Synthesis of Poly(acrylic acid-co-acetoacetoxy ethylmethacylate) via Precipitation Polymerization: Effects of Crosslinker (1,6-diaminohexane) and Post-curing on Microgel Properties

Document Type : Research Paper

Authors

1 Department of Adhesive and Resin, Faculty of Petrochemistry, Iran Polymer and Petrochemical Institute,, Tehran, 1497713115, Iran

2 Department of Adhesive and Resin, Faculty of Petrochemistry, Iran Polymer and Petrochemical Institute, Tehran, 1497713115, Iran

3 IPPI

4 Department of Process control and Modelling, Faculty of Petrochemistry, Iran Polymer and Petrochemical Institute, Tehran, 1497713115, Iran

Abstract

Hypothesis: 1,6-Diaminohexane was utilized as a crosslinker in the synthesis of acrylic acid-co-acetoacetoxy ethylmethacrylate (AA-co-AAEM) microgel prepared by precipitation polymerization. First, the optimum monomer ratio was assessed. Second, the effects of crosslinker concentration and post-cure stage time on microgel properties were evaluated through different experiments.
Methods: The optimum monomers ratio was evaluated using the gel viscosity of the final products . FTIR spectroscopy was used as a criterion of the success of copolymerization reaction. The effects of crosslinker concentration and post-cure time on the microgels’ properties (i.e., swelling capacity, gel content, apparent viscosity rotational viscosity, rheological properties, and glass transition temperature) were investigated
Findings: The copolymer with a monomer ratio of AA:AAEM 95:5 showed the highest viscosity value and chosen as the optimum sample. The experimental results showed that by increasing the crosslinker concentration to 0.05g and the post-cure time up to 2 h, the swelling capacity, apparent and rotational viscosity, storage modulus loss modulus and glass transition temperature increased due to the increase in the sol content. However, increasing the crosslinker content beyond 0.05 g demonstrated diminishing the above properties due to severe crosslinking. Overall, the results revealed a new class of microgels with promising high performance in cosmetic and health products.

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