Flammability of polymers

✍ Scribed by C.P. Fenimore; F.J. Martin

• Book ID: 103040122
• Publisher: Elsevier Science
• Year: 1966
• Tongue: English
• Weight: 409 KB
• Volume: 10
• Category: Article
• ISSN: 0010-2180
• DOI: 10.1016/0010-2180(66)90059-9

✦ Synopsis

The/tammability of polymers has been measured by determining the oxyge~ content of the, atmospheres just capalde o/ burning them. The effects of the ]ollowing three commonly used al,,ents for reducing l~ammability have been compared in polyethylene. (I) A moderate degre,~ o] inhibition is con/erred by antimony trioxide plus su~cient chlorine: the maximum effect requires about 0.01 antimony atoms per Ce group in the polyethylene, and develops just as well when chlorine~antimony is six as ¢~hen it is twenty. The lull effect o] the antimony does not develop when chlorine~antimony is two. ( 2) Various phosphorus compounds are all o/ similar effectiveness per atom o] phosphorus added to polyethyh;ne. ( 3) With su~cient substitution o/ hydrogen by hatogen in polyethylene, a greater inhibition is achieved than ~s possible by (t) or ( 2). We have no evidence how, ( 1) and ( 2) inhibit burning, bat present evidence is that in (3) a large substitution of chlorine works mostly by affecting the degradation of the polymer rather than by inter/ering with gas phase flame reactions.