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A preliminary study of oligomers the monomer DMDAAC AM copolymerization impact

Author: HanXiaoMin
Tutor: ZhangYueJun
School: Nanjing University of Technology and Engineering
Course: Applied Chemistry
Keywords: Dimethyl diallyl ammonium chloride Acrylamide Oligomers Copolymerization Intrinsic viscosity
CLC: O631.5
Type: Master's thesis
Year: 2009
Downloads: 82
Quote: 1
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Abstract


This paper studies the dimethyl diallyl ammonium chloride ( DMDAAC ) oligomers in the monomer solution synthetic cationic degree of 10 % , 30 % PDA polymerization . Classification method , stepwise dissolved in acetone - distilled water mixed solvent , oligomers were graded . The basis of the laboratory 's existing two-step prepared of high purity DMDAAC monomer as monomer polymerization product of intrinsic viscosity and total residual double bonds as markers , selected 10% and 30% synthetic cationic degree PDA the basis under polymerization conditions , was added in the reaction system of the type characterized in the viscosity of the oligomer , Research different quality Score copolymerization of the polymerization reaction and the polymerization reaction product of dimethyl diallyl ammonium chloride and acrylamide (AM) matter ( PDA ) characteristic viscosity of law . The results showed that : in the synthesis of 30 % of a cationic degree PDA during the polymerization reaction , the added characteristic viscosity of at least 0.10 dL / g , mass fraction of 0.18 dl / g and 0.53 dL / g and 0.94 dL / g oligomer fraction from 0 to 100% , characterized in viscosity of the polymerization reaction product of PDA were decreased from 11.0 dL / g to 4.44 dL / g and 5.02 dL / g and 6.18 dL / g and 6.86 dL / g ; polymerization in the synthesis of 10 % of a cationic degree PDA the course of the reaction , the added characteristic viscosity of at least 0.10 dL / g , 0.20 dl / g , mass fraction of 0.34 dL / g and 0.94 dL / g oligomer fraction from 0 to 100% , the polymerization reaction product of PDA the characteristic viscosity of 19.0 dL / g , respectively, decreased to 6.68 dL / g to 7.20 dL / g and 7.42 dL / g and 7.72 dL / g . Thus , the polymerization causes the polymerization reaction product characterized in the presence of the oligomer in the reaction to reduce the viscosity , thus reducing or avoiding the generation of the oligomer in the monomer solution , there will be conducive to the preparation of high relative molecular mass of the copolymer PDA .

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CLC: > Mathematical sciences and chemical > Chemistry > Polymer chemistry ( polymer ) > Polymer physics and physical chemistry of polymers > Polymerization,polycondensation reaction
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