Investigation of the large plastic deformation of iPP induced by plane strain compression: Stress–strain behavior and thermo-mechanical properties

Samios, Dimitrios; Tokumoto, Shinichi; Denardin, Elton Luís Gasparotto

doi:10.1016/j.ijplas.2006.02.009

Cited by 17 publications

(8 citation statements)

References 40 publications

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“…The second peak corresponds to α relaxation and the temperature at which it takes place can be labeled as dynamic glass transition temperature (T g ). This transition is related to relaxation phenomena due to mobility activation processes of noncrystalline local regions, macromolecular backbone, specific macromolecular parts or macromolecular chain terminal groups (Samios, Tokumoto, & Denardin, 2006).…”

Section: Physical-chemical Properties Of the Filmsmentioning

confidence: 99%

Edible methylcellulose-based films containing fructo-oligosaccharides as vehicles for lactic acid bacteria

Romano

Tavera-Quiroz

Bértola

et al. 2014

Food Research International

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Section: Physical-chemical Properties Of the Filmsmentioning

confidence: 99%

Edible methylcellulose-based films containing fructo-oligosaccharides as vehicles for lactic acid bacteria

Romano

Tavera-Quiroz

Bértola

et al. 2014

Food Research International

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“…The molecular weight has also been shown to influence the glass transition temperature (T g ) of polymers, with higher molecular weight samples having a higher T g [16] . This in turn influences the mobility of chains at room temperature, and since polypropylene has a T g range in the region of 0 °C, variations in the T g temperature range can have an effect on the ability of the material to displace energy at low temperatures.…”

Section: Introductionmentioning

confidence: 99%

Molecular weight and tacticity effect on morphological and mechanical properties of Ziegler–Natta catalyzed isotactic polypropylenes

2015

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SbstractThe morphological and mechanical properties of Ziegler-Natta catalyzed isotactic polypropylenes as influenced by the molecular weight and tacticity was investigated. Polypropylene samples were injection moulded into standard disks with a HAAKE MiniJet II injection moulder at 190 °C and 200 bar for morphological and mechanical tests. The morphological and mechanical properties of specimens were investigated by means of optical microscope (OM), scanning electron microscopy (SEM), microhardness (MH) and dynamic mechanical analysis (DMA). The samples exhibited a typical α-modification spherulite structure of isotactic polypropylenes crystallized from the melt. It was found that the most important factor affecting the structure and properties of these polymers is the isotacticity content. A clear molecular weight effect was also found for samples with low molecular weights. The microhardness and storage modulus values increased as crystallinity did. Accordingly, isotacticity degree is considered as the main parameter affecting the crystallinity of samples.

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“…These findings are in agreement with experimental results reported by Mohanraj et al 24 and studies on other semicrystalline polymers in the literature. 13,18,21,22 Effect of initial specimen geometry Plane strain compression tests with various initial specimen thicknesses and breadths were carried out to investigate the influence of initial specimen geometry on the material deformation behaviour. Tests were performed on POM 150NC010 at T5160uC with a nominal strain rate of 10 22 s 21 .…”

Section: Effect Of Strain Ratementioning

confidence: 99%

“…The most commonly used compression modes are the split-Hopkinson pressure bar at high strain rates, 13 the channel die test, 14 the uniaxial compression test 15 and the plane strain compression (PSC) test. 16 Compressive experimental studies have been carried out on many polymers such as polypropylene, 17,18 polyethylene, 15,19,20 poly(ethylene terephthalane) 16,21,22 and polyoxymethylene. 23,24 The present study has investigated the deformation behaviour of polyoxymethylene under PSC.…”

Section: Introductionmentioning

confidence: 99%

Plane strain compression testing of polyoxymethylene at varying strain rates and elevated temperatures

Vogiatzoglou

Barton

Mohanraj³

2010

Plastics, Rubber and Composites

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In this paper, the behaviour of three grades of polyoxymethylene (POM) in plane strain compression (PSC) has been studied at temperatures ranging from 120 to 160uC and strain rates ranging from 10 23 to 10 21 s 21 in order to provide material property data for modelling solid state orientation processes. All materials showed a similar stress-strain response characterised by an initial short linear viscoelastic region with a rounded yield point followed by an extended plastic regime with an approximately constant positive slope, indicative of linear strain hardening. It was demonstrated that the deformation behaviour of POM is strongly dependent on both temperature and strain rate. In addition, the plastic flow stress was found to be a linear function of the equivalent strain rate, suggesting an Eyring type thermally activated process. Finally, a simplified finite element material model was developed and shown to give good predictions of the PSC test data.

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Investigation of the large plastic deformation of iPP induced by plane strain compression: Stress–strain behavior and thermo-mechanical properties

Cited by 17 publications

References 40 publications

Edible methylcellulose-based films containing fructo-oligosaccharides as vehicles for lactic acid bacteria

Edible methylcellulose-based films containing fructo-oligosaccharides as vehicles for lactic acid bacteria

Molecular weight and tacticity effect on morphological and mechanical properties of Ziegler–Natta catalyzed isotactic polypropylenes

Plane strain compression testing of polyoxymethylene at varying strain rates and elevated temperatures

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