Acid–base surface properties of modified poly(ethylene terephthalate) films and gelatin: Relationship to adhesion

✍ Scribed by L. Lavielle; J. Schultz; K. Nakajima

• Publisher: John Wiley and Sons
• Year: 1991
• Tongue: English
• Weight: 562 KB
• Volume: 42
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/app.1991.070421021

✦ Synopsis

Characterization of poly ( ethylene terephthalate) ( P E T ) films surfaces through wettability measurements and inverse gas chromatography techniques leads to a better knowledge of the potential interactions with a coating. An important case is the one relative to gelatin coatings for photographic films. In order to favor adhesion on PET, it is of interest to examine the problem in terms of acid-base interactions. PET is found amphoteric and gelatin rather basic. Several surface treatments on PET like orientation on water and flame or plasma treatment in air lead to an increase in surface acidity. Adhesion with gelatin as determined by the peel test is increased through a flame treatment, because of the higher acidity of PET and subsequent chemical bonding at the interface. Determination of acidbase surface properties of PET and gelatin appears to be an excellent tool for adhesion prediction.