Suspension polymerization
In a typical experiment, lignin (22.5 g) was dissolvedin 25 mL of a sodium hydroxide solution (2 molL1), the solution (47 wt % of lignin) was stirred for30 min at 50C to ensure complete dissolution. Aspecially designed, three-necked, 1-Liter parallel-sideflanged suspension reactor equipped with a doubleblade stirrer9was charged with the continuous