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Synthesis of graft and block copolymers from 2‐dimethylaminoethyl methacrylate and caprolactone
Author(s) -
MotalaTimol Shaheen,
Jhurry Dhanjay
Publication year - 2007
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.2243
Subject(s) - polymer chemistry , copolymer , atom transfer radical polymerization , methacrylate , polycaprolactone , caprolactone , macromonomer , materials science , polymerization , monomer , chemistry , polymer , composite material
Abstract This paper outlines the synthesis of a range of graft and block copolymers containing 2‐dimethylaminoethyl methacrylate and caprolactone sequences by means of two distinct strategies. In the first place, common to both pathways, low‐molar‐mass hydroxyl end‐capped polycaprolactone (PCL‐OH) was prepared by the ring‐opening polymerization of caprolactone in the presence of an aluminium alkoxide Schiff's base (HAPENAlO i Pr) as initiator followed by hydrolysis of the AlO bond. For the synthesis of copolymers with a main vinyl carbon–carbon backbone and PCL grafts, PCL‐OH was initially converted into ω‐methacryl‐PCL using methacryloyl chloride. This macromonomer was then copolymerized with 2‐dimethylaminoethyl methacrylate (DMAEMA) by atom transfer radical polymerization (ATRP). For the synthesis of block copolymers, PCL‐OH was first transformed into a bromine end‐capped PCL (PCL‐Br) with 2‐bromoisobutyryl bromide. PCL‐Br was then used as macroinitiator in various concentrations for the ATRP of 2‐dimethylaminoethyl methacrylate, thus leading to PCL and poly(DMAEMA) blocks of varying lengths. The formation of both graft and block copolymers was thoroughly checked using NMR and size exclusion chromatography. Copyright © 2007 Society of Chemical Industry