Abstract
Bleached wood pulp fibers grafted with polyacrylamide (PAM) was synthesized through surface-initiated atom transfer radical polymerization (SI-ATRP) to be applied in papermaking. The ATRP macroinitiator was prepared by esterification of hydroxyl groups of wood fibers with α-bromoisobutyryl bromide (α-BIBB). The bromine atoms on the surface of the macroinitiator were characterized and calculated by FT-IR, EDXS and TGA techniques. The ATRP grafting reaction conditions of fiber-PMA were discussed and determined. To optimize the polymerization in the CuBr/PMDETA catalytic system, several influencing factors on grafting yield were investigated, including solvent, reaction temperature, monomer concentration and sacrificial initiator. The PAM grafted fibers were characterized by FT-IR and TGA analyses.
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