The optimal temperature and catalyst for the synthesis of polyethylene oxide PEO from ethylene oxide EO monomer are typically in the range of 100-200C and an alkaline catalyst, such as potassium hydroxide KOH or sodium hydroxide NaOH .The temperature and catalyst used in the synthesis process can significantly affect the yield and properties of the resulting PEO polymer. Higher temperatures can lead to faster reaction rates and higher molecular weight polymers. However, if the temperature is too high, it can cause side reactions and degradation of the polymer, leading to lower yields and undesirable properties.The choice of catalyst also plays a crucial role in the synthesis process. Alkaline catalysts, such as KOH and NaOH, are commonly used due to their high activity and selectivity towards the desired PEO polymer. The catalyst concentration can influence the molecular weight and polydispersity of the resulting polymer. Higher catalyst concentrations can lead to lower molecular weight polymers with broader polydispersity, while lower catalyst concentrations can result in higher molecular weight polymers with narrower polydispersity.In summary, the optimal temperature and catalyst for the synthesis of PEO from EO monomer should be carefully selected to achieve the desired yield and properties of the resulting polymer. A temperature range of 100-200C and an alkaline catalyst like KOH or NaOH are generally recommended for this process.