Flame Retardant and Smoke Suppressant of Fe-Organophilic Montmorillonite in Polyvinyl Chloride Nanocomposites

Two kinds of polyvinyl chloride (PVC)/organophilic montmorillonite (OMT) nanocomposites are prepared by a melt intercalation method. This study has been designed to determine if the presence of iron and zinc ions in the structure of montmorillonite (MMT) lattice can affect thermal, flame retardant a...

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Bibliographic Details
Published in:Chinese journal of chemistry 2008-12, Vol.26 (12), p.2278-2284
Main Authors: KONG, Qing-Hong, ZHANG, Jun-Hao, MA, Jing-Jun, YI, Cheng-Wu, LI, Fu-Cai, LIU, He, LU, Wei-Liang
Format: Article
Language:English
Subjects:
Fe-organophilic montmorillonite
flame retardant
limiting oxygen index
polyvinyl chloride
thermogravimetric analysis
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Summary:Two kinds of polyvinyl chloride (PVC)/organophilic montmorillonite (OMT) nanocomposites are prepared by a melt intercalation method. This study has been designed to determine if the presence of iron and zinc ions in the structure of montmorillonite (MMT) lattice can affect thermal, flame retardant and smoke suppressant properties. The information about the morphological structure of PVC/OMT nanocomposites was obtained using X‐ray diffraction and transmission electron microscopy. The thermal and flame retardant properties of the nanocomposites were characterized by thermogravimetric analysis, limiting oxygen index and smoke density. The nanocomposites based on Fe‐OMT exhibit better thermal, flame retardant properties and lower degradation degree than those of pure PVC. The degradation mechanism was studied by pyrolysis, gas chromatography and mass spectrometry (Py‐GC‐MS). Polyvinyl chloride (PVC)/Fe‐organophilic montmorillonite (OMT) and PVC/Na‐OMT nanocomposites are prepared by the melt intercalation method. The nanocomposites, based on OMT, consequently, exhibite better thermal, flame retardant and smoke suppressant properties and lower degradation degree than those of pure PVC. Through Py‐GC‐MS, it was found that Fe‐OMT including Fe3+ and Zn2+ in the lattice structure of the layers had good flame retarding and smoke suppressant effects in PVC.
ISSN:1001-604X
1614-7065
DOI:10.1002/cjoc.200890404