Blends of poly(vinyl butyral-co-vinyl alcohol) and poly(ethylene terephthalate-co-ethylene naphthalate): thermal, mechanical, and morphological properties

✍ Scribed by Jin-Hae Chang; Kwang Min Park; Chung-Seock Kang; Hwan-Kyeong Jeong

• Publisher: John Wiley and Sons
• Year: 2001
• Tongue: English
• Weight: 246 KB
• Volume: 80
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/app.1389

✦ Synopsis

Abstract

The miscibility behavior and morphology of a series of poly(vinyl butyral‐co‐vinyl alcohol) (PVBA) copolymers containing 29, 52, 76, and 88 mol % of vinyl alcohol units with poly(ethylene terephthalate‐co‐ethylene naphthalate) (PETN) was investigated by DSC and SEM. Blends of the PETN with PVBA were prepared by coprecipitation from a chloroform/o‐chlorophenol (20/80 wt %) mixture solvent. It was found that PVBAs with different vinyl alcohol content will form an immiscible phase with the amorphous PETN in the solution‐cast films. Also, PETN and PVBA with 29 mol % vinyl alcohol (PVBA‐29) are not miscible within the whole composition range. The glass‐transition temperatures of the blends were higher than those of the two‐component polymers. The values of the tensile properties of the blend films were also better than those of the original copolymer films. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 80: 2746–2751, 2001