Synthesis and characterization of core-shell type silica-polymer composites by surface-initiated SET-LRP. (2nd September 2017)

• Record Type: Journal Article
• Authors: Nguyen, Thi Kim Lien; Cao, Xuan Thang; Jeong, Yeon Tae; Heo, Hoon; Gal, Yeong-Soon; Lim, Kwon Taek
• Is Part Of: Molecular crystals and liquid crystals. Volume 654(2017)
• Page Start: 174
• Page End: 180
• Publication Date: 2017-09-02
• Subjects: Colloidal stability -- poly(tert-butyl acrylate) -- SET-LRP -- silica nanoparticles -- Ugi reaction; Molecular crystals -- Periodicals; Liquid crystals -- Periodicals; Liquid crystals; Molecular crystals; Periodicals; 548
• DOI: 10.1080/15421406.2017.1358038
• Languages: English
• ISSNs: 1542-1406

Abstract

ABSTRACT: A facile route for preparation of poly(tert-butyl acrylate) covalently wrapped silica nanoparticles (SiO2 /PtBA) was demonstrated by the single-electron transfer mediated living radical polymerization (SET-LRP). Firstly, the surface of silica nanoparticles (SiO2 NPs) was modified with (3-aminopropyl) trimethoxysilane. Subsequently, a SET-LRP initiator was immobilized on the amine functional SiO2 NPs by the Ugi reaction of 2-bromo-2-methylpropionic acid, benzaldehyde, and 1-pentyl isocyanide. The SET-LRP of tert-butyl acrylate was carried out by using copper wire and PMDTA as a catalyst system. The grafting of PtBA on the surface of SiO2 NPs was investigated by FT-IR, XRD, TGA, and TEM analysis. Gel permeation chromatography analysis illustrated the molecular weight of PtBA increased with monomer conversion. The hydrolysis of the PtBA part yielded hydrophilic poly(acrylic acid) decorated SiO2 NPs, which showed high colloidal stability.