Synthesis and characterization of poly(pentabromostyrene) micrometer-sized particles of narrow size distribution for flame-retardant applications

Bretler, Uriel; Pellach, Michal; Fridman, Natalia; Margel, Shlomo

doi:10.1007/s00396-014-3167-2

Cited by 11 publications

(9 citation statements)

References 33 publications

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“…The procedure leads to gradual growth of the primary particles, up to total consumption of the monomers and radicals. Vinylic monomers are routinely used for preparing organic polymeric NPs because they may contain many possible functional side groups …”

Section: Introductionmentioning

confidence: 99%

Engineering of UV-absorbing polypropylene films containing poly(2-(2′-hydroxy-5′-methacryloxyethylphenyl)-2H-benzotriazole) nanoparticles

Cohen

Kolitz‐Domb

Haham

et al. 2017

Polym. Adv. Technol.

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Ultraviolet‐absorbing nanoparticles (NPs) were prepared by emulsion co‐polymerization of the vinylic monomer 2‐(2′‐hydroxy‐5′‐methacryloxyethylphenyl)‐2H‐benzotriazole (Norbloc™, NB) with the crosslinking monomer divinylbenzene. The effect of total monomer, surfactant, crosslinker, and initiator concentrations on the size and size distribution of the formed NPs was elucidated. The NB monomer and the formed polyNB (PNB) NPs of 19 ± 2 nm were then incorporated into polypropylene (PP) films by melt‐compounding technique by using cast film extrusion. Increasing the PNB NP concentrations integrated within the PP films decreased their UV transmittance. Migration of the UV absorbing PNB NPs from the PP films was not observed during 3 years of storage at room temperature or while exposure to extreme conditions. Under the same conditions, a significant migration was observed for the NB monomer‐containing films. Overall, the PNB NP‐containing films are clear and transparent, although the haze was affected by the addition of NB and PNB NPs. Moreover, the films have good mechanical properties and UV‐blocking quality. Copyright © 2017 John Wiley & Sons, Ltd.

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Section: Introductionmentioning

confidence: 99%

Engineering of UV-absorbing polypropylene films containing poly(2-(2′-hydroxy-5′-methacryloxyethylphenyl)-2H-benzotriazole) nanoparticles

Cohen

Kolitz‐Domb

Haham

et al. 2017

Polym. Adv. Technol.

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“…So, the study to enhance its thermal stability and flame retardancy properties is required and highly demanded. Usually to improve the thermal stability and flame resistance of thermoplastic polymers flame retardant materials have to be used as additives [2,3]. Halogen-based flame retardants were used and these materials were found to be effective for flame retardation; however these materials were inhibited due to their associated environmental pollution [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Nanoparticles Decorated on Resin Particles and Their Flame Retardancy Behavior for Polymer Composites

Attia

Zayed

2017

Journal of Nanomaterials

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New nanocomposites have been developed by doping of amberlite IR120 resin with spherical TiO 2 nanoparticles in the presence of maleate diphosphate. Polystyrene composites of resin, maleate diphosphate, and resin-maleate diphosphate were prepared individually. This is in addition to preparation of polymer nanocomposites of polystyrene-resin doped TiO 2 nanoparticles-maleate diphosphate. The flame retardancy and thermal stability properties of these developed polymer composites were evaluated. The inclusion of resin and resin doped nanoparticles improved the fire retardant behavior of polystyrene composites and enhanced their thermal stability. Synergistic behavior between flame retardant, resin, and nanoparticles was detected. The rate of burning of the polymer nanocomposites was recorded as 10.7 mm/min achieving 77% reduction compared to pure polystyrene (46.5 mm/min). The peak heat release rate (PHRR) of the new polymer composites has reduced achieving 46% reduction compared to blank polymer. The morphology and dispersion of nanoparticles on resin and in polymer nanocomposites were characterized using transmission and scanning electron microscopy, respectively. The flame retardancy and thermal properties were evaluated using UL94 flame chamber, cone tests, and thermogravimetric analysis, respectively.

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“…Dispersion polymerization is a common method for preparing uniform nonporous microparticles in a single step. [10,[17][18][19] In this technique, the monomer, initiator, and surfactant are dissolved in an organicbased continuous phase, forming a homogeneous solution. Initiation of the polymerization process involves reaction of initiator radicals with the desired vinylic monomers.…”

Section: Introductionmentioning

confidence: 99%

Engineering of crosslinked polyisothiouronium methylstyrene microparticles of narrow size distribution for antibacterial applications

Cohen

Laitman

Tennebaum

et al. 2017

Polymers for Advanced Techs

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Isothiouronium salts are well known for their biocidal activity; however, their environmental toxicity is problematic. The current manuscript describes the synthesis of the antibacterial vinylic monomer, isothioronium methylstyrene, as well as its dispersion co‐polymerization with the crosslinking monomer divinylbenzene to form polyisothiouronium methylstyrene (PITMS) micrometer‐sized crosslinked particles of narrow size distribution. The effect of crosslinking monomer, initiator, and stabilizer concentrations on the size and size distribution of the formed microparticles was also elucidated. The incorporation of the isothiouronium salts into microparticles significantly reduces their toxicity. The bactericidal activity of PITMS microspheres of 376 ± 42‐nm diameter was demonstrated against four common bacterial pathogens: Escherichia coli, Pseudomonas aeruginosa, Staphylococcus aureus, and Listeria innocua. The minimum bactericidal concentration of PITMS microparticles needed for total killing was found, and their potent antibacterial activity demonstrates the potential of these particles as new types of antibacterial additives for various industrial and biomedical materials. Copyright © 2017 John Wiley & Sons, Ltd.

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Synthesis and characterization of poly(pentabromostyrene) micrometer-sized particles of narrow size distribution for flame-retardant applications

Cited by 11 publications

References 33 publications

Engineering of UV-absorbing polypropylene films containing poly(2-(2′-hydroxy-5′-methacryloxyethylphenyl)-2H-benzotriazole) nanoparticles

Engineering of UV-absorbing polypropylene films containing poly(2-(2′-hydroxy-5′-methacryloxyethylphenyl)-2H-benzotriazole) nanoparticles

Nanoparticles Decorated on Resin Particles and Their Flame Retardancy Behavior for Polymer Composites

Engineering of crosslinked polyisothiouronium methylstyrene microparticles of narrow size distribution for antibacterial applications

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