✦ LIBER ✦

A novel route to poly(2-hydroxyethyl methacrylate) and its amphiphilic block copolymers

✍ Scribed by Eli Ruckenstein; Hongmin Zhang

Publisher: John Wiley and Sons
Year: 1998
Tongue: English
Weight: 166 KB
Volume: 36
Category: Article
ISSN: 0887-624X
DOI: 10.1002/(sici)1099-0518(199808)36:11<1865::aid-pola21>3.0.co;2-b

No coin nor oath required. For personal study only.

✦ Synopsis

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 060ЊC 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.

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