Formation of highly monodispersed emulsifier-free cationic poly(methylstyrene) latex particles

Xu, Jianjun; Li, Pei; Wu, Chi

doi:10.1002/(sici)1099-0518(19990701)37:13<2069::aid-pola21>3.0.co;2-7

Cited by 31 publications

(31 citation statements)

References 18 publications

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“…1.5) describes polymerization of methylstyrene (vinyl toluene) initiated with 2,2'-azobis(2-amidinopropane)dihydrochloride. Basically these authors [138] confirmed the relations obtained from Goodwin et al for styrene as monomer [135] regarding the dependence of the average particle size on initiator concentration and total ionic strength. Moreover, Wu et al [138] also observed that the stirrer speed influenced the particle size distribution in such a way that at 250 and 350 rpm polydisperse and monodisperse particle size distributions were observed, respectively.…”

Section: Some Practical Examples ± Surfactant-free Emulsion Polymerizsupporting

confidence: 86%

Latex Particles

Tauer¹

2003

Colloids and Colloid Assemblies

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Section: Some Practical Examples ± Surfactant-free Emulsion Polymerizsupporting

confidence: 86%

Latex Particles

Tauer¹

2003

Colloids and Colloid Assemblies

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“…The PS size can be controlled from 120 to 380 nm by changing the initiator concentration from 1.2 to 38 mM. It is known that the dependence of the final particle size on the initiator concentration is classified into two cases: 11 the case in which the particle size decreases with increasing anionic or neutral initiator concentration, 12,13 and the case in which the particle size shows the reverse trend with increasing cationic initiator concentration. 14,15 The former mechanism is easily understandable, because a large number of nuclei are formed at the initial stage so that the final particle size becomes small for a given amount of monomer.…”

Section: Resultsmentioning

confidence: 99%

Controlling Size and Distribution for Nano-sized Polystyrene Spheres

Yun¹,

Lee²,

Jang³

et al. 2010

Bulletin of the Korean Chemical Society

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Highly monodisperse polystyrene (PS) nanospheres were fabricated by surfactant-free emulsion polymerization in water using styrene, 2,2'-azobis(2-methyl propionamidine) dihydrochloride (AIBA), and poly(vinyl pyrrolidone) (PVP). The size and distribution of the PS nanospheres were systematically investigated in terms of initiator concentration, stabilizer concentration, reaction temperature, reaction time, and reactant concentration. With increasing AIBA initiator concentration, PS particle sizes are raised proportionally, and can be controlled from 120 to 380 nm. Particle sizes were reduced with increasing PVP concentration. This decrease occurs because a high PVP concentration leads to a large number of primary nuclei in the early stage of polymerization. When the reaction temperature increased, the sizes of the PS particles decrease slightly. The particles grew quickly during the initial reaction stage (1-3 h) and the growth rate became steady-state after 6 h. The PS sizes approximately doubled when the reactant (styrene, PVP, azo-initiator) concentrations were increased by a factor of eight.

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“…A 6 ml styrene monomer, 75 ml acetone, 75 ml doubly distilled water, and 0.07 g V-50 (2,2-azobis-(isobutyramidine)dihydrochloride) initiator of polymerization were blended together in an autoclave, stirred for 10 min, and then cured for 6 h at 90 C. 28 The size of the PSNS was determined for approximately 65 nm of the most probable diameter with a 20 nm half-peak width of distribution.…”

Section: Assembling Of Psns/pss Layermentioning

confidence: 99%

“…In this study, the positive charged PS nano-sphere (PSNS) has been solvothermal synthesized 28 and was self-assembly modified 29 onto a PDMS microchannel to obtain a quasi-ordered PSNS monolayer. Followed by driving through the PSS solution, the final PSNS/PSS modified layer was built on channel surface and the surface properties were characterized by EOF, contact angle.…”

Section: Introductionmentioning

confidence: 99%

Electrophoretic separation of neurotransmitters on a polystyrene nano-sphere/polystyrene sulphonate coated poly(dimethylsiloxane) microchannel

Zhao¹,

Zhang²,

Yang³

et al. 2011

Biomicrofluidics

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In this paper, a poly(dimethylsiloxane) microchip with amperometric detector was developed for the electrophoretic separation and determination of neurotransmitters. For increasing the separation efficiency, the microchannel is modified by polystyrene sulphonate/polystyrene nano-sphere self-assembly coating. A stable electro-osmotic flow (EOF) and higher separation efficiency are obtained in proposed modified microchannel. Under optimized conditions, dopamine, epinephrine, catechol, and serotonin are acceptably baseline separated in this 3.5 cm length separation channel with the theoretical plate number from 4.6 × 104 to 2.1 × 105 per meter and resolution from 1.29 to 12.5. The practicability of proposed microchip is validated by the recovery test with cerebrospinal fluid as real sample which resulted from 91.7% to 106.5%.

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Formation of highly monodispersed emulsifier-free cationic poly(methylstyrene) latex particles

Cited by 31 publications

References 18 publications

Latex Particles

Latex Particles

Controlling Size and Distribution for Nano-sized Polystyrene Spheres

Electrophoretic separation of neurotransmitters on a polystyrene nano-sphere/polystyrene sulphonate coated poly(dimethylsiloxane) microchannel

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