Influences of catalysis and dispersion of organically modified montmorillonite on flame retardancy of polypropylene nanocomposites

The degradation and flame retardancy of polypropylene/organically modified montmorillonite (PP/OMMT) nanocomposite were studied by means of gas chromatography‐mass spectrometry and cone calorimeter. The catalysis of hydrogen proton containing montmorillonite (H‐MMT) derived from thermal decompositio...

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Bibliographic Details
Published inJournal of applied polymer science Vol. 106; no. 5; pp. 3488 - 3494
Main Authors Song, Rongjun, Wang, Zhe, Meng, Xiaoyu, Zhang, Baoyan, Tang, Tao
Format Journal Article
LanguageEnglish
Published Hoboken Wiley Subscription Services, Inc., A Wiley Company 05.12.2007
Wiley
Subjects
Applied sciences
Catalysis
Chemical reactions
Combustion
Composites
Degradation
Dispersion
Exact sciences and technology
flame retardance
Forms of application and semi-finished materials
Montmorillonite
Nanocomposites
Polymer industry, paints, wood
polypropylene
Polypropylenes
Technology of polymers
Clay
Intercalating agent
Organic clay
Montmorillonite
Dispersion degree
Propylene polymer
Dispersion reinforced material
polypropylene
Experimental study
nanocomposites
Composite material
Thermal stability
Quaternary ammonium compound
Thermal properties
flame retardance
Concentration effect
Flammability
Reaction mechanism
Olefin polymer
Nanocomposite
Thermal degradation
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Summary:The degradation and flame retardancy of polypropylene/organically modified montmorillonite (PP/OMMT) nanocomposite were studied by means of gas chromatography‐mass spectrometry and cone calorimeter. The catalysis of hydrogen proton containing montmorillonite (H‐MMT) derived from thermal decomposition of (alkyl) ammonium in the OMMT on degradation of PP strongly influence carbonization behavior of PP and then flame retardancy. Brønsted acid sites on the H‐MMT could catalyze degradation reaction of PP via cationic mechanism, which leads to the formation of char during combustion of PP via hydride transfer reaction. A continuous carbonaceous MMT‐rich char on the surface of the burned residues, which work as a protective barrier to heat and mass transfer, results from the homogeneous dispersion of OMMT in the PP matrix and appropriate char produced. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 2007
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ISSN:0021-8995
1097-4628
DOI:10.1002/app.27033