Solubility of additives in polypropylene

✍ Scribed by H.P. Frank; R. Frenzel

• Publisher: Elsevier Science
• Year: 1980
• Tongue: English
• Weight: 193 KB
• Volume: 16
• Category: Article
• ISSN: 0014-3057
• DOI: 10.1016/0014-3057(80)90104-4

✦ Synopsis

The solubilities of many additives (anti-oxidants, peroxide decomposers, u.v.-stabilizers etc.) in atactic and isotactic polypropylene were studied by an optical method in the range 70-200 °. The additives can be grouped in three categories: (1) Highly soluble (more than 10 wt% at 200°); (2) Moderately soluble (less than 10wt% at 200°); (3) Nearly insoluble (less than 1 wt% at 70°). Extrapolation of data to room temperature, taking into account the usual degree of crystallinity, leads in some cases to solubilities well below the concentrations of additives used in practice.