Plasticizing and Hydrophobizing Effect of Plant OilBased Acrylic Monomers in Latex Copolymers with Styrene and Methyl Methacrylate

Abstract

Latex nanoparticles from acrylic monomers (made from olive and soybean oil which are significantly different in terms of fatty acid unsaturation amount) were synthesized using miniemulsion copolymerization with styrene and methyl methacrylate. Presence of plant oil-based fragments impacts thermomechanical properties of latex films by decreasing glass transition temperature and creating a plasticizing effect. The thermomechanical properties of resulting latex nanoparticles depend considerably on the amount of incorporated oil-derived fragments. As a result, biobased ingredients make latex copolymers more flexible, improve material film forming properties, and provide flexibility and toughness when compared to the normally rigid polystyrene and poly(methyl methacrylate). In addition, plant oil-based fragments enhance hydrophobicity of the crosslinked latex films and can be considered as additives to reduce water sensitivity of the polymer network.

Evaluation of 3-Allyl-5-vinylveratrole in Latex Copolymerization with an Acrylic Monomer from High Oleic Soybean Oil

“…The POBM library has been recently developed in our group using one-step direct transesterification of a broad variety of plant/vegetable oils. , Previous studies show that POBMs might be advantageously copolymerized with petroleum-based counterparts, including styrene in latex synthesis. Based on our results, up to 70 wt % of POBM can be incorporated into copolymerization with styrene, while maintaining a required high level of latex performance. , Other previous studies indicate promises of plant oil-derived latex copolymers for high-performance coating applications . Replacement of styrene with AVV in copolymerization with POBM will make the monomer feed fully biobased and new latex copolymers almost completely bioderivable.…”

“…The resulting reactive mixture was washed with brine solution, treated with magnesium sulfate, and dried under vacuum. The detailed procedure of the HOSBM synthesis is described elsewhere …”

Polymeric Electrospun Fibrous Dressings for Topical Co-delivery of Acyclovir and Omega-3 Fatty Acids

“…The interactions occurring between ACV and PCL polymer within the fiber can also explain the crystallinity decrease of PCL loaded fibers observed by DSC (Supplementary Table 1) and the Young's modulus decrease observed by tensile stress studies (Table 1), as from these interactions can occur the formation of a complex polymer-drug that decreases the attraction between polymer chains to make them more flexible and more amorphous than the crystalline raw materials (Yu et al, 2010). Similarly, ω3, being an oil incorporated in the polymer matrix, could lead to polymer softening by reducing the forces between the polymer molecules, thereby increasing chain mobility (Demchuk et al, 2018; São José et al, 2019). This also justifies the crystallinity decrease of PCL loaded fibers observed by DSC (Supplementary Table 1) and the Young's modulus decrease observed by tensile stress studies (Table 1).…”

Effect of Fatty Acid Polyunsaturation on Synthesis and Properties of Emulsion Polymers Based on Plant Oil-Based Acrylic Monomers

“…The latter observation shows that the molecular weight of latexes made from a high amount of POBMs can be controlled by varying the polyunsaturation in the plant oil chosen for monomer synthesis. Furthermore, DSC measurements confirm ( Table 3 ) that the variation of polyunsaturation in the oil also affects the thermal properties of the resulted highly biobased latexes by decreasing the glass transition temperature and internal plasticization effect of POBM-based fragments [ 19 ]. Most double bonds in POBM fatty fragments are retained during polymerization ( Figure 2 ) and can be used for the crosslinking of latex films and coatings to form polymer networks [ 9 ].…”

“…Acrylic latexes were synthesized in miniemulsion copolymerization of respective POBM with St. For this purpose, oil phase (15 g) was prepared by mixing of each plant-oil-based monomer (40–60 wt.%, 6–9 g) with St at different ratios (6–9 g) in the presence of 1.5 wt.% (0.225 g) oil-soluble initiator. The detailed latex synthesis procedure and its characterization are described in [ 19 ].…”