Introduction To Organophosphorus Polymers

In the 1930s, J.A. Alvin of DuPont in the United States started the research on organophosphorus polymers, using bisphenol A to react with phosphorus trichloride to obtain insoluble and infusible products. Since the 1940s, the purpose of studying organophosphorus polymers is mainly to find polymer materials with unique properties, such as flame retardant, high temperature resistance, solvent resistance, low temperature flexibility and UV resistance. It has now been extended to introduce organic groups on the backbone of inorganic phosphorus polymers. For example, the cyclized trimer of dichlorophosphine (NPCl2)3 can be polymerized into a linear polymer at high temperature, and then the chlorine atom is replaced with sodium alkoxide to become a polyalkoxyphosphine polymer: When R is CF3CH2, C3F7CH2 The melting temperature of the polymer is as high as 240°C or more, and it can be used as oil-resistant pipes and gaskets, as well as flame-resistant and shock-proof materials at -60 to 200°C.