Acetic anhydride/perchloric acid/acetic acetate method and acetic anhydride/pyridine method were used to get the result.

• 采用乙酸酐/吡啶回流法和乙酸酐/高氯酸/乙酸乙酯常温酰化法,分别测定了废聚醋醇解产物的羟值。