Co-intercalation in PP Clay Nanocomposites: Effect of Short Chain Additives on Rheological Properties
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and
Abstract
Layered structures in inorganic minerals are not easily intercalated when combined with conventional non-polar polymers such as polypropylene (PP). A new co-intercalation method is reported whereby the combined influence of low molecular weight polar additives and polyolefin-based compatibilizers on PP-clay nanocomposites (PPCN) has been investigated. Our research has shown that the interlayer spacing of montmorillonite clay increases dramatically, and increased particle dispersion is achieved, when short chain, organic additives (typically amide-type, AM) are included. In this work, the migration of these additives into the clay galleries has been confirmed by surface energy data (from contact angle experiments) and by various capillary flow measurement techniques. Shear flow data have been used to interpret the mechanism of intercalation, following compound preparation using melt-state mixing processes. At relatively low concentrations, the erucamide molecules assist the intercalation process in nanocomposites; however if an excess of AM is apparent within the bulk polymer melt, unusual flow behavior is observed which can be attributed to wall slip. Modified melt elasticity is also obtained with the PPCN's leading to reduced die swell characteristics in extrusion processes. Significant differences in melt flow behavior can therefore be attributed to the presence of AM; a mechanism for co-intercalation has been proposed in terms of hydrogen bonding between the additives and the silicate layers.
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© 2011, Carl Hanser Verlag, Munich
Articles in the same Issue
- Contents
- Contents
- Review Article
- Nucleation of Polypropylene Homo- and Copolymers
- Regular Contributed Articles
- Fast Prediction of Injection Pressure and Minimal Front Temperature for Injection Moulding
- Study on Melt Spinning of Shaped Hollow Polypropylene Fibers
- Lower Temperature Plasticizing and Extrusion of Polymer in Spherical Screw Extruder under Vibration Force Field
- Elastomer Nanocomposites Based on NR/EPDM/Organoclay: Morphology and Properties
- Rheological Properties of Neat and Calcium Carbonate Particles Filled Polypropylene Blends under Axial Vibration Force Field
- Feasibility Analysis of an In-mold Multivariate Sensor
- Experimental Study on the Filling of Nano Structures with Infrared Mold Surface Heating
- Effect of Random and Block Copolypropylenes on Structure and Properties of Uniaxially and Biaxially Oriented PP Films
- Co-intercalation in PP Clay Nanocomposites: Effect of Short Chain Additives on Rheological Properties
- PPS-News
- PPS News
- Seikei Kakou Abstracts
- Seikei-Kakou Abstracts
- Polímeros: Ciência e Tecnologia Abstracts
- Polímeros: Ciência E Tecnologia – Abstracts 2010
Articles in the same Issue
- Contents
- Contents
- Review Article
- Nucleation of Polypropylene Homo- and Copolymers
- Regular Contributed Articles
- Fast Prediction of Injection Pressure and Minimal Front Temperature for Injection Moulding
- Study on Melt Spinning of Shaped Hollow Polypropylene Fibers
- Lower Temperature Plasticizing and Extrusion of Polymer in Spherical Screw Extruder under Vibration Force Field
- Elastomer Nanocomposites Based on NR/EPDM/Organoclay: Morphology and Properties
- Rheological Properties of Neat and Calcium Carbonate Particles Filled Polypropylene Blends under Axial Vibration Force Field
- Feasibility Analysis of an In-mold Multivariate Sensor
- Experimental Study on the Filling of Nano Structures with Infrared Mold Surface Heating
- Effect of Random and Block Copolypropylenes on Structure and Properties of Uniaxially and Biaxially Oriented PP Films
- Co-intercalation in PP Clay Nanocomposites: Effect of Short Chain Additives on Rheological Properties
- PPS-News
- PPS News
- Seikei Kakou Abstracts
- Seikei-Kakou Abstracts
- Polímeros: Ciência e Tecnologia Abstracts
- Polímeros: Ciência E Tecnologia – Abstracts 2010