Sodium acrylate-methacryloxyethyl trimethylammonium chloride copolymer

Sodium acrylate-methacryloxyethyl trimethylammonium chloride copolymer

[Preparation method] Sodium acrylate-methacryloxyethyltrimethylammonium chloride copolymer is mainly made of sodium acrylate monomer and methacryloxyethyltrimethylammonium chloride monomer through aqueous solution polymerization.
, The reaction formula is:

The preparation method of the sodium acrylate-methacryloxyethyltrimethylammonium chloride copolymer mainly adopts the aqueous solution polymerization method.
According to the different initiation system, it can be divided into chemical initiation and radiation initiation

(1) Chemically induced preparation method

Add deionized water, chelating agent, chain transfer agent and acrylic monomer into the reaction kettle, and add 50% sodium hydroxide aqueous solution to adjust the pH of the system to 7-9, and then add methacryloyloxy ethyl Trimethylammonium chloride monomer, 30min after nitrogen removal and oxygen removal, add initiator [such as 2,2'-azobis-(N,N-2-amidinopropane) dihydrochloride, etc.
], After initiating polymerization reaction at 15～35℃ for 3～6h, the sodium acrylate-methacryloxyethyltrimethylammonium chloride copolymer is obtained
.
The molar ratio of acrylic acid to methacryloxyethyl trimethylammonium chloride is (3-5):1

(2) Radiation-induced preparation method

Add a certain amount of acrylic acid monomer (AA), distilled water, sodium hydroxide (to neutralize acrylic acid monomer, neutralization degree is 0.
8) and methacryloxyethyl trimethylammonium chloride monomer in sequence in the radiation bottle , Stir uniformly, plug it tightly with a rubber stopper, deoxidize with N _{2 for} 20 minutes, and place it in the cobalt source radiation field for radiation.
The total dose is 3000Gy, the dose rate is 50Gy/min, and the residual monomers are removed after radiation to obtain sodium acrylate-formaldehyde.
Acryloyloxyethyl trimethylammonium chloride copolymer
.
Among them, the molar ratio of methacryloxyethyltrimethylammonium chloride to acrylic acid is (3-6):1

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