142 Advances in Polymer Science Editorial Board: A. Abe. A.-C ...

16 B. Charleux, R. Faust
Fig. 2A–D. MWD of star-shaped poly(IBVE) obtained in toluene at – 40 °C: A living poly(IBVE):
[IBVE] 0 =0.19 mol l –1 , [HI] 0 =10 mmol l –1 , [ZnI 2 ] 0 =0.2 mmol l –1 , IBVE conversion=100%;
B first star polymer obtained from the reaction of living poly(IBVE) and divinyl
ether 1: DP arm =19, [living ends]=30 mmol l –1 , r=3.0; C,D the products (second star polymers)
obtained by the polymerization of IBVE from the living ends within the core. Molar
ratio of the second feed of IBVE to HI (or to the living end): (C) [IBVE] add /[HI] 0 =19, (D)
[IBVE] add /[HI] 0 =76. Reprinted with permission from [18]. Copyright 1992 ACS
be determined by direct analysis. For the second step with a functional monomer,
appropriate conditions to obtain living polymerization were applied and
quantitative conversions of the two additional monomers were respectively
reached, together with an increase of the average MW as observed by SEC. From
the 1 H NMR spectra of the final polymer, the degree of polymerization of the
second type of arms was in good agreement with the calculated value. Hydrolysis
of the pendant ester groups into alcohol or acid led to an amphiphilic material
with respectively hydrophobic and hydrophilic homopolymer arms attached
to a single microgel core.