Before revision: Poly(p-phenylene oxide) (PPO), poly(p-phenylene ether) (PPE), often referred to simply as polyphenylene oxide, is a high-temperature thermoplastic .
After revision: poly(oxy-2,6-dimethyl-1,4-phenylene),with the general formula (C8H8O)nPoly(p-phenylene oxide) (PPO), poly(p-phenylene ether) (PPE), often referred to simply as polyphenylene oxide, is a high-temperature thermoplastic .