Acrylamide-methyl methacrylate-acrylic acid terpolymer

[Preparation method] The author and members of the research team used acrylamide , methyl methacrylate and acrylic acid as raw materials to prepare acrylamide-methyl methacrylate-acrylic acid copolymer emulsion by inverse emulsion polymerization.

The preparation process is as follows: the prepared composite emulsifier (HLB value 7.

There are many factors that affect the performance of acrylamide-methyl methacrylate acrylic terpolymer emulsion, mainly including monomer molar ratio, initiator type and dosage, emulsifier type and dosage, reaction time, stirring speed, and oil-water volume ratio

(1) Monomer molar ratio The molar ratio of acrylamide (AM), methyl methacrylate (MMA) and acrylic acid (AA) monomers has a great influence on the relative molecular weight of the terpolymer.

Table 3-16 The influence of monomer molar ratio on the relative molecular weight of copolymer

(2) The type and amount of initiator In the inverse emulsion polymerization reaction, the type of initiator is one of the key factors affecting the relative molecular weight of the copolymer emulsion

Table 3-17 The influence of the type of initiator

Increasing the amount of initiator can not only increase the monomer conversion rate, but also make the polymerization reaction proceed at a faster speed

(3) Emulsifier dosage The HLB value of the composite emulsifier is controlled at about 7.

Table 3-18 The effect of the amount of emulsifier on the performance of the emulsion