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Preparation and Application of Chitosan-AM-DMDAAC Graft Copolymer

MA Yong-sheng

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Abstract

The graft copolymerization of acryamide (AM) and dimethyl diallyl ammonium chloride (DMDAAC) onto chitosan, which was initiated by using cerium ammonium nitrate (CAN) as initiator was studied. The graft copolymer was used as paper dry strengthening agent. The application results showed that the best copolymerization condition was that reaction time at 40℃ was 5 h, dripping time of monomer was 0.5 h, the concentration of CAN was 0.4 mmol/L, m(CS):m(AM):m(DMDAAC)=1∶7.4∶0.48, the pH va lue of reaction system was 1.83, the dosage of NaHSO_3 was 3.00 mmol/L. The breaking length and tear index of paper was respectively increasedby 1460m and 15.5% for NBKP when the dosage of the graft copolymer was 0.6%. The strengthening effect of this copolymer was much better than that of the unmodified chitosan.

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What this paper is about

The graft copolymerization of acryamide (AM) and dimethyl diallyl ammonium chloride (DMDAAC) onto chitosan, which was initiated by using cerium ammonium nitrate (CAN) as initiator was studied. The graft copolymer was used as paper dry strengthening agent. The application results showed that the best copolymerization condition was that reaction time at 40℃ was 5 h, dripping time of monomer was 0.5 h, the concentration of CAN was 0.4 mmol/L, m(CS):m(AM):m(DMDAAC)=1∶7.4∶0.48, the pH va lue of reaction system was 1.83, the dosage of NaHSO_3 was 3.00 mmol/L. The breaking length and tear index of paper was respectively increasedby 1460m and 15.5% for NBKP when the dosage of the graft copolymer was 0.6%. The strengthening effect of this copolymer was much better than that of the unmodified chitosan.

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Available abstract

The graft copolymerization of acryamide (AM) and dimethyl diallyl ammonium chloride (DMDAAC) onto chitosan, which was initiated by using cerium ammonium nitrate (CAN) as initiator was studied. The graft copolymer was used as paper dry strengthening agent. The application results showed that the best copolymerization condition was that reaction time at 40℃ was 5 h, dripping time of monomer was 0.5 h, the concentration of CAN was 0.4 mmol/L, m(CS):m(AM):m(DMDAAC)=1∶7.4∶0.48, the pH va lue of reaction system was 1.83, the dosage of NaHSO_3 was 3.00 mmol/L. The breaking length and tear index of paper was respectively increasedby 1460m and 15.5% for NBKP when the dosage of the graft copolymer was 0.6%. The strengthening effect of this copolymer was much better than that of the unmodified chitosan.

Key concepts: Copolymer, Chitosan, Monomer, Cerium, Ceric ammonium nitrate, Cerium nitrate, Chemistry, Polymer chemistry

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