Zeolites: New Synergistic Agents for Intumescent Fire Retardant Thermoplastic Formulations—Criteria for the Choice of the Zeolite
✍ Scribed by Serge Bourbigot; Michel Le Bras; Patrice Bréant; Jean-Michel Trémillon; René Delobel
- Publisher
- John Wiley and Sons
- Year
- 1996
- Tongue
- English
- Weight
- 812 KB
- Volume
- 20
- Category
- Article
- ISSN
- 0308-0501
No coin nor oath required. For personal study only.
✦ Synopsis
The adduct of zeolites in intumescent formulations of thermoplastic polymers (additives ammonium polyphosphate and pentaerythritol) leads to a great improvement in their fire retardant performance. A classification of different groups (A, X, Y, Mordenite and ZSM-5) is presented. The influence of the physicochemical properties of the zeolites is discussed. TG analyses reveal that the zeolite may act as a catalyst for the development of the intumescent carbonaceous material and stabilize the carbonaceous residue resulting in the degradation of the intumescent shield. Characterized by MAS-NMR "AI and %i, it is proposed that alumino-and silicophosphate species formed are catalysts active for the synthesis of a protective carbon-based material.