant to chemical degradation, making them useful in many industrial applications. They are also biodegradable, making them a more environmentally friendly alternative to other types of polymers. Additionally, polyphosphate esters have been found to have potential biological applications, including as anti-tumor agents and as biomaterials for tissue engineering.