Role of initial polymer concentration in the physical properties of zone-drawn biodegradable poly(butylene adipate) film

✍ Scribed by Won Seok Lyoo; Joon Ho Kim; Won Sik Yoon; Byung Chul Ji; Jinwon Lee; Su Bong Yang; Yongtai Yoo; Hyo-Duk Nam

• Publisher: John Wiley and Sons
• Year: 2001
• Tongue: English
• Weight: 167 KB
• Volume: 82
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/app.1816

✦ Synopsis

Abstract

The effects of initial polymer concentration and zone drawing on the physical properties and hydrolytic degradation of poly(butylenes adipate) (PBA) film were investigated to prepare PBA film with various biodegradabilities and physical properties for particular uses. It was identified from the results that the initial concentration of PBA solution in chloroform caused significant changes in draw ratio of the PBA film. The maximum draw ratio of 8.2, tensile strength of 0.59 GPa, and tensile modulus of 7.8 GPa were obtained at the initial concentration of 12 g/dL, measured as an optimum polymer concentration for film casting. The chain orientations and tensile properties of the PBA film cast at this concentration were superior to those of the PBA films cast at the other concentration, although they had the same draw ratio and similar crystallinity. The hydrolytic degradation rate of the film cast at 12 g/dL was lowest among the films having the same draw ratio, film dimension, and crystallinity, indicating that degradation behaviors were greatly affected by the initial polymer concentration and the molecular orientation. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 82: 1–7, 2001