Evaluation of Experimental Parameters in the Microbond Test with Regard to Lyocell Fibers

Adusumalli, Ramesh Babu; Weber, Hedda K.; Roeder, Thomas; Sixta, Herbert; Gindl, Wolfgang

doi:10.1177/0731684409349929

Cited by 15 publications

(4 citation statements)

References 22 publications

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“…viscose) to the hydrophobic matrix polymer such as polypropylene (PP) is a significant drawback that hampers extended use of these fibres (Albano et al 1999). Several authors reported interfacial shear strengths (IFSS) between regenerated cellulose fibres and polyethylene (PE) and polypropylene (PP) in the range of 3-8.8 MPa based on fragmentation and microbond tests (Adusumalli et al 2006(Adusumalli et al , 2010Karlsson et al 1996;Awal et al 2011;Müssig and Graupner 2017).…”

Section: Introductionmentioning

confidence: 99%

Improvement of the fatigue behaviour of cellulose/polyolefin composites using photo-chemical fibre surface modification bio-inspired by natural role models

et al. 2020

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Based on the knowledge that plant structures often have graded stiffness transitions between strengthening elements and the surrounding matrix, which result in good damping behaviour and high toughness of the plant structure, the fatigue behaviour of composites made from rayon fibre and polypropylene (PP) as a matrix could be enhanced by photochemical surface modification of the regenerated cellulose fibres. The surface modification was achieved by deposition of UV-polymerized organic thin layers using pentaerythritol triacrylate (PETA) as the monomer. It has been shown earlier that the photochemical modification yields a decrease in wettability of the highly hydrophilic and water adsorbing viscose fibres and an increase in their affinity towards non-polar substances, thus promoting fibre-matrix adhesion. The presented experiments proved that the distinguished mechanical properties of the deposited layer structure also mimic the graded transition and provide good damping and fatigue behaviour superior to either untreated rayon/PP or rayon/maleic anhydride-modified PP composites.

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Section: Introductionmentioning

confidence: 99%

Improvement of the fatigue behaviour of cellulose/polyolefin composites using photo-chemical fibre surface modification bio-inspired by natural role models

et al. 2020

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“…Consequently, individual laboratories tend to create their own methods with essentially the same idea but different procedures. Although the application of MBT to thermosetting composites has attracted a great deal of attention over the years [4,[12][13][14][15], it has been, to a lesser extent, considered for thermoplastic systems [16][17][18]. As a result, the procedure for using this method with thermoplastic polymers needs to be further improved.…”

Section: Introductionmentioning

confidence: 99%

Development and application of micromechanical techniques for characterising interfacial shear strength in fibre-thermoplastic composites

Yang

Thomason

2012

Polymer Testing

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a b s t r a c tThe development of single fibre pull-out and microbond tests for characterising interfacial strength in thermoplastic composites is reviewed in detail. Manufacture of an experimental jig and sample preparation regimes for both tests are described. The challenges addressed in the sample preparation include the measurement of embedded fibre length for pull-out samples and the low yield rate of axisymmetric resin droplets obtained during sample preparation under nitrogen. The applications of these laboratory developed techniques are demonstrated by characterisation of the interfacial shear strength (IFSS) of glass fibre-polypropylene (GF-PP) and natural fibre-polylactic acid (NF-PLA). The comparison of the IFSS between neat and modified GF-PP showed that both methods were sensitive to the interfacial performance change despite the poor agreement between them for the absolute IFSS values from the same composite. The effect of the material modification was also reflected in load-displacement curves with different behaviour of the frictional motion after complete debonding. When a high level of fibre-matrix adhesion was realised in the composites with weak fibres, the microbond test showed higher feasibility for characterising the IFSS. This was clearly shown in its application to NF-PLA.

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“…Most of the work carried out on adhesion analysis between a plant fiber and a polymer matrix are often satisfied by the determination of an apparent interfacial shear stress and do not take in account the stiffness of the interphase. [12][13][14][15][16][17][18] The interphase plays a crucial role in the charge transfer and the toughness of the prepared composite.…”

Section: Introductionmentioning

confidence: 99%

“…Few studies have investigated the influence of the complex structure of the plant fibers on the adhesion properties to polymer matrices. Most of the work carried out on adhesion analysis between a plant fiber and a polymer matrix are often satisfied by the determination of an apparent interfacial shear stress and do not take in account the stiffness of the interphase . The interphase plays a crucial role in the charge transfer and the toughness of the prepared composite.…”

Section: Introductionmentioning

confidence: 99%

Damage analysis of composites reinforced with Alfa fibers: Viscoelastic behavior and debonding at the fiber/matrix interface

Khaldi

Vivet

Bourmaud

et al. 2016

J of Applied Polymer Sci

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In this article, we first review state‐of‐the‐art experimental techniques and measurements to characterize the mechanical properties of anisotropic vegetal alfa fibers, epoxy‐resin, and the behavior of the interphase between the matrix and alfa fibers. Second, we conduct experimental tests to determine the mechanical properties of fibers, resin, and the interphase. Third, we carry out a series of finite element simulations to predict damage initiation and to estimate crack propagation in alfa‐fiber/epoxy‐resin (AFER) composites. Different tests to determine the longitudinal Young's modulus of alfa fibers and epoxy resin as well as nanoindentation tests to obtain the transverse stiffness of the fibers are presented. Experimental results from the characterization are introduced in a micromechanical model to estimate, using the concept of the energy release rate (ERR), the matrix crack, and its interaction with interfacial debonding. The wettability problems in the preparation of vegetable composites and their effect on fiber‐matrix interfacial debonding are also addressed. The analysis of the damage behavior of AFER composites demonstrates that under load transverse to the fiber axis, a crack initiated in the matrix is propagated perpendicular to the direction of the load. Near the interface, the ERR decreases and this energy is higher in the presence of interfacial debonding areas generated by problems of fiber wettability. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43760.

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Evaluation of Experimental Parameters in the Microbond Test with Regard to Lyocell Fibers

Cited by 15 publications

References 22 publications

Improvement of the fatigue behaviour of cellulose/polyolefin composites using photo-chemical fibre surface modification bio-inspired by natural role models

Improvement of the fatigue behaviour of cellulose/polyolefin composites using photo-chemical fibre surface modification bio-inspired by natural role models

Development and application of micromechanical techniques for characterising interfacial shear strength in fibre-thermoplastic composites

Damage analysis of composites reinforced with Alfa fibers: Viscoelastic behavior and debonding at the fiber/matrix interface

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