Abstract:The aim of the present work was to study the effect of microstructure and microfibril formation on dyeability of polypropylene/poly(butylene terephthalate)/organoclay blend nanocomposite fibres. The blend nanocomposite samples with the same blend ratio but varying in organoclay content were prepared via melt compounding by using a co‐rotating twin screw extruder. The microfibrillar morphology and nanoclay partitioning were studied using scanning electron microscopy and transmission electron microscopy together… Show more
“…From the other hand, the compatibilizing role of nanoparticles causes the reduction of the diameter and increase in the aspect ratio of fibers. The same results were previously reported by Bigdeli et al 22,27,28 and C. B. Park et al 51,52 All of these result in the improvement of the melt strength and melt elasticity of blend, in the fiber spinning processFigure 6.Scanning electron microscopy micrographs of the fully drawn yarn fiber samples (polypropylene/polypropylene grafted on maleic anhydride/poly butylene terephthalate/nanoclay) after etching with decahydronaphthalene for the nanoclay with the contents of 0 wt.…”
Section: Resultssupporting
confidence: 91%
“…chemical bonding or physical adsorption, restrict the mobility of the polymer chains. The same results were previously reported by Hajiraissi et al 15 and Bigdeli et al 22,27,28 As a result, the upturn of complex viscosity and the increase in the storage module at low frequencies region are yielded by the behavior of fibril-concentrated PBT fibers in the blend FDY fiber samples. These consequences led to the formation of a 3D physical structure organized among polymer chains, and the much greater melt interaction compared to the neat PP.…”
Section: Rheological Behaviorsupporting
confidence: 88%
“…27,[37][38][39] According to the Figure 4, nanoclay is localized in the PBT droplet and the interface of PP/PP-g-MAH/PBT/nanoclay nanocomposites. 22,27,28…”
Section: Dispersion and Localization Of Nanoclay In Pp/pbt Nanocompos...mentioning
confidence: 99%
“…Both mentioned studies suggested that nanoclay mostly resided in the interface, at low nanoclay loadings. 22,27,28 The main goal of this work was the production of highly resilient and dyeable PP-based fibers through developing PBT fibrils, as the dispersed phase, and nanoclay (i.e., Closite 30B), while retaining mechanical properties at the industrial-scale of fiber spinning process. Moreover, the conventional fiber-spinning was used for the cost-effective fibrillation of PBT in the PP/PP-g-MAH/PBT/nanoclay nanocomposite fibers.…”
Section: Introductionmentioning
confidence: 99%
“…Both mentioned studies suggested that nanoclay mostly resided in the interface, at low nanoclay loadings. 22,27,28…”
The present study has addressed the effects of nanoclay on the properties of polypropylene (PP)/polybutylene terephthalate (PBT) blend fibers such as their dyeability and, rheological and resiliency behaviors which are produced by melt spinning. The results of the differential scanning calorimetry (DSC) analysis indicated that the presence of both nanoclay and PBT significantly influenced the crystallinity of PP which also confirmed their nucleating effects on the nanocomposite fibers. Compared to neat PP fibers, the incorporation of 0.5–1wt.% of nanoclay and 10 wt.% of PBT nanocomposite fibers caused approximately 23% and 52% enhancements in the resiliency and dye uptake respectively without using toxic carriers. The rheological analysis was carried out for investigating the viscoelastic behavior, and microstructural and dispersion of nanoclay in the nanocomposite fibers. The rheological behavior in the small amplitude oscillatory shear (SAOS) test demonstrated the percolation threshold network of the structure of PBT fibrils in the PP matrix. When the PBT domains are fibrillated, the storage modulus (G′) and complex viscosity increase compared to neat PP. Also, the nonterminal behavior at low frequencies indicates the uniform dispersion of nanoclay in fiber nanocomposites. These all cause the improvement of the melt strength of the PP matrix. Transmission electron microscopy (TEM) was used to study the dispersion and localization of nanoclay. Nanoclay has also played a compatibilizing role in the immisible PP/PBT blend and was localized mainly in the PBT disperse and interface, and therefore prevented coalescence. The role of the compatibility of nanoparticles is to decrease the mean diameter of the nano-fibrils to 75 nm, for the hot-drawn nanocomposite fibers, as measured by scanning electron microscopy (SEM). All of the above lead to increasing the melt strength and elasticity of the nanocomposites in the fiber spinning process.
“…From the other hand, the compatibilizing role of nanoparticles causes the reduction of the diameter and increase in the aspect ratio of fibers. The same results were previously reported by Bigdeli et al 22,27,28 and C. B. Park et al 51,52 All of these result in the improvement of the melt strength and melt elasticity of blend, in the fiber spinning processFigure 6.Scanning electron microscopy micrographs of the fully drawn yarn fiber samples (polypropylene/polypropylene grafted on maleic anhydride/poly butylene terephthalate/nanoclay) after etching with decahydronaphthalene for the nanoclay with the contents of 0 wt.…”
Section: Resultssupporting
confidence: 91%
“…chemical bonding or physical adsorption, restrict the mobility of the polymer chains. The same results were previously reported by Hajiraissi et al 15 and Bigdeli et al 22,27,28 As a result, the upturn of complex viscosity and the increase in the storage module at low frequencies region are yielded by the behavior of fibril-concentrated PBT fibers in the blend FDY fiber samples. These consequences led to the formation of a 3D physical structure organized among polymer chains, and the much greater melt interaction compared to the neat PP.…”
Section: Rheological Behaviorsupporting
confidence: 88%
“…27,[37][38][39] According to the Figure 4, nanoclay is localized in the PBT droplet and the interface of PP/PP-g-MAH/PBT/nanoclay nanocomposites. 22,27,28…”
Section: Dispersion and Localization Of Nanoclay In Pp/pbt Nanocompos...mentioning
confidence: 99%
“…Both mentioned studies suggested that nanoclay mostly resided in the interface, at low nanoclay loadings. 22,27,28 The main goal of this work was the production of highly resilient and dyeable PP-based fibers through developing PBT fibrils, as the dispersed phase, and nanoclay (i.e., Closite 30B), while retaining mechanical properties at the industrial-scale of fiber spinning process. Moreover, the conventional fiber-spinning was used for the cost-effective fibrillation of PBT in the PP/PP-g-MAH/PBT/nanoclay nanocomposite fibers.…”
Section: Introductionmentioning
confidence: 99%
“…Both mentioned studies suggested that nanoclay mostly resided in the interface, at low nanoclay loadings. 22,27,28…”
The present study has addressed the effects of nanoclay on the properties of polypropylene (PP)/polybutylene terephthalate (PBT) blend fibers such as their dyeability and, rheological and resiliency behaviors which are produced by melt spinning. The results of the differential scanning calorimetry (DSC) analysis indicated that the presence of both nanoclay and PBT significantly influenced the crystallinity of PP which also confirmed their nucleating effects on the nanocomposite fibers. Compared to neat PP fibers, the incorporation of 0.5–1wt.% of nanoclay and 10 wt.% of PBT nanocomposite fibers caused approximately 23% and 52% enhancements in the resiliency and dye uptake respectively without using toxic carriers. The rheological analysis was carried out for investigating the viscoelastic behavior, and microstructural and dispersion of nanoclay in the nanocomposite fibers. The rheological behavior in the small amplitude oscillatory shear (SAOS) test demonstrated the percolation threshold network of the structure of PBT fibrils in the PP matrix. When the PBT domains are fibrillated, the storage modulus (G′) and complex viscosity increase compared to neat PP. Also, the nonterminal behavior at low frequencies indicates the uniform dispersion of nanoclay in fiber nanocomposites. These all cause the improvement of the melt strength of the PP matrix. Transmission electron microscopy (TEM) was used to study the dispersion and localization of nanoclay. Nanoclay has also played a compatibilizing role in the immisible PP/PBT blend and was localized mainly in the PBT disperse and interface, and therefore prevented coalescence. The role of the compatibility of nanoparticles is to decrease the mean diameter of the nano-fibrils to 75 nm, for the hot-drawn nanocomposite fibers, as measured by scanning electron microscopy (SEM). All of the above lead to increasing the melt strength and elasticity of the nanocomposites in the fiber spinning process.
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