The crystallization of polypropylene/halloysite fibers

Petková, Mária; Ryba, Jozef; Hrabovská, Veronika; Ujhelyiová, Anna; Hricová, Marcela

doi:10.1007/s10973-018-7703-z

Cited by 8 publications

(11 citation statements)

References 28 publications

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“…where ΔH m and ΔH c are the enthalpies of melting and cold crystallization, respectively; whereas ΔH 0 is the heat of fusion of 100% crystalline PP (209 J/g). 42 3 | RESULTS AND DISCUSSION…”

Section: Characterizationmentioning

confidence: 99%

The preparation of polypropylene microfiber yarns via vortex airflow‐assisted melt differential electrospinning

Wang,

Tan,

et al. 2024

J of Applied Polymer Sci

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Polypropylene (PP) yarn possesses the advantages of low density and exceptional mechanical properties. Through electrospinning, fibers of PP yarns can be refined from 10 to 20 μm to an ultrafine level, thereby acquiring an enlarged specific surface area and more functional sites, expanding its application in high‐value areas. Herein, vortex airflow‐assisted polymer melt differential electrospinning was proposed to fabricate PP microfiber yarns. Under the influence of an electrostatic field, molten PP automatically splits into multiple jets that are further stretched and cooled into ultrafine fibers by suction airflow induced by vortex airflow. Subsequently, multiple ultrafine fibers were twisted into PP yarns using the vortex airflow. The effects of voltage, melt feed speed, and air pressure on the PP electrospun yams formation process as well as the morphology and mechanical properties of both the yarn and fibers were investigated. The results showed that the diameter of PP fibers ranged from 3 to 5 μm. The PP microfiber yams exhibited a relatively high mechanical strength of 1.6 cN/tex under conditions of 56 kV voltage, 0.22 g/min feed rate, and 0.3 MPa air pressure. Finally, the woven fabric made from electrospun PP yams demonstrated higher hydrophobicity compared with fabric woven from commercial PP filaments, suggesting potential applications in waterproof fabrics.

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Section: Characterizationmentioning

confidence: 99%

The preparation of polypropylene microfiber yarns via vortex airflow‐assisted melt differential electrospinning

Wang,

Tan,

et al. 2024

J of Applied Polymer Sci

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“…136 The crystallization behavior of polymer nanocomposites is influenced by HNT. 116,118,137,[139][140][141][142] agent helps reorganize the crystalline structure of PLA from less perfect to a higher ordered crystal which requires a higher heat to break the crystal structure and melt, resulting in a shift T m to a higher value. 138 Few researchers also reported a decrease in T m value with incorporating HNT.…”

Section: These Hydroxyl Groups Exhibit a Low Secondary Interaction Amongmentioning

confidence: 99%

“…The crystallization behavior of polymer nanocomposites is influenced by HNT 116,118,137,139–142 . It typically affects polymer crystallization by acting as a heterogeneous nucleating agent in the polymer matrix.…”

Section: The Properties Of Polymer/hnt Nanocompositesmentioning

confidence: 99%

Recent advancement in polymer/halloysite nanotube nanocomposites for biomedical applications

et al. 2022

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Halloysite nanotubes (HNTs) have recently been the subject of extensive research as a reinforcing filler. HNT is a natural nanoclay, non‐toxic and biocompatible, hence, applicable in biomedical fields. This review focuses on the mechanical, thermal, and functional properties of polymer nanocomposites with HNT as a reinforcing agent from an experimental and theoretical perspective. In addition, this review also highlights the recent applications of polymer/HNT nanocomposites in the biomedical fields.

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“…This means that an appropriate content of HNTs can improve the mechanical properties, but the higher amount of HNTs caused a marked decrease. 30 The intrinsic brittleness of benzoxazine resin Table 2. The initial curing temperature, peak curing temperature, and curing enthalpy of composites.…”

Section: Mechanical Performances Of Dgeba/b-hnts Compositesmentioning

confidence: 99%

Preparation of benzoxazine-modified halloysite nanotubes and its application on epoxy/benzoxazine composites

Shen

Liu

et al. 2020

High Performance Polymers

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Benzoxazine monomer (named as B-aptes) was synthesized from 3-aminopropyltriethoxysilane (KH-550), bisphenol A (BPA), and paraformaldehyde. Subsequently, functionalized halloysite nanotubes were obtained by introducing B-aptes onto the surface of halloysite nanotubes (HNTs). Then, benzoxazine-modified halloysite nanotubes (B-HNTs) were used to combine with BPA epoxy resin to prepare the diglycidyl ether of bisphenol-A (DGEBA)/B-HNTs composites. The homogeneous dispersion state of modified HNTs in the cured composite matrix was observed by scanning electron microscopy. Differential scanning calorimetry was used to investigate polymerization behaviors of ternary composites. The results showed that the ternary composite possessed lower polymerization temperature compared with the neat DGEBA/benzoxazine. According to the results of thermogravimetric analysis, the thermal stability of DGEBA/benzoxazine copolymers was improved by the modified HNTs, the char yield increased with the increase of HNTs mass ratio. The results of mechanical tests and dynamic mechanical analysis displayed that the DGEBA/B-HNTs composites possessed promoted mechanical properties.

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The crystallization of polypropylene/halloysite fibers

Cited by 8 publications

References 28 publications

The preparation of polypropylene microfiber yarns via vortex airflow‐assisted melt differential electrospinning

The preparation of polypropylene microfiber yarns via vortex airflow‐assisted melt differential electrospinning

Recent advancement in polymer/halloysite nanotube nanocomposites for biomedical applications

Preparation of benzoxazine-modified halloysite nanotubes and its application on epoxy/benzoxazine composites

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