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Polypropylene-clay composite prepared from Indian bentonite

IR@CGCRI: CSIR-Central Glass and Ceramic Research Institute, Kolkata

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Title Polypropylene-clay composite prepared from Indian bentonite
Creator Sarkar, Madhuchhanda
Dana, Kausik
Ghatak, Sankar
Banerjee, Amarnath
Subject Processing Science
Description In the present work, a set of experimental polypropylene (PP) clay composites containing pristine bentonite clay of Indian origin has been prepared and then characterized. The polymer clay composites are processed by solution mixing of polypropylene with bentonite clay using a solvent xylene and high speed electric stirrer at a temperature around 130 degrees C and then by compression molding at 170 degrees C. The mechanical properties of PP-clay composites like tensile strength, hardness and impact resistance have been investigated. Microstructural studies were carried out using scanning electron microscope and transmission electron microscope and the thermal properties were studied using differential scanning calorimeter. Mechanical properties of the prepared composites showed highest reinforcing and toughening effects of the clay filler at a loading of only 5 mass % in PP matrix. Tensile strength was observed to be highest in case of 5 mass % of clay loading and it was more than 14% of that of the neat PP, while toughness increased by more than 80%. Bentonite clay-PP composite (5 mass %) also showed 60% increase in impact energy value. However, no significant change was observed in case of hardness and tensile modulus. Higher percentages of bentonite clay did not further improve the properties with respect to pristine polypropylene. The study of the microstructure of the prepared polymer layered silicate clay composites showed a mixed morphology with multiple stacks of clay layers and tactoids of different thicknesses.
Publisher Indian Academy of Science
Date 2008-02
Type Article
Format application/pdf
Identifier http://cgcri.csircentral.net/443/1/sarkar.pdf
Sarkar, Madhuchhanda and Dana, Kausik and Ghatak, Sankar and Banerjee, Amarnath (2008) Polypropylene-clay composite prepared from Indian bentonite. Bulletin of Materials Science, 31 (1). pp. 23-28. ISSN 0250-4707
Relation http://cgcri.csircentral.net/443/