Relationship between stereostructure of poly(vinyl alcohol) and its acetalization reaction
✍ Scribed by Shibatani, Kyoichiro ;Fujii, Kiyoshi ;Ōyanagi, Yasuji ;Ukida, Junji ;Matsumoto, Masakazu
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 2007
- Weight
- 346 KB
- Volume
- 23
- Category
- Article
- ISSN
- 0449-2994
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## SYNOPSIS The grafting preference of vinyl acetate onto the methine carbon of poly(viny1 alcohol) (PVOH) versus the acetate group of poly(viny1 acetate) (PVAc) was determined as part of an attempt to prepare novel branched PVOH from partially hydrolyzed PVAc. The results showed long chain grafti
The kninetics of acid-catalyzed acetalization and ketalization of poly(viny1 alcohol) (PVA) were systematically studied in completely homogeneous media with carefully selected solvents. Thus the acetalization reaction was run in water with six aldehydes [RICHO (R, = H, CH3, CZH5, n-C3H7, i-C3H7, CIC
## Abstract It is a common view that poly(vinyl acetate) has many branches at the acetyl side group, but that the corresponding poly(vinyl alcohol) has little branching. In order to study the branching in poly(vinyl acetate) and poly(vinyl alcohol) which is formed by chain transfer to polymer, the