ISSN:
0887-624X
Keywords:
anionic polymerization
;
poly(2-hydroxyethyl methacrylate)
;
amphiphilic block copolymer
;
poly(methyl methacrylate)-b-poly(2-hydroxyethyl methacrylate)
;
poly(styrene)-b-poly(2-hydroxyethyl methacrylate)
;
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
The vinyl of the ester group of 2-vinyloxyethyl methacrylate was first selectively reacted with acetic acid to obtain 2-[1-(acetoxy)ethoxy]ethyl methacrylate (2). This protected monomer was subjected to anionic polymerization in tetrahydrofuran at -60°C in the presence of LiCl, using 1,1-diphenylhexyllithium as initiator. The molecular weight of the polymer could thus be controlled and a narrow molecular weight distribution obtained. The protecting group, 1-(acetoxy)ethyl, could be easily eliminated (by quenching the polymerization reaction with methanol and water) to generate poly(2-hydroxyethyl methacrylate) (poly(HEMA)). Block copolymers were also prepared by the sequential anionic polymerization of MMA and 2 or styrene and 2. They possess narrow molecular weight distributions, and controlled molecular weights and compositions. © 1998 John Wiley & Sons, Inc. J Polym Sci A: Polym Chem 36: 1865-1872, 1998
Additional Material:
5 Ill.
Type of Medium:
Electronic Resource
