Industrial lignosulfonate LS was modified to graft carboxy by the free radical copolymerization reaction.The structure of modified lignosulfonate LSA was characterized by the infrared spectrogram.

• 以工业木质素磺酸盐LS为原料,采用自由基共聚反应对LS进行接枝羧基改性,制备得到改性磺化木质素LSA,用红外光谱对其结构进行表征。