Study of Structure of Polypropylene Microfibres Modified with Multi-Walled Carbon Nanotubes

Fabia, Janusz; Janicki, J.; Ślusarczyk, Czesław; Rom, Monika; Graczyk, Tadeusz; Gawłowski, Andrzej

doi:10.5604/12303666.1151773

Cited by 10 publications

(14 citation statements)

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“…Regarding the drawn PP fibers, various fillers have been implemented, which can be classified in three main categories, i.e., carbonaceous fillers, mineral clays and other inorganic nanoparticles [ 27 ]. The first category includes graphene nanoplatelets [ 28 , 29 ], multi- or single- wall carbon nanotubes [ 14 , 19 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 ], or carbon nanofibers [ 18 , 41 ]. Mineral clay fillers include montmorillonite, either modified [ 42 , 43 , 44 , 45 , 46 ], or not [ 42 , 46 ], synthetic modified hectorite [ 47 ], modified hydrotalcite [ 44 ], boehmite [ 48 ] and wollastonite [ 14 ].…”

Section: Introductionmentioning

confidence: 99%

Optimization of Thermal and Mechanical Properties of Polypropylene-Wollastonite Composite Drawn Fibers Based on Surface Response Analysis

et al. 2022

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The thermal and mechanical properties of polypropylene-wollastonite composite drawn fibers were optimized via experiments selected with the Box-Behnken approach. The drawing ratio, the filler and the compatibilizer content were chosen as design variables, while the tensile strength, the melting enthalpy and the onset decomposition temperature were set as response variables. Drawn fibers with tensile strength up to 535 MPa were obtained. Results revealed that the drawing ratio is the most important factor for the enhancement of tensile strength, followed by the filler content. All the design variables slightly affected the melting temperature and the crystallinity of the matrix. Also, it was found that the addition of polypropylene grafted with maleic anhydride as compatibilizer has a multiple effect on the final properties, i.e., it induces the dispersion of both the antioxidant and the filler, tending to increase thermal stability and tensile strength, while, on the same time, deteriorates mechanical and thermal properties due to its lower molecular weight and thermal stability. Such behavior does not allow for simultaneous maximization of thermal stability and tensile strength. Optimization based on a compromise, i.e., targeting maximization of tensile strength and onset decomposition temperature higher than 300 °C, yields high desirability values and predictions in excellent agreement with verification experiments.

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Section: Introductionmentioning

confidence: 99%

Optimization of Thermal and Mechanical Properties of Polypropylene-Wollastonite Composite Drawn Fibers Based on Surface Response Analysis

et al. 2022

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“…This value is quite high. In the literature, among the highest values for PP drawn fibers that have been reported is a value of 1000 MPa [ 36 ]. This was achieved by drawing at a lower temperature (95 °C) than the crystallization temperature, using a drawing ratio of 5 and 0.2% carbon nanotubes content.…”

Section: Resultsmentioning

confidence: 99%

“…However, the crystallinity (as indicated by the heat of fusion) of these fibers only slightly increased, or even decreased after drawing. Possibly, such observations [ 36 ] are related to the low temperature of drawing. In another study [ 6 ], rather low differences were reported between the tensile strength of neat PP (398 MPa) and PP-MWNT (0.5% MWNT) composite drawn fibers (416 MPa) using a drawing ratio of 8.…”

Section: Resultsmentioning

confidence: 99%

“…There are plenty of studies using CNTs as fillers for drawn polypropylene composite fibers [ 6 , 16 , 18 , 19 , 21 , 30 , 32 , 33 , 34 , 35 , 36 , 37 ], whereas there is a paucity of research studies for polypropylene composite drawn fibers using talc as a filler [ 38 , 39 ]. Values of tensile strength in the range 300–1000 MPa have been reported in PP-drawn fibers with carbon nanotubes, e.g., for PP-amine functionalized carbon nanotubes [ 6 ] or for non-functionalized carbon nanotubes [ 36 ]. Fluorinated carbon nanotubes at a content of 10% induced a 150% increase of the maximum stress of PP fibers (from 30 to 77 MPa) [ 30 ].…”

Section: Introductionmentioning

confidence: 99%

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Surface Response Analysis for the Optimization of Mechanical and Thermal Properties of Polypropylene Composite Drawn Fibers with Talc and Carbon Nanotubes

et al. 2022

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A large portion of the produced Polypropylene (PP) is used in the form of fibers. In this industrially oriented study, the development of composite PP drawn fibers was investigated. Two types of fillers were used (ultra-fine talc and single-wall carbon nanotubes). Optimization of the thermal and mechanical properties of the produced composite drawn fibers was performed, based on the Box-Behnken design of experiments method (surface response analysis). The effect of additives, other than the filler, but typical in industrial applications, such as an antioxidant and a common compatibilizer, was investigated. The drawing ratio, the filler, and the compatibilizer or the antioxidant content were selected as design variables, whereas the tensile strength and the onset decomposition temperature were set as response variables. Fibers with very high tensile strength (up to 806 MPa) were obtained. The results revealed that the maximization of both the tensile strength and the thermal stability was not feasible for composites with talc due to multiple interactions among the used additives (antioxidant, compatibilizer, and filler). Additionally, it was found that the addition of talc in the studied particle size improved the mechanical strength of fibers only if low drawing ratios were used. On the other hand, the optimization targeting maximization of both tensile strength and thermal stability was feasible in the case of SWCNT composite fibers. It was found that the addition of carbon nanotubes improved the tensile strength; however, such improvement was rather small compared with the tremendous increase of tensile strength due to drawing.

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“…143 i-PP microfibers with 0.2% MWNTs, at 5:1 draw ratio, yielded breaking tenacity as high as 1088 MPa. 152 Photothermal (with near infrared laser) PP-MWNTs nanocomposite fiber drawing showed the same PP crystal orientation and a higher MWNT orientation, compared to the furnace-drawn fibers. The photothermally drawn fibers exhibited higher breaking stress and modulus.…”

Section: Pp Composites With Carbonaceous Fillersmentioning

confidence: 86%

Polypropylene nanocomposite fibers: A review of current trends and new developments

Tsioptsias

Leontiadis

Tzimpilis

et al. 2020

Journal of Plastic Film & Sheeting

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In this review, traditional and novel techniques for producing micro- and nano- fibers are discussed and various nanofillers, their modifications and polypropylene (PP) functionalization routes are presented. Their influence on PP properties is discussed and new PP composite fiber applications are presented. This review reveals interesting conclusions, such as that in terms of mechanical reinforcement, there is no nano-filler that can improve tensile strength to the extent that it is improved by drawing. However, in some cases, composite drawn fibers are characterized by higher tensile strength than drawn neat PP. With some notable exceptions, the PP nanocomposites lack of “dramatic” properties improvement is mainly due to the non-polar nature of the hydrocarbon chain, which does not favor strong intermolecular interactions with most popular (mainly inorganic) nano-fillers. However, other properties such as electric conductivity, water contact angle and others can be effectively altered using various nanofillers in PP matrices.

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Study of Structure of Polypropylene Microfibres Modified with Multi-Walled Carbon Nanotubes

Cited by 10 publications

References 0 publications

Optimization of Thermal and Mechanical Properties of Polypropylene-Wollastonite Composite Drawn Fibers Based on Surface Response Analysis

Optimization of Thermal and Mechanical Properties of Polypropylene-Wollastonite Composite Drawn Fibers Based on Surface Response Analysis

Surface Response Analysis for the Optimization of Mechanical and Thermal Properties of Polypropylene Composite Drawn Fibers with Talc and Carbon Nanotubes

Polypropylene nanocomposite fibers: A review of current trends and new developments

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