Preparation and Purification of a Flame-Retardant Polyphenylphosphonate Containing 4,4'-Dihydroxybenzophenone

: pp. 95–102
Federal Institute of Education, Science and Technology of Santa Catarina (IFSC)
Chemical Engineering Department, Federal University of Santa Catarina (UFSC)
Federal Institute of Education, Science and Technology of Santa Catarina (IFSC)
Chemical Engineering Department, Federal University of Santa Catarina (UFSC)
Federal Institute of Education, Science and Technology of Santa Catarina (IFSC)
Chemical Engineering Department, Federal University of Santa Catarina (UFSC)
Chemical Engineering Department, Federal University of Santa Catarina (UFSC)

A polyphenylphosphonate containing 4,4'-dihydroxybenzophenone was synthesized as a flame retardant. However, impurities were detected and may compromise its properties and thermal stability. Thus, a purification route based on water and hexane extraction with reflux was proposed. Results showed success in removing impurities, especially P–Cl groups, without damaging the polymer.

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