The optimal temperature and pressure conditions for the synthesis of polyethylene oxide PEO using ethylene oxide EO monomer as the raw material can vary depending on the specific catalyst and initiator system used. However, a general guideline for the synthesis of PEO is as follows:Temperature: The reaction temperature typically ranges from 40C to 100C. Lower temperatures 40-60C are preferred for synthesizing PEO with higher molecular weights, while higher temperatures 60-100C are used for lower molecular weight PEO.Pressure: The pressure is usually kept at atmospheric pressure or slightly above 1-5 bar to maintain a controlled environment and ensure proper mixing of the reactants.It is important to note that the molecular weight of the resulting PEO can be controlled by adjusting the ratio of ethylene oxide monomer to the initiator, as well as the reaction time and temperature. To achieve a specific desired molecular weight, it is recommended to perform a series of experiments with varying conditions and analyze the resulting PEO products to determine the optimal conditions for your specific application.