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Diester-based dendrimer-amine macromolecule was functionalized modification by TRIS(77-86-1)

The dendritic polyamide-amine macromolecules were subjected to terminal functionalization in the order of TRIS(77-86-1), acid halide and dithiobenzoic acid to produce dithiobenzoate-terminated branches (PAMAM-DTBA), and analyzed and characterized by infrared spectroscopy and nuclear magnetic resonance spectroscopy. Then, in the tetrahydrofuran, PAMAM-DTBA was used as the polyfunctional chain transfer agent, azobisisopropionitrile (AIBN) as the initiator, acrylamide (AM) and methacryloyloxyethyltrimethylammonium chloride (S-CPAM) was synthesized by reversible addition-fragmentation chain transfer (RAFT) radical polymerization with DMC as a monomer. Their molecular structures were characterized by IR spectroscopy. The optimum reaction conditions were as follows: the reaction temperature was 60 ℃, the reaction time was 24 h, the amount of initiator was 0.15% (mass fraction), the chain transfer agent was the same as that of S-CPAM. The reaction conditions were as follows: reaction temperature 60 ℃, reaction time 24h, The initiator molar ratio was 0.417 and the cationic monomer accounted for 65% of the total monomer (mass fraction). The effect of S-CPAM on the assisted retention of poplar APMP was studied under different application conditions.

 

 

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