【Key words】 2; 3-epoxypropyltrimethyl ammonium chloride; thermomechanical pulp; surface charge density; paper properties; fines retention
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随着淀粉磷酸酯中结合磷的提高，造纸添加剂对填料的留着和对细小纤维的留着作用均增大。
With the increase of combined phosphorus of starch phosphate ester, the retention of paper additive would increase to all of filling and fibril.
结果表明，机械浆中DCS特别是溶解物质DS能够明显降低阳离子聚丙烯酰胺的助留效果，随着DCS浓度的增加，细小纤维的留着率降低。
The results showed that DCS especially dissolved substances(DS) was deleterious to the efficiency of CPAM, and the retention of fine decreased with the increase of concentration of DCS.
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