Rate-accelerating of Boric Oxide for Atom Transfer Radical Polymerization of Styrene

Chem. J. Chinese Universities

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Rate-accelerating of Boric Oxide for Atom Transfer Radical Polymerization of Styrene

LIN Rui, ZHUANG Jia-Ming, XU Rui, ZHAO Jun, LIN Hua-Duan, ZOU You-Si^*

College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China

Received:2008-06-17 Revised:1900-01-01 Online:2008-11-10 Published:2008-11-10
Contact: ZOU You-Si

Abstract

Abstract: The polymerization of styrene was mediated by copper(Ⅰ) bromide/pentramethyltriamine(PMDETA) using ethyl 2-bromopropionate(EBP) as an initiator and boric oxide(BO) as a rate-accelerating additive.BO was found to be effective to accelerate ATRP of styrene, and the conversions were improved to 78.5% during 6 h at 85 ℃. An optimal molar ratio of BO/EBP for the polymerization of styrene was 4∶1. First-order kinetics, increase of M_n with respect to conversion, and the relatively narrow polydispersity demonstrate that the polymerization of styrene in the presence of BO proceeds in a living fashion. The apparent rate constant of polymerization was improved by a factor of 1.82, 1.54 and 1.5 at 65, 75 and 85 ℃ respectively. NMR spectra study indicates that no influence occurred on the structure of polystyrene when BO was added as promoter. BO is likely to solve the slow polymerization rate of ATRP and promote its industrial application.

Key words:

Boric oxide, Rate-accelerating, Styrene, Atom transfer radical polymerization(ATRP)

CLC Number:

O631

TrendMD:

LIN Rui, ZHUANG Jia-Ming, XU Rui, ZHAO Jun, LIN Hua-Duan, ZOU You-Si^*. Rate-accelerating of Boric Oxide for Atom Transfer Radical Polymerization of Styrene[J]. Chem. J. Chinese Universities, doi: .

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Rate-accelerating of Boric Oxide for Atom Transfer Radical Polymerization of Styrene

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