Initiation processes in the photodegradation of high impact polystyrene—II. Effects of prior exposure to sensitizing environments

✍ Scribed by A. Ghaffar; A. Scott; G. Scott

• Publisher: Elsevier Science
• Year: 1977
• Tongue: English
• Weight: 405 KB
• Volume: 13
• Category: Article
• ISSN: 0014-3057
• DOI: 10.1016/0014-3057(77)90142-2

✦ Synopsis

It is shown that processes leading to the introduction of peroxide groups into polybutadiene also lead to photo-sensitization of polybutadiene modified polystyrene (HIPS). Four such processes were compared, viz. prior thermal oxidation, ozonization, direct photolysis and photosensitization b.x added carbonyl compounds. The first three were shown to be potential photo-initiating processes and the probabilit) of their being involved in the photodegradation of commercially produced HIPS decreases in the order given.