【Key words】 refined alkali lignin; modified alkali lignin; rigid polyurethane foam; mechanical property; aging resistance
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Hydroxyl values of straw alkali lignin and modified lignin resin were determined by potentiometric titration in suitable composite acylation system.
选用合适的复合酰化体系,通过电位滴定,测定了工业碱木质素及其改性树脂的羟值。
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