Investigation of gravity-spun, melt-spun, and melt-blown polypropylene fibers using atomic force microscopy

Rovère, Anne De; Shambaugh, Robert L.; O’Rear, Edgar A.

doi:10.1002/1097-4628(20000829)77:9<1921::aid-app8>3.0.co;2-1

Cited by 26 publications

(16 citation statements)

References 26 publications

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“…Yet, according to De Cupere et al ., Risnes et al ., De Rovère et al ., Wang et al ., and Suzuki et al ., the electret SP and charge retention depend on the surface state. In fact, the SP increases with the average surface roughness and the spherulite area, thereby favoring the charge carriers' retention.…”

Section: Resultsmentioning

confidence: 99%

Annealing for the improvement of the capabilities of parylene C as electret

Kachroudi

Lagomarsini

Mareau

et al. 2018

J of Applied Polymer Sci

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Parylene C is a polymer elaborated by chemical vapor deposition and is particularly useful for the coating of deformed structures. New‐generation soft energy harvesting electrostatic generators can be of complex shape. These generators need electret material in order for them to function. It could thus be interesting to incorporate parylene C in this device. However, this polymer suffers from bad retention of trapped charges after corona discharge and a poor thermal stability of these charges. In this work, parylene C polymers were subjected to specific annealing before corona charging. This induces strong changes in the crystallinity of the material. Atomic force microscopy and X‐ray diffraction quantified the crystalline nature of parylene C following the annealing temperature. Surface potential decay of corona‐charged parylene C demonstrated that annealing to about 150°C is beneficial for the trapping of charges for a long time (analysis over 12 days). At the same time, thermal stability of the electret parylene C is achieved up to 100°C. Spherulites with a specific area close to the surface of the polymer could explain such performances due to their influence on the distribution of traps. Dielectric analysis does not confirm that the decay of surface charges is correlated to the dynamics of polymer chains, although the moving of chains probably influences the flowing of these charges. In sum, annealed parylene C appears to be a new interesting candidate for electret‐based electrostatic generators. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 46908.

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Section: Resultsmentioning

confidence: 99%

Annealing for the improvement of the capabilities of parylene C as electret

Kachroudi

Lagomarsini

Mareau

et al. 2018

J of Applied Polymer Sci

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“…Typical values (Uehara et al, 1996), depending on draw ratio, are given in Table 14.4: These properties depend on the temperature and deformation rate used for the test, PP molar mass, chain orientation, and crystalline morphology. The latter characteristics are strongly dependent on the processing conditions (De Rov ere et al, 2000). As it has been previously shown, there are several processing methods: gravity spinning, melt spinning, and melt blowing.…”

Section: Initial Tensile Propertiesmentioning

confidence: 92%

Tensile properties of polypropylene fibers

Richaud

Fayolle

Davies

2018

Handbook of Properties of Textile and Technical Fibres

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“…An air assembly provides air streams with different temperatures reaching typically 50 -80 % of sound speed [1,12,13]. A polymer in the form of melt is extruded through small orifices into converging streams of hot air [10,14,15]. The drag force of the air causes rapid melt elongation into a fine fiber with a small diameter [10,14,15], as it is depicted in Figure 3.…”

Section: Meltblown Technologymentioning

confidence: 99%

“…A polymer in the form of melt is extruded through small orifices into converging streams of hot air [10,14,15]. The drag force of the air causes rapid melt elongation into a fine fiber with a small diameter [10,14,15], as it is depicted in Figure 3. Typical change in fiber diameter (expressed here as the ratio of die to final fiber diameter), is between 250 (from 0.4 mm down to 1.6 m [16]) and 667 (0.2 mm down to 300 nm [18]) for isotactic polypropylenes.…”

Section: Meltblown Technologymentioning

confidence: 99%

Meltblown technology for production of polymeric microfibers/nanofibers: A review

Drábek

Zatloukal

2019

Physics of Fluids

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This work summarizes the current state of knowledge in area of meltblown technology for production of polymeric nonwovens with specific attention to utilized polymers, die design, production of nanofibers, the effect of process variables (such as throughput rate, melt rheology, melt temperature, die temperature, air temperature/velocity/pressure and die-to-collector distance and speed) with relation to nonwoven characteristics as well as to typical flow instabilities such as whipping, die drool, fiber breakup, melt spraying, flies, generation of small isolated spherical particles, shots, jam and generation of nonuniform fiber diameters.

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Investigation of gravity-spun, melt-spun, and melt-blown polypropylene fibers using atomic force microscopy

Cited by 26 publications

References 26 publications

Annealing for the improvement of the capabilities of parylene C as electret

Annealing for the improvement of the capabilities of parylene C as electret

Tensile properties of polypropylene fibers

Meltblown technology for production of polymeric microfibers/nanofibers: A review

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