𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Radical Grafting Polymerization of Vinylformamide with Functionalized Silica Particles

✍ Scribed by Torsten Meyer; Stefan Spange; Stephanie Hesse; Christian Jäger; Cornelia Bellmann

Publisher
John Wiley and Sons
Year
2003
Tongue
English
Weight
171 KB
Volume
204
Category
Article
ISSN
1022-1352

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Two different radical polymerization techniques have been applied to covalently graft vinylformamide (VFA) onto silica particles. Grafting by the polymerization of VFA using an immobilized azo initiator on silica has been found less effective, because monomer conversion is limited in non‐aqueous solvents and grafting yields are low in water. Radical copolymerization of VFA with vinyltriethoxysilane (VTS)‐functionalized silica particles is suitable to produce poly(vinylformamide) (PVFA) silica hybrid particles in respectable yield. The VFA/VTS‐silica ratio determines the degree of grafting. The PVFA‐VTS‐co‐grafted silica particles can be acidically hydrolyzed into poly(vinylamine)‐grafted silica particles. Molecular structures of the surface groups and grafted polymer chains have been confirmed by means of solid state ^13^C{^1^H} cross‐polarization magic‐angle spinning (CP MAS) NMR spectroscopy. Zeta potential measurements show the altering of the former silica particles surface charges arising from the introduction of basic groups on the surface.

image

📜 SIMILAR VOLUMES

Initiator-Grafted Silica Particles for C
Initiator-Grafted Silica Particles for Controlled Free Radical Polymerization: Influence of the Initiator Structure on the Grafting Density
✍ Julien Parvole; Gaël Laruelle; Claude Guimon; Jeanne Francois; Laurent Billon 📂 Article 📅 2003 🏛 John Wiley and Sons 🌐 English ⚖ 156 KB

## Abstract A series of organic‐inorganic hybrid particles were synthesized by a self‐assembled layer of different initiators, immobilized on silica particles and used for controlled radical polymerization. We use three different initiator systems for atom‐transfer radical polymerization (ATRP), un

Atom Transfer Radical Polymerization of
Atom Transfer Radical Polymerization of Styrene and Methyl Methacrylate from Mesoporous Ordered Silica Particles
✍ Maud Save; Gwenaëlle Granvorka; Julien Bernard; Bernadette Charleux; Cédric Bois 📂 Article 📅 2006 🏛 John Wiley and Sons 🌐 English ⚖ 363 KB

## Abstract **Summary:** Mesoporous silica was used as substrate for the grafting of alkyl halides initiators. The control over the surface‐initiated polymerization of styrene and MMA, in terms of molar mass and molar mass distribution, was successfully achieved using an ATRP mechanism. The occurre

Surface Functionalization of Silica with
Surface Functionalization of Silica with 2-Vinylfuran by Cationic Polymerization
✍ Susanne Höhne; Stefan Spange 📂 Article 📅 2003 🏛 John Wiley and Sons 🌐 English ⚖ 295 KB

## Abstract Cationic surface polymerization of 2‐vinylfuran with chlorotriphenylmethane as initiator has been used for the functionalization of silica particles. The influence of monomer/initiator ratio and temperature on grafting efficiency, yield, and degree of grafting has been investigated. Gra