Changes occurring in the degree of crystallinity and lamellar thickness distribution of poly(viny1 alcohol) (PVA) samples during dissolution in water were investigated. PVA samples of three different molecular weights were crystallized by annealing a t 90,110, and 120Β°C. The initial degrees of cryst
Water absorption and states of water in semicrystalline poly(vinyl alcohol) films
β Scribed by R.M. Hodge; Graham H. Edward; George P. Simon
- Publisher
- Elsevier Science
- Year
- 1996
- Tongue
- English
- Weight
- 661 KB
- Volume
- 37
- Category
- Article
- ISSN
- 0032-3861
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The permeabilities of liquids through syndiotactic-rich poly (vinyl alcohol) (s-PVA) very thin films (about 0.3 pm) scooped up from the interface of air/aqueous solution were compared with that of casting s-PVA films (about 15 pm) . The permeability of water decreased with time and the volume of per
## Abstract The desorption behavior of iodine in syndiotactic poly(vinyl alcohol) (__s__βPVA) with a syndiotactic diad content of 63.1% iodine film in water was investigated in relation to the solubility of __s__βPVA in water. Despite a low numberβaverage degree of polymerization of 900, the degree