Preparation and thermal properties of thermoplastic poly(vinyl alcohol) complexes with boronic acids

✍ Scribed by Hiroshi Nishimura; Nobuo Donkai; Takeaki Miyamoto

• Publisher: John Wiley and Sons
• Year: 1998
• Tongue: English
• Weight: 158 KB
• Volume: 36
• Category: Article
• ISSN: 0887-624X
• DOI: 10.1002/(sici)1099-0518(199812)36:17<3045::aid-pola5>3.0.co;2-c

✦ Synopsis

Poly(vinyl alcohol) (PVA) was converted into melt flowable derivatives by complexation with a small amount of n-butyl boronic acid (BBA) and phenyl boronic acid (PBA) in dimethylsulfoxide (DMSO), and their thermal properties were examined from a viewpoint of the melt spinning of the complexes. It was found that (1) the melting temperature of the PVA-boronic acid complexes decreases and their degradation temperature increases with increasing the boronic acid content; (2) no gelation occurs for the PVA complexes with BBA and PBA in DMSO; (3) PBA gives a larger meltingtemperature depression for PVA than BBA, but the spinnability of the complexes with BBA is much better than that with PBA; and (4) the melt-molded PVA complex fibers can be easily regenerated into PVA fibers with hot water.