Attapulgite grafted with polystyrene via a simultaneous reverse and normal initiation atom transfer radical polymerization. Issue 11 (2nd December 2015)

• Record Type: Journal Article
• Authors: Yang, Haicun; Pu, Hongting; Gong, Fanghong
• Is Part Of: Journal of polymer science. Volume 54:Issue 11(2016)
• Page Start: 1508
• Page End: 1516
• Publication Date: 2015-12-02
• Subjects: atom transfer radical polymerization (ATRP) -- attapulgite -- clay -- modification -- grafting polymer -- hybrid particles -- polystyrene -- kinetics -- SR&NIATRP; 547
• DOI: 10.1002/pola.27998
• Languages: English
• ISSNs: 0887-624X

Abstract

ABSTRACT: The surface grafting of attapulgite (ATP) with polystyrene (PS) was established via a simultaneous reverse and normal initiation atom transfer radical polymerization (SR&NIATRP). 4‐(chloromethyl)phenyltrimethoxysilane (CMPTMS) chemical bounded on the surface of ATP (ATP‐Cl, Cl‐I) was prepared via one‐step self‐assembly. SR&NI ATRP of styrene was conducted using CuCl2 complex tris(2‐(dimethylamino)ethyl)amine (Me6 ‐TREN) as the catalytic system, initiated by 2, 2‐azobis(isobutyronitrile) (AIBN) and ATP‐Cl. FT‐IR, XRD, XPS, TGA and TEM data were consistent with the grafting of benzyl chloride groups and PS chains on ATP surface. The controllability of polymerization was investigated by the kinetics behavior under different molar ratio of AIBN and CuCl2 . The obtained polymer possessed a uniform distribution of molecular weights with a lower polydispersity index of 1.2∼1.4. The relationship between polymerization on the surface of ATP and in solution was discussed in detail based on TGA data of hybrid particles and GPC trace of free polymer in solution. © 2015 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem.2016, 54, 1508–1516 Abstract : Simultaneous reverse and normal initiation atom transfer radical polymerization (SR&NI ATRP) initiated by a dual initiator system consisting of conventional radical initiator and attapulgite‐supported ATRP initiator was used to synthesize polymer‐nanoclay hybrids. The obtained hybrids were characterized by FTIR spectroscopy, X‐ray photoelectron spectroscopy (XPS), X‐ray diffraction and thermogravimetric analysis. The kinetics of the SR&NI ATRP of styrene from the surface of attapulgite was studied in detail.