화학공학소재연구정보센터
Macromolecules, Vol.33, No.13, 4757-4764, 2000
Protection and polymerization of functional monomers. 30. Anionic living polymerization of 4-alkylstyrenes containing acetal-protected monosaccharide residues
Three new para-substituted styrene derivatives, p-[3-(1,2:5,6-di-O-isopropylidene-alpha-D-glucofuranose-3-oxy)propyl]styrene (1),p-[3-(1,2:3,4-di-O-isopropylidene-alpha-D-galactopyranose-6-oxy)propyl]-styrene (2), and p-[11-(1,2:5,6-di-O-isopropylidene-alpha-D-glucofuranose-3-oxy)undecyl]styrene (3) were synthesized by phase transfer catalyzed etherifications. Their anionic polymerizations proceed in a living manner in THF at -78 degrees C using sec-BuLi as the initiator to quantitatively afford polymers with well-controlled molecular weights (6.7-42K) and narrow molecular weight distributions (M-w/M-n < 1.06). Novel AB and BA diblock copolymers of 1 and styrene were also successfully synthesized. The stabilities of the living polymer of 1 and the already reported living polymer of m-(1,2:5,6-di-O-isopropylidene-alpha-D-glucofuranose-3-oxymethyl)styrene (4) were examined under the polymerization conditions at -78 degrees C for 22 h and -30 degrees C for 0.5 h.