Morphological development of polypropylene in immiscible blends with cellulose acetate butyrate

Xue, Chao-Hua; Wang, Dong; Xiang, Bo; Chiou, Bor‐Sen; Sun, Gang

doi:10.1007/s10965-011-9602-x

Cited by 8 publications

(18 citation statements)

References 19 publications

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“…Interestingly,

\overset{d}{true}

is nearly constant for all the nanofibers irrespective of take‐up speed (1.0–2.5 km min −1 ). The

\overset{d}{true}

values (≈96 nm for the as‐spun and ≈93 nm for the drawn fibers) are far below that of PA11 dispersed in PLLA, but close to those of PHBV and sc ‐PLA in PLLA fibers, implying that the size of the island phase was indeed dominated by compatibility (or γ ij ) other than external variables as inferred in Section 1. In such a case, there would be a wide window for attaining PGA nanostructures with defined sizes, which is of vital significance for establishing a viable and flexible production process.…”

Section: Resultsmentioning

confidence: 55%

Poly(glycolic acid) Nanofibers via Sea‐Island Melt‐Spinning

Huang

Huang²,

Wang

et al. 2018

Macro Materials & Eng

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Poly(glycolic acid) (PGA) nanofibers are prepared via the high‐speed sea‐island melt‐spinning process for the first time. Poly(l‐lactide) (PLLA) is chosen as the matrix (the “sea” phase) because of its superior spinnability and compatibility with PGA. The process includes melt‐spinning of PLLA/PGA blends at 1.0–2.5 km min−1, hot‐drawing of the as‐spun blend fibers (optional), and dissolving the PLLA phase in chloroform. At an optimal blend ratio, the process is readily conducted, producing ultrafine, uniform, and well‐aligned PGA nanofibers with high degrees of molecular orientation. Studies on morphology evolution of the blends reveal that the PGA phase presents initially as microgranules in the melt blends, breaks into nanogranules in the extruded filaments, and eventually deforms into nanofibers in the as‐spun and drawn fibers. The nanofibers show nearly constant diameters independent of take‐up speed, pointing to phase compatibility dominated mechanism which can be used to establish a viable and flexible production process.

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“…Interestingly,

\overset{d}{true}

is nearly constant for all the nanofibers irrespective of take‐up speed (1.0–2.5 km min −1 ). The

\overset{d}{true}

Section: Resultsmentioning

confidence: 55%

Poly(glycolic acid) Nanofibers via Sea‐Island Melt‐Spinning

Huang

Huang²,

Wang

et al. 2018

Macro Materials & Eng

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“…With regard to the extraction of nanofibers from the blend of thermoplastic polymers with CAB, a few general points are noticeable . The immiscible blends of thermoplastic polymers with CAB lead to the formation of nanofiber mat and nanofiber yarn.…”

Section: Discussionmentioning

confidence: 99%

“…Cellulose acetate butyrate (CAB) is a biologically based thermoplastic polymer derived from cellulosic materials; it is a kind of polysaccharide prepared from esterification of cellulose derived from plant residues and wastes . CAB has excellent solubility, and it is used by several researchers as a matrix and the major component in the blends with other synthetic polymers for an environmentally safe method of nanofibers preparation . Most researchers have used acetone as a solvent to remove CAB; however, different reaction times and temperatures have been reported.…”

Section: Nanofibers Prepared From the Blends Containing Cabmentioning

confidence: 99%

“…PTT nanofibers with an average diameter of 55 nm (with the range of 15 to 140 nm) were produced by controlling the drawing ratio . A mixer (Brabender) is used to prepare well‐dispersed CAB/iPP immiscible blends . The blends were then extruded through a two‐strand rod die.…”

Section: Nanofibers Prepared From the Blends Containing Cabmentioning

confidence: 99%

“…Varying the composition ratio of iPP to CAB could control the diameter of iPP spheres, and the smallest particles were obtained when the viscosity ratio was closer to unity, with other factors being equal. The average diameter of about 90 nm was obtained …”

Section: Nanofibers Prepared From the Blends Containing Cabmentioning

confidence: 99%

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Extraction of nanofibers from polymer blends: A brief review

Rabiei

Kish

2018

Polymers for Advanced Techs

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This review is about the naturally formed and intentionally produced nanofibrils or nanofibers (NFs) that have been extracted and utilized or expected to be used for special applications. The diameter of NFs ranges between a few to a few hundred nanometers. Methods to arrange synthetic NFs assembly in yarns or pads forms have been examined. High throughput productions, versatility of various thermoplastics, and less environmental pollution are the advantages of the methods of extraction, which seems to make it as an economical process. It can also be used for the polymers that are difficult to be converted to NFs by electrospinning. The process is challenging and scientifically fascinating to attract the investigators. There are many more polymers to be considered, and there are many more envisioned applications that have to be practiced in the future. A theoretical base is needed for the evaluation of the effects of polymer flow parameters on the extracted NFs properties.

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Fabrication and properties of poly(l‐lactide) nanofibers via blend sea‐island melt spinning

Zhang

Jin

et al. 2014

J of Applied Polymer Sci

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Poly(l‐lactide) (PLLA) nanofibers were prepared by melt extrusion of immiscible blends of PLLA/low density polyethylene (LDPE) and subsequent removal of the LDPE matrix from the blend fibers. The effect of blends composition and draw ratio on the phase structure of the blend fibers, crystallization, mechanical properties, and the diameter of the PLLA nanofibers was investigated. It is found that the diameter of the PLLA phase gradually increases with the increase of PLLA content. With the variation of PLLA content from 50 to 60 wt %, the average diameter of acquired PLLA nanofibers changes from 119 to 153 nm under the draw ratio of 1.5. When further increasing the content of PLLA to 65%, it is difficult to acquire PLLA nanofibers due to the poor dissolving properties between PLLA and LDPE components. Oriented PLLA nanofibers with the average diameter of 92 nm can be fabricated from PLLA/LDPE (50/50, wt %) blends under the draw ratio of 2. The present results suggest that it is possible to acquire polymer nanofibers with high output using blend sea‐island melt spinning. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 41228.

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Morphological development of polypropylene in immiscible blends with cellulose acetate butyrate

Cited by 8 publications

References 19 publications

Poly(glycolic acid) Nanofibers via Sea‐Island Melt‐Spinning

Poly(glycolic acid) Nanofibers via Sea‐Island Melt‐Spinning

Extraction of nanofibers from polymer blends: A brief review

Fabrication and properties of poly(l‐lactide) nanofibers via blend sea‐island melt spinning

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