Thermal and photo-oxidative degradation of poly-1-butene film in the presence of zinc thiopicoline anilide

✍ Scribed by R. Chandra

• Publisher: John Wiley and Sons
• Year: 1981
• Tongue: English
• Weight: 546 KB
• Volume: 26
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/app.1981.070260802

✦ Synopsis

The photo-oxidative thermal stability of isotactic poly-1-hutene stabilized with zinc thiopicoline anilide (ZTPA) was investigated by means of light scattering, chemical actinometry, and spectrophotometric techniques. The inhibition and the course of the oxidative reaction was determined by measuring weight-average molecular weight, heats of activation, and quantum yield of the photolysis of the polymer film with 253.7-nm light at a temperature range of -40 to +60°C. The changes in mechanical, physical, and chemical properties of irradiated polymer film were also examined. The role of ZTPA is discussed on the basis of the luminescence and UV spectral data. ZTPA behaves both as a thermal and UV stabilizer due to a combination of different kinds of activity in the same molecule.