Morphology of anomalous polystyrene/ polybutyl acrylate composite particles produced by seeded emulsion polymerization

Abstract

Recently, we found that ''golf ball''-like polystyrene (PS)/polybutyl acrylate (PBA) composite particles could be produced by seeded emulsion polymerization of butyl acrylate (BA) with PS seed particles. In this article, the effects of the polymerization temperature, BA monomer concentration, and the presence of 1-octanol, which is a good solvent for PBA and a poor solvent for PS in the polymerization, on the morphology was studied.

Novel Pickering Emulsifiers Based on pH-Responsive Poly(2-(diethylamino)ethyl methacrylate) Latexes

“…In addition, the relatively sharp signal at ~ 3.7 ppm observed in spectra (a) and (b) (see Figure S3; entry 4 in Table 1) can be assigned to the oxyethylene protons of the grafted PEGMA stabilizer. 35,40 As expected, this signal is not present in spectra (c) and (d) recorded…”

“…For example, Song et al had reported similar observations for the alcoholic dispersion polymerization of styrene using the same DVB cross-linker. [40][41][42] Therefore the one-shot batch formulation was repeated in the absence of any cross-linker (see entry 8, Table 1). DLS studies reported an intensity-average diameter of 430 nm for the resulting linear latex, while SEM indicated the formation of welldefined spherical particles, see Figure 2b.…”

Micromolding-polymerization as a novel method for production of nonspherical polymer particles: formation mechanism of polystyrene particles

“…In conventional methods (e.g., emulsion, suspension, or dispersion polymerization), the minimization of the interfacial free energy usually results in spherical particles [1,2], whereas the production of nonspherical particles is preferred thanks to their exceptional properties rather than spherical ones [3]. In the past years, several efforts have been done to prepare such particles using different techniques [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. We also reported the production of particles with a variety of shapes [19][20][21][22][23][24].…”

Preparation of novel and unique nonspherical particles with almond-shell-like shape via dual-seeded dispersion polymerization in the presence of saturated hydrocarbon droplets

“…Minimization of the interfacial energy between the particles and medium resulted in spherical particles which were prepared by emulsion, suspension, and dispersion polymerizations. However, several techniques [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17] have been developed to prepare nonspherical polymer particles among which seeded emulsion and dispersion polymerizations have many advantages compared with others. The preparation of various nonspherical particles with these methods has been reported as follows: "egg-like" [11], "confetti-like" [12], "raspberry-like" [13][14][15], "snowman-like" [12,16], "rugby-ball-like" [17], and so forth.…”