Fig. 5From: Porous polymers bearing functional quaternary ammonium salts as efficient solid catalysts for the fixation of CO2 into cyclic carbonatesInfluences of reaction conditions on the cycloaddition of CO2 and ECH over DVB-HTA. a Influence of initial CO2 pressure. b Influence of reaction time. c Influence of reaction temperature. d Influence of catalyst amount. Reaction conditions: catalyst 0.05 g, ECH 16 mmol, CO2 pressure 1.2 MPa, 120 °C, 3 h; for each figure, there is a specific parameter changedBack to article page