SYNTHESIS AND CHARACTERIZATION OF FOUR-ARMED BLOCK POLY(STYRENE-b-p-NITROPHENYL METHACRYLATE)PREPARED BY THE ATRP METHOD*

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SYNTHESIS AND CHARACTERIZATION OF FOUR-ARMED BLOCK POLY(STYRENE-b-p-NITROPHENYL METHACRYLATE)PREPARED BY THE ATRP METHOD*

Papers | Updated：2021-06-21

- SYNTHESIS AND CHARACTERIZATION OF FOUR-ARMED BLOCK POLY(STYRENE-b-p-NITROPHENYL METHACRYLATE)PREPARED BY THE ATRP METHOD*
- Vol. 20, Issue 4, Pages: 353-360(2002)
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- Published：20 August 2002
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SYNTHESIS AND CHARACTERIZATION OF FOUR-ARMED BLOCK POLY(STYRENE-b-p-NITROPHENYL METHACRYLATE)PREPARED BY THE ATRP METHOD*[J]. 2002, 20(4): 353-360.
DOI：

SYNTHESIS AND CHARACTERIZATION OF FOUR-ARMED BLOCK POLY(STYRENE-b-p-NITROPHENYL METHACRYLATE)PREPARED BY THE ATRP METHOD*[J]. 2002, 20(4): 353-360. DOI：

摘要

A novel tetrafunctional initiator

C [CH2O (CH2)3 OOCCH(Br)CH3]4 (1)

was synthesized through the reaction oftetraol with α-bromopropionyl chloride

and then was used as initiator of atom transfer radical polymerization (ATRP) in thepreparation of 4-armed polystyrene (PSt) with narrow polydispersity. The structure

molecular weight and molecular weightdistribution (MWD) of each arm were studied by 1H-NMR and GPC data of hydrolyzed products of the 4-armed PSt.The ATRP of St using 1/CuBr/bpy as initiator system is of "living" character based on the following evidence:narrow MWD

constant concentration of chain radical during the polymerization

control of molecular weight by the molar ratio of monomer consumed to 1.The 4-armed poly(St-b-P-nitrophenyl methacrylate)[poly(St-b-NPMA)] was prepared by the ATRP of NPMA using 4-armed PSt with terminal bromine as the initiator

and characterized by FT-IR

1H-NMR spectra and GPC curves.The micelles with PSt as core

and PNPMA as shell were formed by dropping DMSO into a solution of 4-armed poly(St-b-NPMA) in DMF

as proved by laser light scatter(LLS) method.

Abstract

A novel tetrafunctional initiator

C [CH2O (CH2)3 OOCCH(Br)CH3]4 (1)

was synthesized through the reaction oftetraol with α-bromopropionyl chloride

and then was used as initiator of atom transfer radical polymerization (ATRP) in thepreparation of 4-armed polystyrene (PSt) with narrow polydispersity. The structure

constant concentration of chain radical during the polymerization

and characterized by FT-IR

1H-NMR spectra and GPC curves.The micelles with PSt as core

and PNPMA as shell were formed by dropping DMSO into a solution of 4-armed poly(St-b-NPMA) in DMF

as proved by laser light scatter(LLS) method.

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