X-ray diffraction study of iPP/cand iPP/TiO2 composites relating to micromechanical properties

Autor(en)

Maria Esperanza Cagiao, Francisco J. Baltá-Calleja, Florian Spieckermann, Stefanie Scholtyssek, Mohammad Forhad Mina, M. A. H. Bhuiyan

Abstrakt

Composites of isotactic polypropylene with various contents of white clay or titanium dioxide TiO2 were prepared by extrusion molding. The extruded composites were melt-pressed at two different temperatures, and, thereafter, either slowly cooled, or quenched to room temperatures. It is shown that the structure of all the samples, as revealed by wide-angle X-ray scattering and small-angle X-ray scattering (SAXS), depends on the processing conditions. The lack of SAXS maxima in the composites suggests that the presence of the microadditives hinders the stacking of iPP lamellae. Furthermore, the microindentation hardness H in the slowly cooled composites is influenced by the type and amount of the filler used. However, in the quenched samples H depends only on the amount of the filler used, and not on its type. In case of the quenched iPP/clay composites, the relationship between H and the Young's modulus E is found to be H/E approximate to 0.12, in good agreement with Struik's theoretical predictions of se approximate to E/30, in consonance with results previously obtained for a series of polyethylene samples with different morphology.

Organisation(en)

Physik Nanostrukturierter Materialien

Externe Organisation(en)

Spanish National Research Council (CSIC), Martin-Luther-Universität Halle-Wittenberg, Bangladesh University of Engineering and Technology

Journal

Journal of Applied Polymer Science

Band

124

Seiten

3147-3153

Anzahl der Seiten

7

ISSN

0021-8995

DOI

https://doi.org/10.1002/app.34716

Publikationsdatum

2012

Peer-reviewed

Ja

ÖFOS 2012

210006 Nanotechnologie, 103018 Materialphysik

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/02bb88c7-2773-4e63-bcf7-c58fd1207165