Polypropylene fibres

Sen, Kushal

doi:10.1007/978-94-011-5854-1_16

Cited by 6 publications

(3 citation statements)

References 15 publications

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“…The polydispersity of commercially available polymers ranges from two to 12 or more; as a rule of thumb, the polydispersity should not exceed three for stable melt-spinning [ 11 ]. Temperature, moisture, air humidity, residence time and shear forces significantly promote molecular weight degradation during extrusion and spinning.…”

Section: Raw Materials For Melt-spinningmentioning

confidence: 99%

Melt-Spun Fibers for Textile Applications

et al. 2020

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Textiles have a very long history, but they are far from becoming outdated. They gain new importance in technical applications, and man-made fibers are at the center of this ongoing innovation. The development of high-tech textiles relies on enhancements of fiber raw materials and processing techniques. Today, melt spinning of polymers is the most commonly used method for manufacturing commercial fibers, due to the simplicity of the production line, high spinning velocities, low production cost and environmental friendliness. Topics covered in this review are established and novel polymers, additives and processes used in melt spinning. In addition, fundamental questions regarding fiber morphologies, structure-property relationships, as well as flow and draw instabilities are addressed. Multicomponent melt-spinning, where several functionalities can be combined in one fiber, is also discussed. Finally, textile applications and melt-spun fiber specialties are presented, which emphasize how ongoing research efforts keep the high value of fibers and textiles alive.

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Section: Raw Materials For Melt-spinningmentioning

confidence: 99%

Melt-Spun Fibers for Textile Applications

et al. 2020

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“…Asymmetrical CH 2 bending scissoring type is observed around 1452 cm �1 and symmetrical C-H bending around 1300 cm �1 . The presence of polypropylene is confirmed at 972 cm �1 which is irrespective of its tacticity [29,30,34]. But at 1174 cm �1 it is confirmed that the tacticity of polypropylene polymer is iso-tactic.…”

Section: Elemental Analysis (Edx)mentioning

confidence: 99%

“…This was happened due to the presence of air voids in the nonwoven structure as seen in the SEM micrograms. They have permitted nanoparticles to be encapsulated by a non-conductive fibrous matter of base fabric and adversely impacted the conductivity of the dry electrodes [29,34]. Against this PP with very low absorbency and higher water permeability had kept AgNPs on the surface only when sealed in a wet state for a prolonged interval of time and didn't alter its efficacy [27,34].…”

Section: Additional Qualitiesmentioning

confidence: 99%

Gauging performance of biosynthesized silver nanoparticles loaded polypropylene nonwoven based textile electrodes for 3-lead health monitoring electro cardiogram on analogous system

Shaikh

Chaudhari

Patel

et al. 2021

Journal of Industrial Textiles

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This work reports the engineering of textile electrodes, considered safe for humans even if worn next to skin for a longer time. Obliging this phenomenon conductive Silver nanoparticles (AgNPs) were biosynthesized from Silver Sulphate (Ag2SO4) and medicinal values enriched Ocimum Sanctum (Tulsi)leaves extract. These conductive Silver nanoparticles were loaded by spray technique on polypropylene nonwoven fabric having inbuilt antifungal characteristics, to reduce its resistivity (10Ω) for the fabrication of textile electrodes. The adequate skin-electrode impedance values were observed for the fabricated textile electrodes, viz; 1.44 MΩ–1.83 MΩ and 1.01 MΩ–1.18 MΩ, in the dry and wet state respectively. The 3-lead health monitoring electrocardiograms (ECG) were obtained on the Analogous system with the textile electrodes; dry and wet state as well as gel electrodes. The cardiograms were also taken at a smaller triangle than usual, only for the high resistance textile electrodes. The wet electrodes have executed considerably better clarity of PQR wavelets than reference gel electrodes ECG plots, and their performance was found consistent when tested after six months’ time leap. However, higher motion artifacts caused in the case of dry electrodes have resulted in distorted PQR wavelets and the tracing became worsen with increased testing time leap. This was mainly due to the encapsulation of conductive AgNPs in the air voids of the fabric, increased resistivity. The cardiogram quality has not shown peculiar benefit for a higher heart pumping pressure at the smaller triangle in either of the cases.

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A study of radical graft copolymerization on polypropylene during extrusion using two peroxide initiators

Badrossamay

Sun

2009

Polymer International

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Functionalization of polypropylene (PP) during melt extrusion has been explored extensively. In this study, two different radical initiators were employed and compared in grafting acyclic halamine precursors to PP. 2,4‐Diamino‐6‐diallylamino‐1,3,5‐triazine (NDAM) was grafted onto PP during a melt‐extrusion process using either 2,5‐dimethyl‐2,5‐(tert‐butylperoxy)hexyne (DTBHY) or dicumyl peroxide (DCP) as initiator. The results confirmed the radical graft copolymerization of the monomer onto the PP backbone during the reactive extrusion process. It was revealed that, at low monomer concentration, when peroxide initiator concentration was increased, polymer chain scission became dominant. DCP was more efficient than DTBHY as an initiator in the graft polymerization. After exposure to chlorine bleach, the grafted structures could be easily transformed into N‐halamines, which provided powerful, durable and regenerable antibacterial activities against Escherichia coli and Staphylococcus aureus. It is concluded that both DCP and DTBHY could be used as radical initiators in reactive extrusion to graft certain vinyl monomers to PP. The NDAM‐grafted PP could provide expected antibacterial function after chlorination of the grafted product in a chlorine bleach solution. The modified PP showed great potential for use in medical devices and non‐woven textiles. Copyright © 2009 Society of Chemical Industry

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Polypropylene fibres

Cited by 6 publications

References 15 publications

Melt-Spun Fibers for Textile Applications

Melt-Spun Fibers for Textile Applications

Gauging performance of biosynthesized silver nanoparticles loaded polypropylene nonwoven based textile electrodes for 3-lead health monitoring electro cardiogram on analogous system

A study of radical graft copolymerization on polypropylene during extrusion using two peroxide initiators

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