Intumescent flame retardant systems of modified rheology

Autor:	M. Le Bras, Serge Bourbigot, Gy. Marosi, R. Delobel, Péter Anna
Rok vydání:	2002
Předmět:	Polypropylene Materials science Polymers and Plastics Rheometry Condensed Matter Physics Pentaerythritol chemistry.chemical_compound chemistry Mechanics of Materials Siloxane Materials Chemistry Char Composite material Ammonium polyphosphate Intumescent Fire retardant
Zdroj:	Polymer Degradation and Stability. 77:243-247
ISSN:	0141-3910
DOI:	10.1016/s0141-3910(02)00040-x
Popis:	A model system of intumescent flame retardants, consisting of ammonium polyphosphate and pentaerythritol was prepared and investigated in polypropylene and without the polymer matrix. Thermal scanning oscillation rheometric investigation in the temperature range of 170–500 °C was used to detect the rheological behaviour in the region of melting of the polymer and the plasticity of the char formed at higher temperature. Addition of boroxo siloxane to the model system caused advantageous changes in both regions. Increased complex viscosity and viscoelsasticity of the melt and char respectively contributes to better flame retardancy. According to DTG and FTIR studies the reactions of boroxo siloxane with pentaerythritol and ammonium polyphosphate are the reasons for the rheological changes.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::8e310980202153b352d1a8e7ab61b308 https://doi.org/10.1016/s0141-3910(02)00040-x Zobrazit plný text záznamu Full Text from ScienceDirect