Preparation of Linear and Crosslinked Polymer Microspheres by Dispersion Polymerization

Jayachandran, Kizhakkedathu; Chatterji, P. R.

doi:10.1081/mc-100002056

Cited by 38 publications

(17 citation statements)

References 87 publications

(216 reference statements)

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“…A lower concentration of hydrolysed species will slow down nucleation and coagulation processes, and result in an increase of polydispersity [44], as reflected by CV's of 0.06, 0.06, 0.10, and 0.40 for 100, 10, 1, and 0.1 solutions, respectively.…”

Section: Resultsmentioning

confidence: 97%

Fluorescent organosilica micro- and nanoparticles with controllable size

Vogel

Surawski

Littleton

et al. 2007

Journal of Colloid and Interface Science

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Section: Resultsmentioning

confidence: 97%

Fluorescent organosilica micro- and nanoparticles with controllable size

Vogel

Surawski

Littleton

et al. 2007

Journal of Colloid and Interface Science

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“…The initiator BPO has been considered poor for preparation of uniform polymer microspheres by dispersion polymerization. 8 Dispersion polymerization starts in a homogeneous medium of monomers, free-radical initiator, and polymeric stabilizer dissolved in a suitable single solvent or solvent mixture. The initiator decomposes and generates free radicals in the continuous phase when the reaction mixture is heated.…”

Section: Dispersion Polymerization Of Mmamentioning

confidence: 99%

“…Dispersion polymerization has recently received great attention for the preparation of polymer particles on a micrometer scope because of its simplicity and flexibility since the polymerization method was invented over 2 decades ago. 8,9 It is an attractive and promising alternative to other polymerization methods, which affords micrometer-size monodisperse particles in a single-batch process. It is also a newly emerging technique for the preparation of monodisperse polymer particles of different sizes (1-10 lm) in very good yield and is suitable for a variety of monomers.…”

Section: Introductionmentioning

confidence: 99%

Influence of poly(methyl methacrylate) particles with different initial temperature rising ramps on size distribution in dispersion polymerization

Zhang

Wang

2009

J of Applied Polymer Sci

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The initial heating velocity was surprisingly found to play a key role in the size distribution of the resulting polymer particles in the dispersion polymerization of methyl methacrylate. Monodisperse poly(methyl methacrylate) particles had to be prepared by the mild and gradual increase of the reaction temperature. A universal conclusion was drawn from a series of experiments: the more slowly the initial temperature rose, the more the dispersity of the poly(methyl methacrylate) particles improved with a monomer concentration of 5-20 wt %, a 2,2-azobisisobutyronitrile concentration of 0.5-3 wt %, and a polyvinylpyrrolidone K-30 concentration of 20-60 wt %. The optimal heating velocity was 10-15 C/h. A heating ramp faster than 15 C/h led to polydisperse polymer particles or a poor dispersity. These interesting phenomena might be explained as a delicate balance between the formation rate of radicals and the capture of oligomer chains in the continuous phase when a slow heating strategy was used. For comparison, the dispersion polymerization of styrene and glycidyl methacrylate in an alcoholic medium was also investigated. Slow heating was slightly disadvantageous for the dispersity of polystyrene and poly(glycidyl methacrylate). Presetting at the polymerization temperature was practical for the production of monodisperse polystyrene and poly(glycidyl methacrylate). Furthermore, either a low reaction temperature or a long heating time caused the coagulation of poly(glycidyl methacrylate) or polydisperse particles.

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“…There is a variety of methods to synthesize magnetic polymeric spheres like emulsion (16) and multistep swelling polymerization (17), solvent evaporation (18), etc. In contrast to these methods, providing very complex or broad polydispersity index, the dispersion polymerization has been suggested as an alternative method to synthesize micron-sized magnetic particles (19). The most crucial advantage of this method is being simple: It is a single-step technique providing mono-size particles under desired conditions (20).…”

Section: Introductionmentioning

confidence: 99%

Characterization of Magnetic Polymeric Microparticles

Köse¹

2016

J. Turk. Chem. Soc., Sect. A: Chem.

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Abstract:The separation process is very important in a variety of scientific fields, especially in biochemistry and biotechnology. The separation performance of a method can be determined by the separation time and the purity of the separated molecule, which is directly proportional with the ligand chosen for the target molecule. The separation time is actually a very important step for the cost and the time-dependent analysis, especially in medical applications. Magnetic separation is a very advantageous technique because it eliminates the time-consuming sample preparation and centrifugation steps. However, the magnetic performance of adsorbent may not be strong enough to respond the magnetic force applied externally. Therefore, in nanoparticle studies, magnetic performance of nanoparticles is highly important. In this study, the magnetic performance of polymeric microparticles synthesized using different magnetic cores (Fe2O3 & Fe3O4, Fe & Ni, Ni & Co, Fe & Ni & Co) with a solid support, HEMA (2-hydroxyethylmethacrylate), and a functional monomer, AdeM (adenine methacrylate), were compared. Some other properties such as size, zeta potential, surface morphology, etc. were also studied.

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Preparation of Linear and Crosslinked Polymer Microspheres by Dispersion Polymerization

Cited by 38 publications

References 87 publications

Fluorescent organosilica micro- and nanoparticles with controllable size

Fluorescent organosilica micro- and nanoparticles with controllable size

Influence of poly(methyl methacrylate) particles with different initial temperature rising ramps on size distribution in dispersion polymerization

Characterization of Magnetic Polymeric Microparticles

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