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Carboxymethyl cellulose graft copolymer (two)

 Last Update: 2021-11-04
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(2) Carboxymethyl cellulose-acrylic acid (sodium) graft copolymer

The reaction formula of graft copolymerization of carboxymethyl cellulose and acrylic acid (sodium) monomer is:

The preparation of carboxymethyl cellulose acrylic acid (sodium) graft copolymer can be divided into radiation initiation and chemical initiation according to the different initiation methods
.

①Initiated by gamma rays

Weigh 50g of carboxymethyl cellulose, measure a certain amount of deionized water and a certain amount of acrylic acid, mix the three evenly in a triangular flask with a stopper, and finally adjust the mixture to Neutral
.

Immediately after the prepared mixture is placed next to the ⁶⁰ Co radiation source, the graft polymerization reaction is carried out under γ-ray irradiation

②Chemical initiation

Weigh the corresponding mass of acrylic acid (AA) into the container, place the container in a cold water bath, and add alkaline solution to the container to neutralize the acrylic acid.

After the neutralization reaction is completed, add N, N'- Methyl bisacrylamide (MBAM), add an appropriate amount of water

(3) Carboxymethyl cellulose-methacrylic acid graft copolymer

The reaction formula of graft copolymerization of carboxymethyl cellulose and methacrylic acid monomer is:

Was dissolved in 150mL of water to 2g CMC, in N ₂ with stirring under protective 30min, temperature initiator was added CAN-EDTA (15 ~ 45 ℃ when cerium ammonium nitrate , and ethylenediaminetetraacetic acid), the reaction was stirred for 10min after addition of the monomers methyl Acrylic acid (MAA), add 0.
1g N methylol acrylamide (MAM) after a certain period of time, and then react for 15 minutes
.

After cooling, the above substances were precipitated and separated with a mixed solvent of ethanol and water (volume ratio 50:50), and dried to obtain crude grafts.

Related Links: Carboxymethyl Cellulose Graft Copolymer (1)

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