Epoxy-fun
ctional spontaneous gradient
copolymers of gly
cidyl metha
crylate (G) and
n-butyl a
crylate (B) were synthesized via atom transfer radi
cal polymerization (ATRP). The
copolymerization rea
ctions were
carried out in toluene solution at 70 °C, using methyl 2-bromopropionate (MBrP) as initiator and
copper
chloride with
N,
N,
N′,
N′′,
N′′-pentamethyldiethylenetriamine (PMDETA) as the
catalyst system. The kineti
c behaviour of the statisti
cal
copolymerizations was studied in a wide
composition interval with molar fra
ctions of G ranging from 0.10 to 0.75. The synthesized
copolymers were
chara
cterized by size ex
clusion
chromatography (SEC) and nu
clear magneti
c resonan
ce (NMR) spe
ctros
copy.
1H NMR was employed to determine the
copolymer
composition, demonstrating the gradient
chara
cter of the
copolymers along the main
chain in the whole monomer
conversion interval. Apart from this, the sequen
ce distribution and stereoregularity were analyzed. These mi
crostru
ctural experimental data agreed well with those
cal
culated from Mayo-Lewis terminal model (MLTM) and a Bernoullian statisti
c with an isota
cti
city parameter of
c3;G = 0.28 and a
coisota
cti
city parameter of
c3; = 0.30.
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