Preparation of monodisperse melamine-formaldehyde microspheres via dispersed polycondensation

In Woo Cheong, Jin Sup Shin, Jung-Hyun Kim, Seung Jun Lee

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

We have successfully synthesized relatively monodisperse and cross-linked melamine-formaldehyde (M-F) microspheres by dispersed polycondensation and subsequent pH adjustment with serum replacement cleaning. The average particle sizes (D̄w: weight-average and D̄n: number-average), the polydispersity index (D̄w/D̄ n), the number of particles Np, and the gel content of the M-F microspheres were observed by varying the pH, the surfactant concentration, and the polymerization temperature. We observed that both the pH and the polymerization temperature were predominant factors in determining D̄n and Np, but the effect that the temperature and pH had on the gel content (> 94% for all samples) was negligible. The exponents of the slopes of plots of Np, versus pH and surfactant concentration were -10 and 0.6, respectively. Particle nucleation and growth were achieved within short periods; the incessant coagulation occurred even in the presence of surfactants.

Original languageEnglish
Pages (from-to)225-232
Number of pages8
JournalMacromolecular Research
Volume12
Issue number2
DOIs
Publication statusPublished - 2004 Jan 1

Fingerprint

Melamine
Polycondensation
Microspheres
Formaldehyde
Surface-Active Agents
Surface active agents
Gels
Polymerization
Polydispersity
Coagulation
Temperature
Particles (particulate matter)
Cleaning
Nucleation
Particle size
melamine formaldehyde

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

Cite this

Cheong, In Woo ; Shin, Jin Sup ; Kim, Jung-Hyun ; Lee, Seung Jun. / Preparation of monodisperse melamine-formaldehyde microspheres via dispersed polycondensation. In: Macromolecular Research. 2004 ; Vol. 12, No. 2. pp. 225-232.
@article{f4e59bec3cc74b659dc5635110a854a4,
title = "Preparation of monodisperse melamine-formaldehyde microspheres via dispersed polycondensation",
abstract = "We have successfully synthesized relatively monodisperse and cross-linked melamine-formaldehyde (M-F) microspheres by dispersed polycondensation and subsequent pH adjustment with serum replacement cleaning. The average particle sizes (D̄w: weight-average and D̄n: number-average), the polydispersity index (D̄w/D̄ n), the number of particles Np, and the gel content of the M-F microspheres were observed by varying the pH, the surfactant concentration, and the polymerization temperature. We observed that both the pH and the polymerization temperature were predominant factors in determining D̄n and Np, but the effect that the temperature and pH had on the gel content (> 94{\%} for all samples) was negligible. The exponents of the slopes of plots of Np, versus pH and surfactant concentration were -10 and 0.6, respectively. Particle nucleation and growth were achieved within short periods; the incessant coagulation occurred even in the presence of surfactants.",
author = "Cheong, {In Woo} and Shin, {Jin Sup} and Jung-Hyun Kim and Lee, {Seung Jun}",
year = "2004",
month = "1",
day = "1",
doi = "10.1007/BF03218392",
language = "English",
volume = "12",
pages = "225--232",
journal = "Macromolecular Research",
issn = "1598-5032",
publisher = "Polymer Society of Korea",
number = "2",

}

Preparation of monodisperse melamine-formaldehyde microspheres via dispersed polycondensation. / Cheong, In Woo; Shin, Jin Sup; Kim, Jung-Hyun; Lee, Seung Jun.

In: Macromolecular Research, Vol. 12, No. 2, 01.01.2004, p. 225-232.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Preparation of monodisperse melamine-formaldehyde microspheres via dispersed polycondensation

AU - Cheong, In Woo

AU - Shin, Jin Sup

AU - Kim, Jung-Hyun

AU - Lee, Seung Jun

PY - 2004/1/1

Y1 - 2004/1/1

N2 - We have successfully synthesized relatively monodisperse and cross-linked melamine-formaldehyde (M-F) microspheres by dispersed polycondensation and subsequent pH adjustment with serum replacement cleaning. The average particle sizes (D̄w: weight-average and D̄n: number-average), the polydispersity index (D̄w/D̄ n), the number of particles Np, and the gel content of the M-F microspheres were observed by varying the pH, the surfactant concentration, and the polymerization temperature. We observed that both the pH and the polymerization temperature were predominant factors in determining D̄n and Np, but the effect that the temperature and pH had on the gel content (> 94% for all samples) was negligible. The exponents of the slopes of plots of Np, versus pH and surfactant concentration were -10 and 0.6, respectively. Particle nucleation and growth were achieved within short periods; the incessant coagulation occurred even in the presence of surfactants.

AB - We have successfully synthesized relatively monodisperse and cross-linked melamine-formaldehyde (M-F) microspheres by dispersed polycondensation and subsequent pH adjustment with serum replacement cleaning. The average particle sizes (D̄w: weight-average and D̄n: number-average), the polydispersity index (D̄w/D̄ n), the number of particles Np, and the gel content of the M-F microspheres were observed by varying the pH, the surfactant concentration, and the polymerization temperature. We observed that both the pH and the polymerization temperature were predominant factors in determining D̄n and Np, but the effect that the temperature and pH had on the gel content (> 94% for all samples) was negligible. The exponents of the slopes of plots of Np, versus pH and surfactant concentration were -10 and 0.6, respectively. Particle nucleation and growth were achieved within short periods; the incessant coagulation occurred even in the presence of surfactants.

UR - http://www.scopus.com/inward/record.url?scp=2342492358&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=2342492358&partnerID=8YFLogxK

U2 - 10.1007/BF03218392

DO - 10.1007/BF03218392

M3 - Article

AN - SCOPUS:2342492358

VL - 12

SP - 225

EP - 232

JO - Macromolecular Research

JF - Macromolecular Research

SN - 1598-5032

IS - 2

ER -