Chemical resistance of core-shell particles (PS/PMMA) polymerized by seeded suspension

Ribeiro, Luiz Fernando Belchior; Gonçalves, Odinei Hess; Marangoni, Cintia; Motz, Günter; Machado, Ricardo Antônio Francisco

doi:10.1590/0104-1428.13216

Cited by 3 publications

(5 citation statements)

References 10 publications

(14 reference statements)

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“…In this study, the increase of the swelling time resulted in higher incorporations of PMMA and thicker shells 16 . Ribeiro et al (2017) produced similar CS particles through seeded suspension polymerizations, showing that the styrene (Sty) conversions of the PS core affected the final polymer properties and that the use of PS seeds with lower Sty conversion allowed the production of higher amounts of poly(styrene‐co‐MMA) chains, as it might be expected 29 …”

Section: Introductionsupporting

confidence: 60%

“…16 Ribeiro et al (2017) produced similar CS particles through seeded suspension polymerizations, showing that the styrene (Sty) conversions of the PS core affected the final polymer properties and that the use of PS seeds with lower Sty conversion allowed the production of higher amounts of poly(styrene-co-MMA) chains, as it might be expected. 29 Some works in the literature have used monomers such as Sty in seeded suspension polymerization reactions to produce particles with CS morphology, 27,30,31 and in studies that reported the use of PAN, it appears on the surface of the structure due to its contribution of functionality to add and form new chemical groups in the shell of the structure. [32][33][34] Although these polymers (PP, PS, and PAN) have already been used to produce CS structures, their combination in the same structured CS particles has not been described in the open literature yet.…”

Section: Introductionmentioning

confidence: 75%

“…In the case of the AN dispersion polymerization, an aqueous phase soluble initiator (KPS) was added due to the high solubility of AN in water. Ascorbic acid was used to prevent the inhibition of free‐radical reactions caused by oxygen, and sodium chloride was used to decrease the solubility of monomer in water 28,29,38 . The conditions and chemicals used in each process are listed in Table 1.…”

Section: Methodsmentioning

confidence: 99%

“…Ascorbic acid was used to prevent the inhibition of free-radical reactions caused by oxygen, and sodium chloride was used to decrease the solubility of monomer in water. 28,29,38 The conditions and chemicals used in each process are listed in Table 1.…”

Section: Pan Shell Preparation Through Seeded Dispersion Polymerizationmentioning

confidence: 99%

See 3 more Smart Citations

Preparation of functionalizable poly(propylene–styrene)/polyacrylonitrile millimeter‐scale particles with core‐shell morphology

Gurgel,

Henriques,

Conradi

et al. 2024

J of Applied Polymer Sci

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Core‐Shell (CS) polymeric particles have attracted great interest due to their high mechanical, thermal, and chemical stability and their surface properties. In this study, functionalizable CS poly(propylene/styrene)/poly(acrylonitrile) (PP/PS/PAN) particles were prepared through heterogeneous polymerizations in a batch reactor. Commercial PP particles and PP/PS particles (prepared by seeded suspension polymerization of styrene (Sty) on PP spheres) were applied as core components of the final structure, while the shell was prepared through acrylonitrile dispersion polymerization. The degree of swelling of the core particles by Sty played an important role for the adhesion of the PAN shell, which for PP particles was 24 wt%, whereas for PP/PS hybrid particles it was 57 wt%. The particles (PP/PS and CS) were characterized through image analysis, revealing a uniform and smooth surface for PP/PS spheres and a uniform porous shell for CS particles. Particle size distributions, thermal degradation, chemical structures, degrees of crystallinity, and textural properties were also evaluated. The PAN shell adhered to the PP/PS particles without forming a copolymer, and the CS particles formed by a PP/PS core and PAN shell had sizes of 4.54 ± 1.24 mm, specific area of 2.70 m2g−1 and PAN content of 15.98 ± 0.82% (m/m) of total particles.

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Section: Introductionsupporting

confidence: 60%

Section: Introductionmentioning

confidence: 75%

Section: Methodsmentioning

confidence: 99%

Section: Pan Shell Preparation Through Seeded Dispersion Polymerizationmentioning

confidence: 99%

See 2 more Smart Citations

Preparation of functionalizable poly(propylene–styrene)/polyacrylonitrile millimeter‐scale particles with core‐shell morphology

Gurgel,

Henriques,

Conradi

et al. 2024

J of Applied Polymer Sci

Self Cite

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“…Ribeiro et al [6] produced core-shell particles by seeded suspension polymerization by using polystyrene (PS) as polymer core, or seed, and methyl methacrylate (MMA) as the shell forming monomer. The TEM measurements revealed that the core-shell morphology consisted of PMMA clusters dispersed in the PS matrix.…”

Section: Introductionmentioning

confidence: 99%

Core-shell magnetic particles obtained by seeded suspension polymerization of acrylic monomers

et al. 2018

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Core-shell magnetic polymer particles were synthesized by seeded suspension polymerization. The core was made of poly(methyl methacrylate-co-divinylbenzene) and a mixture of magnetite, maghemite and goethite (P(MMA-co-DVB)-M). The shell was composed of poly(glycidyl methacrylate-co-divinylbenzene) (P(GMA-co-DVB)). These particles were characterized by infrared spectrometry (FTIR), thermal analysis (TG), scanning electron microscopy (SEM), dynamic light scattering (DLS) and vibrating sample magnetometry (VSM). The results showed the formation of core-shells with good magnetic properties (≈7.1 emu/g) and good thermal resistance (≈300 ºC). The light scattering experiments showed that the particle size of these materials changed from 5-90 microns (core) to 5-120 microns (core-shell). Scanning electron microscopic images were useful to show the formation of P(GMA-co-DVB) shells on P(MMA-co-DVB)-M cores. The materials synthesized in this work have potential to be modified and employed in magnetic separation processes in the biotech and environmental fields.

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Multi-objective dynamic optimization of seeded suspension polymerization process

Jayaweera

Narayana

2021

Chemical Engineering Journal

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Chemical resistance of core-shell particles (PS/PMMA) polymerized by seeded suspension

Cited by 3 publications

References 10 publications

Preparation of functionalizable poly(propylene–styrene)/polyacrylonitrile millimeter‐scale particles with core‐shell morphology

Preparation of functionalizable poly(propylene–styrene)/polyacrylonitrile millimeter‐scale particles with core‐shell morphology

Core-shell magnetic particles obtained by seeded suspension polymerization of acrylic monomers

Multi-objective dynamic optimization of seeded suspension polymerization process

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