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4. Specific controls
4.1 Resistance to ultraviolet radiation
Under the effect of ultraviolet (UV) rays, POMs degrade rapidly. For this reason, manufacturers introduce UV stabilizers into POMs intended for outdoor applications. The effectiveness of these stabilizers is tested in the laboratory using accelerated aging methods (Xenotest or Weather-O-Meter devices), or after exposure to outdoor conditions and measurement of the change in a mechanical property.
SCROLL TO TOP4.2 Thermal ageing resistance
Like other thermoplastics, POM...
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Specific controls
Main applications
Bibliography
Standardization
The Afnor catalog can be consulted online: http://www.afnor.fr
- Plastics – Thermomechanical Analysis (TMA) – Part 1: General principles - ISO 11359-1 - 10-99
- Plastics – Thermomechanical Analysis (TMA) – Part 2: Determination of linear thermal coefficient and glass transition temperature - ISO 11359-2 - 10-99
- Plastics –...
Polyacetal producers
Both homopolymers and copolymers are relatively difficult to produce, and have been for a long time. DuPont and Celanese were the only two producers. Numerous new plants have sprung up in the Far East.
Only DuPont and Asahi offer homopolymers. All other producers offer copolymers. Total worldwide capacity is around 780 kt (table
Organizations
United states Pharmacopoeia (USP)
French National Institute for Research and Safety (INRS)
Drug Master Files, Food and Drug Administration (FDA)
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