Dynamically Vulcanized Nanocomposite Thermoplastic Elastomers Based on EPDM/PP (Rheology & Morphology)
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G. Naderi
, P. G. Lafleur und C. Dubois
Abstract
This study examines the rheological and morphological properties of dynamically vulcanized nanocomposite thermoplastic elastomers (TPV nanocomposites) based on PP/EPDM. Rubber contents of 20, 40, and 60% were used with polypropylene of different viscosities at 2 wt.% of nanoclay. We performed rheological and morphological characterizations on the nanocomposites using X-ray diffraction, transmission electron microscopy, scanning electron microscopy and rheometry in small amplitude oscillatory shear. The effects of polypropylene viscosity, maleic anhydride grafted polypropylene (PPMA), and composition were also investigated. The storage modulus (G) of the TPV nanocomposites (without PPMA) containing 20, 40, and 60% rubber significantly increased in comparison with similar but unfilled samples and also a further increase in the G from the incorporation of the PPMA in the samples. The agglomeration of the clay considerably decreased when the rubber content was increased in the TPV nanocomposites. The yield stress of the prepared TPV nanocomposite, based on a low-viscosity PP, increased more than that of the sample from high viscosity PP. The TPV nanocomposites containing 20, 40 and 60% EPDM exhibited a strong elastic modulus that tended to level off (plateau) at low shear rates. These results were attributed to strong interfacial interactions between the nanoclay and TPV matrix and, also, the existence of the physical three-dimensional network structure formed between the cured rubber particles, as evidenced by the morphological features of the samples. A Carreau-Yasuda law with yield stress and a linear viscoelastic model, taking into account the maximum packing volume () were used to describe the melt linear viscoelastic properties of the TPV nanocomposites.
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© 2007, Carl Hanser Verlag, Munich
Artikel in diesem Heft
- Contents
- Contents
- Invited Review Paper
- Reactive Processing of Thermoplastic Polymers: A Review of the Fundamental Aspects
- Regular Contributed Articles
- Modeling and Practice of Ethanol-devolatilization of Silica-silane Rubber Compoundsin an Internal Mixer
- Numerical Investigation of Hot Embossing Filling Characteristics
- A New Scheme for Controlling Part Cooling in Injection Molding
- Dynamically Vulcanized Nanocomposite Thermoplastic Elastomers Based on EPDM/PP (Rheology & Morphology)
- An Integrated Approach for Numerical Analysis of Coupled Flow and Heat Transfer in Co-rotating Twin Screw Extruders
- Crystallinity and Linear Rheological Properties of Polymers
- Functionalization of PP with Sulfonyl Azide through Reactive Processing
- PPS News
- PPS News
- Seikei-Kakou Abstracts
- Seikei-Kakou Abstracts
Artikel in diesem Heft
- Contents
- Contents
- Invited Review Paper
- Reactive Processing of Thermoplastic Polymers: A Review of the Fundamental Aspects
- Regular Contributed Articles
- Modeling and Practice of Ethanol-devolatilization of Silica-silane Rubber Compoundsin an Internal Mixer
- Numerical Investigation of Hot Embossing Filling Characteristics
- A New Scheme for Controlling Part Cooling in Injection Molding
- Dynamically Vulcanized Nanocomposite Thermoplastic Elastomers Based on EPDM/PP (Rheology & Morphology)
- An Integrated Approach for Numerical Analysis of Coupled Flow and Heat Transfer in Co-rotating Twin Screw Extruders
- Crystallinity and Linear Rheological Properties of Polymers
- Functionalization of PP with Sulfonyl Azide through Reactive Processing
- PPS News
- PPS News
- Seikei-Kakou Abstracts
- Seikei-Kakou Abstracts