Effect of halloysite on structure and properties of melt-drawn PCL/PLA microfibrillar composites

Kelnar, Ivan; Kratochvíl, Jaroslav; Fortelný, Ivan; Kaprálková, Ludmila; Zhigunov, Alexander; Khünová, Viera; Nevoralová, Martina

doi:10.3144/expresspolymlett.2016.36

Cited by 32 publications

(24 citation statements)

References 53 publications

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“…In the case of MFCs, NFs also affect drawing and related coalescence . In some cases, melt‐drawing is only possible after NF addition . Moreover, we have found that an important role is played by the modification of interface parameters by NF migration between polymer components in the course of drawing MFCs based on semicrystalline components, like the HDPE/PA6 combination.…”

Section: Introductionmentioning

confidence: 91%

Antagonistic effects on mechanical properties of microfibrillar composites with dual reinforcement: Explanation by FEA model of soft interface

Kelnar

Kratochvíl

Kaprálková

et al. 2017

J of Applied Polymer Sci

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Nanofillers (NF) in microfibrillar composites support melt‐drawing and may lead to improved performance. However, antagonistic effects have also been found. The deterioration of mechanical properties by drawing in the presence of NF, as found by other authors in analogous undrawn systems, has not yet been explained. Experiments indicating the importance of NF migration between the HDPE matrix and the PA6 fibrils in the course of drawing have led to a tentative conclusion of changed crystallinity in the interfacial area resulting in a layer with reduced modulus. This was confirmed by the finite element analysis considering the formation of a “soft” interface as a result of reduced content of HDPE spherulites at the fiber surfaces. The results show a marked impact of this phenomenon on modulus. This original concept presents a basis for explaining some antagonistic effects in multicomponent polymer systems and a tool for the more rational design of composite materials. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 44712.

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Section: Introductionmentioning

confidence: 91%

Antagonistic effects on mechanical properties of microfibrillar composites with dual reinforcement: Explanation by FEA model of soft interface

Kelnar

Kratochvíl

Kaprálková

et al. 2017

J of Applied Polymer Sci

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“…Additionally, a wide range of material properties is within reach by merely changing the blend composition [11]. PCL was blended with various other biodegradable polymers in a number of studies [12][13][14][15][16][17][18][19][20][21][22]. Amongst various biodegradable polymers, PBS was the most interesting aliphatic polyester due to its relatively good melt processability, thermal and chemical resistance, biodegradability, and excellent mechanical properties, closely comparable to those of the widely-used polyethylene (PE) and polypropylene (PP) [4,5,[15][16][17][18][19][20][21][23][24][25][26][27][28][29][30][31][32][33][34][35][36].…”

mentioning

confidence: 99%

Review on PCL, PBS, and PCL/PBS blends containing carbon nanotubes

Gumede¹,

Luyt²,

Müller³

2018

Express Polym. Lett.

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Abstract. Biodegradable polymers received considerable attention due to their contribution in the reduction of environmental concerns and the realization that global petroleum resources are finite. The development of double crystalline biobased blends such as poly(ε-caprolactone) (PCL) and poly(butylene succinate) (PBS) are particularly interesting because each component has an influence on the crystallization behaviour of the other component, and thus influences the strength and mechanical properties of a polymer blend. The lack of miscibility between PCL and PBS constitutes a bottleneck, and efforts have been made to improve the miscibility through the inclusion of copolymers. Having realized that incorporating conductive nanofillers such as carbon nanotubes (CNTs), (especially when the CNTs are functionalized or used as a masterbatch i.e., polycarbonate/MWCNTs masterbatch), into biopolymer matrices, can enhance the thermal and mechanical properties, as well as electrical and thermal conductivity, a lot of research was aimed at the production of bionanocomposites. This review paper discusses the properties of PCL, PBS, their blends, and their CNTs containing nanocomposites.

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“…The obvious limitations in mechanical behavior and dimensional stability at elevated temperatures originating in low parameters of polymeric fibrils can be improved by addition of various NF . This was demonstrated in recent studies on HDPE‐ and poly (ε‐caprolactone) (PCL)‐ matrix system. Of importance is the fact that the effect of NF is relatively complex with occurrence of both antagonistic and synergistic effects which must be harmonized to achieve enhanced parameters .…”

Section: Introductionmentioning

confidence: 99%

Effect of graphite nanoplatelets on fracture behavior of HDPE/PA66 microfibrillar composites

Kelnar

Bal

Hodan

et al. 2018

Polymer Engineering & Sci

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Effect of in situ formation of PA66 fibrils and modification with graphite nanoplatelets (GNP) on fracture behavior of the high‐density polyethylene (HDPE)‐matrix microfibrillar composites (MFC) has been evaluated using tensile impact strength (TIS) and J‐integral methods. According to J‐integral, the main mechanism of failure is unstable crack growth; dissimilar layout of both methods causes different contribution of reinforcement with GNP and PA66 fibrils to fracture process evaluated. More marked orientation and parallel loading lead to increase in impact energy by both GNP and fibrils in TIS; on the other hand, much lower contribution of fibres and even negative effect of GNP pre‐blended in HDPE was found for J‐integral as a consequence of load acting in perpendicular direction. The fact that lower addition of GNP pre‐blended in PA66 does not deteriorate impact behavior indicates that such modification of MFC is an efficient way to get materials with enhanced, well‐balanced parameters. POLYM. ENG. SCI., 59:382–388, 2019. © 2018 Society of Plastics Engineers

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Effect of halloysite on structure and properties of melt-drawn PCL/PLA microfibrillar composites

Cited by 32 publications

References 53 publications

Antagonistic effects on mechanical properties of microfibrillar composites with dual reinforcement: Explanation by FEA model of soft interface

Antagonistic effects on mechanical properties of microfibrillar composites with dual reinforcement: Explanation by FEA model of soft interface

Review on PCL, PBS, and PCL/PBS blends containing carbon nanotubes

Effect of graphite nanoplatelets on fracture behavior of HDPE/PA66 microfibrillar composites

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