A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
PVC nanocomposites & new nanostructurated flame retardants
Nanocomposites are of interest as a simple and cost-effective method to enhance polymer properties by the addition of a small amount of a proper designed filler (called organoclay) to the polymer leading to the creation of composites with the filler distributed in the polymer matrix at the nanometer level. Depending on the nature of the organoclay distribution within the matrix, the morphology of nanocomposites can evolve from the intercalated structure with a regular alternation of organoclays and polymer monolayers to the exfoliated (delaminated) structure with organoclays randomly and homogeneously distributed within the polymer matrix. In this work, peak of heat release rate was reduced for a PVC nanocomposite synthesized by an EMA based masterbatch route. Unzipping of HCl by< the quaternary ammonium compound from the modified montmorillonite reduced the thermal stability of PVC. This unwanted side reaction restricts up to now the realization of technical products. Halloysite, which is a nanotube based filler, could not be dispersed to a nanometer level and therefore no reductions for the peak of heat release rate were observed. But for a cable formulation with ATH and modified montmorillonite the additionally added filler halloysite obviously strengthened the char and therefore a reduction for the peak of heat release rate was observed. It could be demonstrated that nanocomposites based on ATH and modified montmorillonite improved the flame retardancy of cables for fire tests defined by the CPD regulation in Europe.
PVC nanocomposites & new nanostructurated flame retardants
Nanocomposites are of interest as a simple and cost-effective method to enhance polymer properties by the addition of a small amount of a proper designed filler (called organoclay) to the polymer leading to the creation of composites with the filler distributed in the polymer matrix at the nanometer level. Depending on the nature of the organoclay distribution within the matrix, the morphology of nanocomposites can evolve from the intercalated structure with a regular alternation of organoclays and polymer monolayers to the exfoliated (delaminated) structure with organoclays randomly and homogeneously distributed within the polymer matrix. In this work, peak of heat release rate was reduced for a PVC nanocomposite synthesized by an EMA based masterbatch route. Unzipping of HCl by< the quaternary ammonium compound from the modified montmorillonite reduced the thermal stability of PVC. This unwanted side reaction restricts up to now the realization of technical products. Halloysite, which is a nanotube based filler, could not be dispersed to a nanometer level and therefore no reductions for the peak of heat release rate were observed. But for a cable formulation with ATH and modified montmorillonite the additionally added filler halloysite obviously strengthened the char and therefore a reduction for the peak of heat release rate was observed. It could be demonstrated that nanocomposites based on ATH and modified montmorillonite improved the flame retardancy of cables for fire tests defined by the CPD regulation in Europe.
PVC nanocomposites & new nanostructurated flame retardants
PVC-Nanoverbundwerkstoffe und neue nanostrukturierte Flammverzögerer
Beyer, Günter (author)
2007
9 Seiten, 6 Bilder, 3 Tabellen, 9 Quellen
(Paper 19)
Conference paper
English
PVC Nanocomposites & Nanostucturated Flame Retardants
| British Library Conference Proceedings | 2007
Nanocomposites as a new class of flame retardants
| Tema Archive | 2002
Tema Archive | 1982
Tema Archive | 1978