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Synthesis of a Block Copolymer-based Fixing Agent and Its Agglomeration Behavior with Dissolved and Colloidal Substances
  
DOI：10.11980/j.issn.0254-508X.2013.05.003
Key Words:RAFT polymerization  fixatives  dissolved and colloidal substances  agglomeration
Fund Project:本课题得到国家自然科学基金项目（31070529）的资助。
Author NameAffiliation
李国栋1 1.天津科技大学天津市制浆造纸重点实验室，天津，300457 
王立军1,2 1.天津科技大学天津市制浆造纸重点实验室，天津，300457；2.浙江科技学院轻化工程系，浙江杭州，310023 
张旖倩1 1.天津科技大学天津市制浆造纸重点实验室，天津，300457 
肖　禾1 1.天津科技大学天津市制浆造纸重点实验室，天津，300457 
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Abstract:A novel block copolymer of acrylamide and dillyldimethyl ammonium chloride (P (AM-b-DADMAC)) was prepared by reversible addition fragmentation chain transfer (RAFT) polymerization and its structural characteristics were analyzed by FT-IR, 1H-NMR and SEC measurements. Turbidimetry and focused beam reflectance measurement (FBRM) were used to investigate its behavior in agglomerating dissolved and colloidal substances (DCS) from the unbleached thermomechanical pulp. The results indicated that P(AM-b-DADMAC) block copolymer with controlled polydispersity index (PDI) and composition could be successfully synthesized in aqueous solution by using RAFT method. The block copolymer was proved to be more effective in the treatment of dissolved substances (DS) and colloidal substances (CS) compared to the PDADMAC homopolymer, due to its unique physical and chemical properties.
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