Modeling of spherulite microstructures in semicrystalline polymers

Oktay, Hasan; Gürses, Ercan

doi:10.1016/j.mechmat.2015.04.010

Cited by 22 publications

(12 citation statements)

References 36 publications

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“…The most common microstructure for semi‐crystalline polymers is the spherulite, where polymeric crystalline lamellae are located in amorphous phase and the content of crystalline phase is from ca. 10 to 90% . Depending on crystallization temperature, nucleation mechanism and temperature history, spherulites of different quantity and size are observed…”

Section: Resultsmentioning

confidence: 99%

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Modification of acrylic bone cements by poly(ethylene glycol) with different molecular weight

Król

Pielichowska

2016

Polymers for Advanced Techs

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The high polymerization temperature of acrylic bone cements can cause arthroplasty failure because of the thermal necrosis of surrounding bone tissue. To reduce this undesired effect we have developed novel acrylic bone cement composites containing a phase change material (PCM). As PCM poly(ethylene glycol) (PEG) of different molecular weight was applied and the effect of its incorporation on curing parameters, mechanical and morphological properties of acrylic bone cement was investigated. A significant decrease in maximum temperature from 65.8°C to 47.4°C and slight increase of setting time were observed. PEG introduction also contributed to the thermal stability of acrylic bone cement increase. SEM investigation of modified bone cement confirmed that the microstructure does not alter considerably because of PEG content. It was found that both PEG addition and incubation test contribute to an inconsiderable decrease in mechanical strength of bone cement. However, the mechanical strength increase can be caused by the fresh bone tissue incorporation into the pores appearing in bone cement.

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Section: Resultsmentioning

confidence: 99%

“…10 to 90%. [38] Depending on crystallization temperature, nucleation mechanism and temperature history, spherulites of different quantity and size are observed. [39] Investigation of acrylic bone cements modified with poly(ethylene glycol)…”

Section: Modification Of Bone Cements By Peg With Different Molecularmentioning

confidence: 99%

Modification of acrylic bone cements by poly(ethylene glycol) with different molecular weight

Król

Pielichowska

2016

Polymers for Advanced Techs

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“…Furthermore, the existing numerical models for spherulite deformation with a point-like nucleus [34,35] can be adapted to take into account the oriented nucleus structure. A model of the spherulitic damage under cyclic loading would be a major step in order to enhance current micro-mechanical models for short glass fibers composites [5,36,37].…”

Section: Spherulite Orientationmentioning

confidence: 99%

On the role of the spherulitic microstructure in fatigue damage of pure polymer and glass-fiber reinforced semi-crystalline polyamide 6.6

Raphael

Saintier

Gurny

et al. 2019

International Journal of Fatigue

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Understanding fatigue damage mechanisms in short fiber reinforced thermoplastics is a key issue in order to optimize material processing and propose physically based multiscale fatigue damage models. The present work aims at further understanding observations of fatigue damage in the polyamide 6.6 matrix with respect to its semi-crystalline structure. In this paper the polymer and associated composite are tested in their ductile regime i.e. above the glass transition temperature. Tomographic and SEM observations are used in order to establish a damage scenario at the spherulitic scale. These observations prove that fatigue damage progresses by intraspherulitic failure in their equatorial plane. Observations of the spherulite nuclei also evidence the oriented structure of the semi-crystalline polymer induced by the injection-molding manufacturing process.

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“…In the last two decades, several research efforts have been directed towards constitutive modelling of semicrystalline polymers. The existing constitutive models can be classed in three dominant categories: the composite-mechanics models [22]; the lamella- [23,24,25] and crystal-plasticity models [26]; and finally, the polymer macromolecular deformation models [27,28,29,30,31,32]. The composite-mechanics models apply the modelling principles of composite materials to describe constitutive models for SCPs.…”

Section: Introductionmentioning

confidence: 99%

Two-process constitutive model for semicrystalline polymers across a wide range of strain rates

Okereke

Akpoyomare

2019

Polymer

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Modeling of spherulite microstructures in semicrystalline polymers

Cited by 22 publications

References 36 publications

Modification of acrylic bone cements by poly(ethylene glycol) with different molecular weight

Modification of acrylic bone cements by poly(ethylene glycol) with different molecular weight

On the role of the spherulitic microstructure in fatigue damage of pure polymer and glass-fiber reinforced semi-crystalline polyamide 6.6

Two-process constitutive model for semicrystalline polymers across a wide range of strain rates

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