Synthesis condition of response surface methodology to optimize supercritical C02 tackifier.

Using ammonia terminated polydimethylsiloxane - methoxy polyethylene glycol acrylate - and vinyl acetate as raw materials - sufficient CO2 friendly groups are introduced to increase the solubility of the thickener in CO2. A CO2 thickener with easy solubility - environmental protection - low cost and good thick¬ening effect is developed - achieving CO2 viscosity increase under solvent-free conditions. The synthesis process conditions of supercritical CO2 tackifier were optimized using response surface methodology. The results showed that the optimal synthesis conditions were as follows: the addition of ammonia terminated polydimethylsiloxane was 50 g - the addition of methoxy polyethylene glycol acrylate was 27 g - the addition of vinyl acetate was 41 g-the reaction temperature was 75 °C - and the reaction time was 8 h. At a tempera¬ture of 35 °C and a pressure of 8 MPa-the CO2 liquid viscosity of the 2 supercritical CO2 tackifier in¬creased by 50.46 -53. 17 times-which is close to the predicted value of 52.085 times by the model. [ABSTRACT FROM AUTHOR]