中文摘要：

采用多种分析手段对杨木CTMP及其碱性H2O2漂白后浆水体系中的溶解与胶体物质的特性进行了分析。结果表明，两种浆中的DS分别占各自DCS的80％和95．7％。DS的阳离子需求量分别占各自DCS阳离子需求量的84％和87％，而且BCTMP的DCS阳离子需求量约为CTMP的4．4倍。CTMP经碱性H202漂白后，有更多的木素溶出，BCTMP的DS中木素含量占其DCS中木素的87％。杨木CTMP的DCS中碳水化合物主要含有木糖、葡萄糖和半乳糖醛酸；碱性H2O2漂白导致较多的葡萄糖醛酸和甘露糖的溶出。DCS的MTBE抽出物中主要含有各种脂肪酸。

英文摘要：

The characteristics of dissolved and colloidal substances released from Poplar CTMP and BCTMP were analyzed using different methods. The results showed that the contents of DS（ dissolved substances） from CTMP and BCTMP account for about 80% and 95.7% of their DCS respectively. The cationic demands of DS account for about 84% and 87% of DCS respectively, and the cationic demand of BCT- MP DCS is 4.4 times higher than that of CTMP. The alkaline hydrogen peroxide bleaching leads to the release of more dissolved lignin, glu- curonic acids and mannans. The extractives of DCS with methyl tert butyl ester （MTBE） mainly consist of different fatty acids.