Next Article in Journal
Comparison of the Separation Performances of Cinchona Alkaloid-Based Zwitterionic Stationary Phases in the Enantioseparation of β2- and β3-Amino Acids
Previous Article in Journal
Synthesis and Anti-Trypanosoma cruzi Activity of Diaryldiazepines
Article Menu

Export Article

Open AccessArticle
Molecules 2015, 20(1), 52-69; doi:10.3390/molecules20010052

Effect of Monomer Dosing Rate in the Preparation of Mesoporous Polystyrene Nanoparticles by Semicontinuous Heterophase Polymerization

1
Departamento de Procesos de Polimerización, Centro de Investigación en Química Aplicada, Blvd. Enrique Reyna No. 140, C. P. 25294 Saltillo, Coahuila, Mexico
2
Departamentos de Química e Ingeniería Química, Centro Universitario de Ciencias Exactas e Ingenierías, Universidad de Guadalajara, Blvd. M. García-Barragán No. 1451, C. P. 44430 Guadalajara, Jalisco, Mexico
*
Author to whom correspondence should be addressed.
Academic Editor: Derek J. McPhee
Received: 15 October 2014 / Accepted: 15 December 2014 / Published: 23 December 2014
(This article belongs to the Section Organic Synthesis)
View Full-Text   |   Download PDF [1462 KB, uploaded 23 December 2014]   |  

Abstract

The semicontinuous heterophase polymerization of styrene in the presence of cross-linking and porogen agents was carried out. Latexes with close to 20% solid content, which contained mesoporous nanoparticles with 28 nm in average diameters, up to 0.5 cm3/g in porosity and 6–8 nm in pore diameters were obtained. By varying the monomer dosing rate over the micellar solution, an unexpected direct dependence of instantaneous conversion on the monomer dosing rate was found. This was ascribed to the higher average number of radicals per particle attained in the polymerization at the higher dosing rate, which in turn would arise from the higher gel percentage in the polymer. It is believed that the cross-linked chains prevent encounters between radicals, delaying the bimolecular termination reactions and allowing the existence of more than one radical inside the particles, which in turn increases the propagation rate. View Full-Text
Keywords: mesoporous polystyrene nanoparticles; semicontinuous heterophase polymerization; monomer dosing rate effect mesoporous polystyrene nanoparticles; semicontinuous heterophase polymerization; monomer dosing rate effect
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Sosa, D.Y.; Guillén, L.; Saade, H.; Mendizábal, E.; Puig, J.E.; López, R.G. Effect of Monomer Dosing Rate in the Preparation of Mesoporous Polystyrene Nanoparticles by Semicontinuous Heterophase Polymerization. Molecules 2015, 20, 52-69.

Show more citation formats Show less citations formats

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]

Molecules EISSN 1420-3049 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top