Origin of the intermediate damping peak in microlayer composites

Nazarenko, Sergei; Haderski, D.; Hiltner, A.; Baer, E.

doi:10.1002/pen.760352104

Cited by 9 publications

(10 citation statements)

References 6 publications

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“…Microlayer coextrusion [30][31][32][33][34][35], which has been widely used to produce multilayer sheets, blown films, coatings, and profiles, is a process in which two or more polymers are combined as many alternating layers. In these layered structures, the interfacial area is well defined by the number of layers and their thickness.…”

Section: Introductionmentioning

confidence: 99%

Adhesion and delamination failure mechanisms in alternating layered polyamide and polyethylene with compatibilizer

Jiang

et al. 2009

Polymer Engineering & Sci

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The effects of compatibilizer and the number of layers on the interfacial adhesion and delamination model of coextruded microlayer samples consisting of alternating layers of high-density polyethylene (HDPE) and polyamide 6 (PA6) were studied with T-peel test. When more maleic anhydride-grafted HDPE was incorporated into HDPE layer, the interfacial delamination model changed from adhesive to cohesive failure in the case of bilayer samples. For high-layer samples, the results of X-ray photoelectron spectroscopy showed that the areal density of copolymers at the interfaces increased with increasing number of layers due to strong and durable shearing forces during microlayer coextrusion. Scanning electron microscopy observation revealed that the interfacial delamination model changed from single-to multiple-interface delamination when the number of layers increased from 16 to 32. The crack propagation included a large number of layer-layer jumps. The peel strength of microlayer samples was found to be greatly influenced by the interfacial delamination mechanisms.

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Section: Introductionmentioning

confidence: 99%

Adhesion and delamination failure mechanisms in alternating layered polyamide and polyethylene with compatibilizer

Jiang

et al. 2009

Polymer Engineering & Sci

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“…On the other hand, several examples of unexpected additional damping peaks have been also reported − in the field of multilayer polymer blends. Thus, Nazarenko et al .…”

Section: Introductionmentioning

confidence: 90%

“…In the field of multilayer polymer blends, numerous observations of unexpected additional transitions have been reported. − All of these microlayer composites were based on many alternating layers of two polymers, whose glass transition temperatures were significantly different. In all cases, a third damping peak was observed at a temperature intermediate to the damping peaks corresponding to the glass transitions of the two components.…”

Section: Multilayer Polymer Blendsmentioning

confidence: 99%

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Origin of Additional Mechanical Transitions in Multicomponent Polymeric Materials

Colombini

Maurer

2002

Macromolecules

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The viscoelastic properties of several multicomponent materials (including both particulate multipolymeric materials and multilayer polymer blends) were investigated in relation to their microstructures and phase-property dependencies. Theoretical considerations based on mechanical modeling were used to explore the origin of additional mechanical transitions in experimental viscoelastic spectra. The major part of this work was devoted to particulate multicomponent systems, and especially to the further exploration of the characteristics of the so-called micromechanical transition (MMT). Although such an additional phenomenon is clearly explained as a result of a specific interphase, our investigation also provides evidence that the occurrence of a MMT in dynamic mechanical spectra reflects the contribution of the geometrical arrangement into phases of a set of properties of the pure components, rather than a molecular relaxational process within the interfacial area. Finally, on the basis of an equivalent approach, the influence of the geometrical arrangement of phases on the viscoelastic response of multilayer polymer blends was pointed out as a relevant argument to justify the existence of "spurious" additional damping peaks in some experimental dynamic mechanical spectra reported in the literature.

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“…It is necessary to prepare damping materials in order to control the mechanical vibrations and to convert them to heat. Most conventional damping materials are based on the viscoelasticity of polymeric composites 1, 2. For example, rubber has an exceptional mechanical loss factor that can usually be above 1 (tan δ > 1) 3.…”

Section: Introductionmentioning

confidence: 99%

New piezoelectric damping composites of poly(vinylidene fluoride) blended with clay and multi‐walled carbon nanotubes

Geng

Wang

Zhang

et al. 2012

Polymer International

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Damping materials are used to control mechanical vibrations, and piezoelectric damping composite is a very promising material due to its unique mechanism. In this study, a potential piezoelectric damping composite was developed by simply melt mixing poly(vinylidene fluoride) (PVDF) with small amounts of organic modified montmorillonite (OMMT) and multi-walled carbon nanotubes (MWCNTs). The piezoelectric, mechanical and electrical properties were investigated using a dynamic mechanical analyser, direct current electrical resistivity measurements, X-ray diffraction, Fourier transform infrared spectroscopy and the direct quasi-static d 33 piezoelectric coefficient method. It was found that the damping property of PVDF can be greatly improved by adding both MWCNTs and OMMT, and the composite containing 1.9 wt% of MWCNTs and 3 wt% of OMMT showed the best damping property. A model and an approximate calculation were applied to explain the improved damping property. Moreover, similar mechanical properties of PVDF composites were observed in the tensile testing and dynamic mechanical analyser measurements.

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Origin of the intermediate damping peak in microlayer composites

Cited by 9 publications

References 6 publications

Adhesion and delamination failure mechanisms in alternating layered polyamide and polyethylene with compatibilizer

Adhesion and delamination failure mechanisms in alternating layered polyamide and polyethylene with compatibilizer

Origin of Additional Mechanical Transitions in Multicomponent Polymeric Materials

New piezoelectric damping composites of poly(vinylidene fluoride) blended with clay and multi‐walled carbon nanotubes

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