Preparation of high molecular weight poly(vinyl pivalate) with high yield and high molecular weight poly(vinyl alcohol) by emulsion polymerization of vinyl pivalate and saponification
β Scribed by Du Hyun Song; Won Seok Lyoo
- Publisher
- John Wiley and Sons
- Year
- 2007
- Tongue
- English
- Weight
- 142 KB
- Volume
- 104
- Category
- Article
- ISSN
- 0021-8995
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## Abstract Highβmolecularβweight atactic poly(vinyl alcohol) (aβPVA) gels loaded with (__R,S__)β2β(3βbenzoylphenyl)propionic acid (ketoprofen) were prepared from 5, 6, 7, and 8 g/dL solutions of aβPVA with a numberβaverage degree of polymerization of 4000 in an ethylene glycol/water mixture with a
Vinyl pivalate (VPi) was polymerized in bulk by ultraviolet-ray initiation at low temperatures using 2,2-azobis(2,4-dimethylvaleronitrile) (ADMVN) and 2,2'-azobis(isobutyronitrile) (AIBN) as photoinitiators. High molecular weight (HMW) poly(vinyl pivalate) (PVPi), having a number-average degree of p