Wj. Feast et al., THE SYNTHESIS AND CHARACTERIZATION OF HYPERBRANCHED POLY(DIETHYL 3-HYDROXYGLUTARATE), Journal of materials chemistry, 8(5), 1998, pp. 1121-1125
Hyperbranched aliphatic polyesters derived from the AB(2) monomer diet
hyl 3-hydroxyglutarate in the presence of titanium(Iv) butoxide are re
ported. The oligomeric products were characterised by GPC, NMR spectro
scopy and MALDI-TOF mass spectrometry. The degree of branching, molecu
lar weights and the possibility of intramolecular cyclisation reaction
s have been evaluated. MALDI-TOF mass spectrometry was used to quantif
y the extent of possible side reactions, particularly those resulting
from alkoxide exchange with the catalyst.