Preparation of Core-shell Microspheres by ATRP Synthesized Macromonomer

Poly(tert‐butyl methacrylate) macrointermediates (PtBMA‐Br) with an end of bromine atom were synthesized by atom transfer radical polymerization using ethylbromopropionate as an initiator in bulk in the presence of N,N,N′,N′′,N′′‐pentamethyl diethylenetriamine (PMDETA) as a single ligand. A new macr...

Full description

Saved in:
Bibliographic Details
Published in:Chinese journal of chemistry 2008-10, Vol.26 (10), p.1907-1912
Main Authors: CHU, Hong, YANG, Wei, CHEN, Ming-Qing, LU, Jian-Yan, SHI, Dong-Jian, AKASHI, Mitusu
Format: Article
Language:English
Subjects:
atom transfer radical polymerization
dispersion copolymerization
macromonomer
microsphere
nucleophilic substitution
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Poly(tert‐butyl methacrylate) macrointermediates (PtBMA‐Br) with an end of bromine atom were synthesized by atom transfer radical polymerization using ethylbromopropionate as an initiator in bulk in the presence of N,N,N′,N′′,N′′‐pentamethyl diethylenetriamine (PMDETA) as a single ligand. A new macromonomer (MAA‐ PtBMA) was successfully prepared via end‐group nucleophilic substitution with methacrylic acid to attain a high efficiency of C=C incorporation. The molecular weights of MAA‐PtBMA macromonomers were controllable from 5400 to 11000 g/mol, and the molecular weight distribution was narrow (≤1.20). Then, the PtBMA graft polystyrene (PtBMA‐g‐PSt) microspheres were prepared by dispersion copolymerization of MAA‐PtBMA macromonomers with styrene using 2,2′‐azobisisobutyronitrile as a free radical initiator in ethanol. The resulting PtBMA‐g‐PSt microspheres were regulated in diameter on a micron scale.
ISSN:1001-604X
1614-7065
DOI:10.1002/cjoc.200890343