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    Home > Chemicals Industry > Chemical Technology > Preparation method of polymethacryloxyethyl trimethylammonium chloride and polydimethylaminoethyl methacrylate (PDMAEMA)

    Preparation method of polymethacryloxyethyl trimethylammonium chloride and polydimethylaminoethyl methacrylate (PDMAEMA)

    • Last Update: 2021-10-21
    • Source: Internet
    • Author: User
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    Polymethacryloxyethyl trimethyl ammonium chloride

    Polymethacryloxyethyltrimethylammonium chloride is a water-soluble cationic polymer with special functions, which is widely used in many fields such as petroleum exploration, papermaking, and water treatment
    .


    The preparation of polymethacryloxyethyltrimethylammonium chloride adopts aqueous solution polymerization, and the specific process for preparing a 40% polymethacryloxyethyltrimethylammonium chloride solution is as follows: in the reactor 160 parts of 75% methacryloxyethyl trimethylammonium chloride monomer solution, plus 140 parts of deionized water and 0.


    Zhang Guangguang et al.
    also used aqueous solution polymerization to prepare polymethacryloxyethyltrimethylammonium chloride, and studied the effects of monomer purity, monomer mass concentration, polymerization temperature, and initiator dosage on polymer molecular weight
    .


    When the monomer mass concentration is 70%, the reaction temperature is 65°C, and the amount of azobisisobutyronitrile is 0.


    Polydimethylaminoethyl methacrylate (PDMAEMA)

    The structure of polydimethylaminoethyl methacrylate (PDMAEMA) contains both hydrophilic amino groups, carbonyl groups and hydrophobic alkyl groups.


    [Structural formula]

    [Preparation method] The preparation of polydimethylaminoethyl methacrylate can adopt two methods: aqueous solution polymerization and suspension polymerization


    (1) Suspension polymerization

    ① Monomer preparation of dimethylaminoethyl methacrylate monomer is generally composed of methyl methacrylate (volatile liquid) and 2-dimethylaminoethanol, in the presence of lithium, lithium oxide, lithium acetylacetonate or Bu 2 Sn( OOCMe) 2 is prepared by transesterification in the presence of OOCMe) 2


    ②Polymerization method dimethylaminoethyl methacrylate monomer is added by 200 parts of deionized water, 0.


    (2) Aqueous solution polymerization

    Hu Hui and Fan Xiaodong use ultraviolet light to initiate solution polymerization of dimethylaminoethyl methacrylate to prepare PDMAEMA.


    They studied the effects of the initiator benzoin ethyl ether (BE) dosage, monomer concentration, photoinitiation time and other factors on the polymerization rate, yield and relative molecular weight, and determined the best process conditions for photoinitiated radical polymerization of DMAEMA As follows: the mass concentration of DMAEMA monomer is 0.


    Related links: Polydimethyldiallylammonium chloride (PDMDAAC) physical and chemical properties and preparation methods (2)

     

     

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