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Effect of coupling agents on thermal properties of bentonite/polypropylene composites
Bentonite/polypropylene composites were prepared using an internal mixer. Four types of coupling agents were used to treat the composites namely; LICA 12 (titanate), PPMAH (polypropylene grafted maleic anhydride), POFA (palm oil fatty acid additive) and PEAA (polyethylene grafted acrylic acid). Effects of coupling agents on thermal properties of bentonite/polypropylene composites were studied. POFA treated composites demonstrates the highest thermal stability, indicated by the greater amount of residue, and PPMAH treated composites show the lowest. However, there is an indication to suggest that PPMAH treatment is capable of inducing crystallisation as indicated by increasing the percentage of crystallinity presence in the composites. The treatments of PPMAH, PEAA, LICA 12 and POFA reduced the flammability of PP-bentonite composites. LICA 12 treated composites show the lowest burning rate. The presence of pyrophosphate in LICA 12 was hydrolysed into phosphate ester, which to some extent enhances flame retardancy.
Effect of coupling agents on thermal properties of bentonite/polypropylene composites
Bentonite/polypropylene composites were prepared using an internal mixer. Four types of coupling agents were used to treat the composites namely; LICA 12 (titanate), PPMAH (polypropylene grafted maleic anhydride), POFA (palm oil fatty acid additive) and PEAA (polyethylene grafted acrylic acid). Effects of coupling agents on thermal properties of bentonite/polypropylene composites were studied. POFA treated composites demonstrates the highest thermal stability, indicated by the greater amount of residue, and PPMAH treated composites show the lowest. However, there is an indication to suggest that PPMAH treatment is capable of inducing crystallisation as indicated by increasing the percentage of crystallinity presence in the composites. The treatments of PPMAH, PEAA, LICA 12 and POFA reduced the flammability of PP-bentonite composites. LICA 12 treated composites show the lowest burning rate. The presence of pyrophosphate in LICA 12 was hydrolysed into phosphate ester, which to some extent enhances flame retardancy.
Effect of coupling agents on thermal properties of bentonite/polypropylene composites
Othman, Nadras (Autor:in) / Ismail, H. (Autor:in) / Mariatti, M. (Autor:in)
2009
9 Seiten, 6 Bilder, 2 Tabellen, 18 Quellen
Aufsatz (Konferenz)
Englisch
Bentonit , Polypropylen , Polymermatrix-Verbundwerkstoff , Kupplungskomponente (Chemie) , Pfropfen , Maleinsäureanhydrid , FTIR-Spektroskopie , Differenzialrasterkalorimetrie , thermogravimetrische Analyse , Entflammbarkeit , Entzündungsverzögerung , thermische Stabilität , Kristallinität , Titanat , thermische Eigenschaft
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