Chemiluminescence of isotactic polypropylene induced by photo-oxidative degradation and natural weathering

• Published in: Journal of applied polymer science Vol. 102; no. 5; pp. 4623 - 4629
• Main Authors: Jipa, Silviu, Setnescu, Radu, Zaharescu, Traian, Setnescu, Tanta, Kaci, Mustapha, Touati, Naima
• Format: Journal Article
• Language: English
• Published: Hoboken Wiley Subscription Services, Inc., A Wiley Company 05.12.2006; Wiley
• Subjects: Ageing; Applied sciences; chemiluminescence; Compounding ingredients; Exact sciences and technology; isotactic polypropylene; photodegradation; Physical properties; Polymer industry, paints, wood; Properties and testing; Sanduvor PR 31 stabilizing effect; Stabilizers (antioxydants, antiozonants, etc.); Technology of polymers; Performance evaluation; photodegradation; Propylene polymer; Sanduvor PR 31 stabilizing effect; Chemiluminescence; Experimental study; isotactic polypropylene; Additive; Stabilizer agent; Isotactic polymer; Piperidine derivatives; Tertiary amine; Artificial ageing; Weathering; Olefin polymer; Light stabiliser; Kinetics; Measurement method; Exposure time; Activation energy; Photochemical degradation
• ISSN: 0021-8995; 1097-4628
• DOI: 10.1002/app.24534

The analysis of the chemiluminescence (CL) kinetic parameters (induction time, oxidation rate, and activation energy) after the UV irradiation and outdoor exposure of isotactic polypropylene (i‐PP) films have been studied. The initial CL emission intensity increased with increasing photodegradation time of i‐PP films. On photodegradation, the activation energies were found to decrease linearly with time of UV‐irradiation and outdoor exposure. The slopes of these linear dependences were used to indicate the degree of photodegradation of the polymer and also for the characterization of the stabilizing effect of the additive. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 102: 4623–4629, 2006