Date

2011

Author

Yılmaz, Şule Seda

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The aim of this study was to improve the mechanical properties “Moplen” EP300L which is a heterophase copolymer. Polymer blends and nanocomposites were prepared by melt compounding method in a twin screw extruder. Nanofil® 5 (N5) and Nanofil® 8(N8) were used as the organoclays, and maleic anhydride grafted polypropylene (M) was used as the compatibilizer. The effects of additive concentrations and types of organoclays on the morphology, mechanical and thermal properties were investigated. Organoclay loading over 2 wt% prevented the intercalation mechanism resulting in large aggregates of clay, thus the material properties became poor even in the presence of compatibilizer. Compatibilizer addition improved the intercalation ability of the polymer, however a substantial increase in mechanical properties was not obtained up to 6 wt % loading of the compatibilizer. XRD analysis revealed that intercalated structures were formed with the addition of compatibilizer and organoclay. The nanocomposites that were prepared with N5 type organoclay showed delaminated structures at 6 wt % compatibilizer loading. v Nanofill ® 5 exhibited the highest improvements in mechanical properties, since the degree of organoclay dispersion was better in Nanofill ® 5 containing nanocomposites in comparison to Nanofill ® 8 containing ones. The DSC analysis indicated a insignificant reduction in the melting temperature of the ternary nanocomposites.

Subject Keywords

Polypropylene., Nanocomposites (Materials)

URI

http://etd.lib.metu.edu.tr/upload/12613291/index.pdf
https://hdl.handle.net/11511/20515

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Graduate School of Natural and Applied Sciences, Thesis