Nanoclay assisted ultra-drawing of polypropylene tapes

Erp, Tim B. van; Reynolds, Christopher T.; Bilotti, Emiliano; Peijs, Ton

doi:10.1080/20550324.2019.1671038

Cited by 11 publications

(10 citation statements)

References 45 publications

(63 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Consequently, even higher values for the tensile strength are possible. Finally, it is worth mentioning that one of the highest tensile strength values, ever reported for PP composite drawn fibers, is 860 MPa and was achieved by the addition of montmorillonite and ultra-high drawing ratio equal to 27 [ 69 ], which, however, results in non-negligible shrinkage of fibers with aging.…”

Section: Resultsmentioning

confidence: 99%

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

et al. 2022

View full text Add to dashboard Cite

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.

show abstract

Section: Resultsmentioning

confidence: 99%

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

et al. 2022

View full text Add to dashboard Cite

show abstract

“…25 However, for another MMT modification, it was reported that MMT acted not as a nucleation agent, but as a processing additive resulting in increased composite fiber drawability. 42…”

Section: Crystallinity In Pp Composites and Fibersmentioning

confidence: 99%

“…In this case, the mechanical properties improvement was attributed not to the PP reinforcement, but to the MMT acting as a processing additive that resulted in increased drawing ability. 42 Cloisite V R 20 A filler was also used to prepare PP nanocomposite fibers. SEM images showed that nanocomposite fibers presented more uniform surface, more narrow fiber diameter distribution and less roughness.…”

Section: Mineral Clay Composite Fibersmentioning

confidence: 99%

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

Tsioptsias

Leontiadis

Tzimpilis

et al. 2020

Journal of Plastic Film & Sheeting

View full text Add to dashboard Cite

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.

show abstract

“…In other words, did the improvements in fibre properties come directly from the nanofiller or indirectly from a modification of the polymer matrix by the nanofiller, leading to higher draw ratios and improved mechanical properties? For example, while Wang et al [53], showed that mechanical property improvement in their oriented PVA/ SWCNT system was the direct result of effective nanotube reinforcement, property improvement in the oriented PP nanocomposite system of Van Erp et al [63] was merely the result of improved drawability. Another reason to doubt the effectiveness of nanofillers in fully chain extended polymer systems is related to their effect on the packing density of polymer chains.…”

Section: Introductionmentioning

confidence: 99%

On the low reinforcing efficiency of carbon nanotubes in high-performance polymer fibres

Goutianos

Peijs

2021

Nanocomposites

Self Cite

View full text Add to dashboard Cite

Driven by the exceptionally high mechanical properties of carbon nanotubes (CNTs), over the years an extensive research effort has been devoted to the reinforcement of high-performance polymer fibres with CNTs. However, to date, improvements in the strength of these fibres have been rather modest even for relatively high CNT contents. After a brief review of CNT reinforced polymer fibres, here, analytical and numerical finite element models will be used to show that these experimental findings are to be expected based on the intrinsic mechanical properties of these polymer fibres and CNTs, their aspect ratio and interfacial characteristics. Results show that for realistic CNT contents and aspect ratios, the extraordinary strength of CNTs cannot be easily fully exploited in high-performance polymer fibres like Dyneema V R or Kevlar V R . Even if CNTs are perfectly aligned, bonded and dispersed, the low intrinsic shear strength of these highly anisotropic polymer fibres limits effective stress transfer and nanotube reinforcement.

show abstract

Nanoclay assisted ultra-drawing of polypropylene tapes

Cited by 11 publications

References 45 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

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

On the low reinforcing efficiency of carbon nanotubes in high-performance polymer fibres

Contact Info

Product

Resources

About