Lignin obtained from desulfonation of black liquor, had high purity, high molecular weighty good-heat stability and plasticity through the analyses of IR spectrum, GPC, TG-DSC and Torque curve.

• 红外光谱、凝胶色谱、差热和流变特性分析结果表明，脱磺处理的木质素具有纯度高、分子量大、热稳定性和塑化性好等特点。