The optimum temperature and pressure conditions for the efficient synthesis of polyvinyl chloride PVC from vinyl chloride monomer VCM are as follows:Temperature: The polymerization of VCM to PVC is an exothermic reaction. The optimum temperature for this process is typically in the range of 40-60C 104-140F . This temperature range allows for a controlled reaction rate and minimizes the risk of thermal degradation of the polymer.Pressure: The polymerization of VCM to PVC can be carried out under various pressure conditions, depending on the desired properties of the final product. For suspension polymerization, the pressure is typically maintained at around 10-20 bar 145-290 psi . For bulk or mass polymerization, the pressure can be higher, in the range of 20-50 bar 290-725 psi . Emulsion and micro-suspension polymerization processes may also be carried out at pressures similar to suspension polymerization.It is important to note that the specific temperature and pressure conditions may vary depending on the catalyst system used and the desired properties of the final PVC product. Therefore, it is essential to optimize the reaction conditions for each specific process.