Influence of reactive compatibilization on the structure and properties of PP/LDH nanocomposites

TitleInfluence of reactive compatibilization on the structure and properties of PP/LDH nanocomposites
Publication TypeJournal Article
Year of Publication2011
AuthorsLonkar, SP, Therias, S, Leroux, F, Gardette, JLuc, Singh, RPal
JournalPolymer International
Date PublishedDEC
Keywordscompatibilization, layered double hydroxides, Nanocomposites, polypropylene, Rheology, thermomechanical properties

Polypropylene (PP)/layered double hydroxide (LDH) nanocomposites were prepared by the direct melt intercalation method usingmaleic anhydride grafted polypropylene (PP-g-MAH) as a reactive compatibilizer. The compatibilization effects provided by PP-g-MAH in different weight fractions and their influence on the structure and properties of the final nanocomposites were investigated. The interactions and structural morphology of the nanocomposites were examined by Fourier transform infrared spectroscopy, X-ray diffraction and transmission electronmicroscopy. Thermal, mechanical and rheological properties of these nanocomposites were investigated as a function of compatibilizer concentration. The detailed morphological and X-ray diffraction results revealed that the degree of LDH dispersion increases as the amount of PP-g-MAH increases. Study of the linear viscoelastic properties showed that the storage modulus G' is very sensitive to the microstructure of the nanocomposite. The thermal properties of the nanocomposites were significantly influenced by the weight fraction of PP-g-MAH due to the shielding and nucleating effect of exfoliated layers. Both the tensile strength and modulus showed substantial improvements with increasing PP-g-MAH content, while the elongation at break substantially decreased, although the presence of PP-gMAH somewhat improves these values. The overall results showed that 10 wt% of compatibilizer is optimum to achieve nanocomposites with better performance. (C) 2011 Society of Chemical Industry

Type of Journal (Indian or Foreign)Foreign
Impact Factor (IF)2.37
Divison category: 
Polymer Science & Engineering