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article

Failure monitoring of rubber products reinforced with waste fibers of tire recycling process

Zahraa Kadhum Rodhan, Nabel Kadum Abd-Ali, Sameer Hassan Al-Nesrawy

Diagnostyka > 2024 > Vol. 25, No. 2 > art. no. 224203

In this article, waste fibres from the recycling tire process with a different percentage of addition (0, 2.5, 5, 7.5, 10, 12.5) were mixed to increase their tensile strength, tear resistance, and bending resistance with natural rubber NR. The effect of short fiber on composite mechanical properties was investigated. Despite substantial research on the mechanical characteristics of rubber products...

article

Rheological and mechanical behavior of non‐spherical poly(lactic acid) particles embedded poly(butylene adipate‐co‐terephthalate) blend

Hye Young Chung, Joung Sook Hong, Kyung Hyun Ahn

Journal of Applied Polymer Science > 140 > 6 > n/a - n/a

In this study, the poly(lactic acid) (PLA)/poly(butylene adipate‐co‐terephthalate)(PBAT) blend is investigated to improve rheological and mechanical performances of PBAT based on rheological, mechanical, and thermal behavior analyses. The multi‐step mixing method is developed to fabricate the blend with non‐spherical morphology. In the multi‐step mixing method, blends with a wide composition range...

article

A Transparent, Skin‐Inspired Composite Film with Outstanding Tear Resistance Based on Flat Silk Cocoon

Zongpu Xu, Mingrui Wu, Weiwei Gao, Hao Bai

Advanced Materials > 32 > 34 > n/a - n/a

Flexible and transparent substrates play a fundamental role as a mechanical support in advanced electronic devices. However, commonly used polymer films, such as polydimethylsiloxane, show low tear resistance because of their crack sensitivity. Herein, inspired by the excellent mechanical robustness of the skin and its fibrous structure, an epoxy‐resin‐based composite with a flat silk cocoon as a...

article

Hybrid nanopaper of cellulose nanofibrils and PET microfibers with high tear and crumpling resistance

Johanna Desmaisons, Emil Gustafsson, Alain Dufresne, Julien Bras

Cellulose > 2018 > 25 > 12 > 7127-7142

Cellulose nanofibrils (CNF), once filtered and dried, have the particularity to form a highly cohesive network, nanopaper. One of the drawbacks of all CNF nanopapers is their relative brittleness and low tear resistance, measured as the force needed for crack propagation after introducing a notch. In this work, hybrid nanopapers with drastically improved tear and crumpling resistance were produced...

article

Jute yarn as reinforcement for polypropylene based commingled eco-composites: Effect of fibre content and chemical modifications on accelerated ageing and tear properties

Gejo George, Kuruvilla Joseph, E. R. Nagarajan

Fibers and Polymers > 2017 > 18 > 5 > 948-956

Bidirectional PP/jute yarn eco-composites were fabricated via environment friendly commingling technique and its long term durability/life time was monitored as an effect of accelerated solar ageing on its mechanical properties (tensile & flexural). Accelerated solar ageing promoted the thermal oxidation of PP thus resulting in deterioration of its properties, however; MAPP and KMnO₄ treated commingled...

article

Badania wybranych właściwości skór modyfikowanych minerałami naturalnymi z dodatkiem preparatu na bazie poliheksametylenobiguanidy

K. Ławińska, D. Gandaszewska, O. Kozar, M. Sprynskyy, more

Technologia i Jakość Wyrobów > 2017 > R. 62 > 86--95

Zbadano strukturę i wybrane parametry fizyko-mechaniczne, higieniczne i mikrobiologiczne podszewkowych skór obuwiowych z wypełnieniem opartym na naturalnych kompozytach mineralnych: zeolicie (MMZ), montmorylonicie (MMT) z dodatkiem preparatu na bazie poliheksametylenobiguanidy (PHMB). Badania wykazały poprawę badanych właściwości modyfikowanych próbek w odniesieniu do skór bez dodatku PHMB.

article

The toughest recorded spider egg case silks are woven into composites with tear-resistant architectures

Parvez Alam, Danish Otieno, Matin Nuhamunada, Roselyn Anyango, more

Materials Science and Engineering: C > 2016 > 69 > C > 195-199

In this communication, we report important preliminary evidence for possibly the toughest egg case silk threads recorded to date spun by the hermit spider, Nephilengys cruentata (G¯=193MJm⁻³). We further elucidate that the egg case itself is woven with a specialised repeat cross-weave that when subjected to tension, drives perpendicular-to-force threads to pile. This piling of threads constrains damage...

chapter

UV Exposure of Polymeric Geomembranes

P. C. Lodi, B. S. Bueno, O. M. Vilar

Geosynthetics in Civil and Environmental Engineering > Fundamental Principles and Properties of Geosynthetics > 44-48

The break of polymer chemical bonds may occur due to penetration of sun short wavelengths. In sanitary landfills for instance, ultraviolet radiation affects uncovered materials and can be dangerous during the installation of the liner and before the placement of the waste. Only the ultraviolet part of the light is harmful to the geosynthetic materials, moreover, each material is sensitive to a particular...

article

Materiały na rękawice ochronne z lateksu XNBR

S. Krzemińska, W. M. Rzymski

Elastomery > 2016 > T. 20, nr 1 > 12--17

Zbadano wpływ rodzaju glinokrzemianu warstwowego wprowadzonego do lateksu karboksylowanego kauczuku butadienowo-akrylonitrylowego (L-XNBR) na właściwości mechaniczne i barierowe materiałów otrzymanych w postaci błon lateksowych. Do badań użyto bentonitu modyfikowanego IV-rzędowymi solami amoniowymi (Nanobentu ZR-1 lub Bentonitu Specjal S-90). Lateks XNBR usieciowano konwencjonalnie siarką (1,5 cz...

article

Thermal, viscoelastic and mechanical behavior of polypropylene with synthetic boehmite alumina nanoparticles

D. Pedrazzoli, V.M. Khumalo, J. Karger-Kocsis, A. Pegoretti

Polymer Testing > 2014 > 35 > Complete > 92-100

Effects of nanofiller concentration and surface treatment on the morphology, thermal, viscoelastic and mechanical behavior of polypropylene copolymer (PP)/boehmite alumina (BA) nanocomposites were investigated. Both untreated BA particles and those treated with octylsilane (OS) or sulphonic acid compound (OS2) were added at up to 10 wt% to produce nanocomposites by melt mixing followed by film blow...

article

Mechanics and mechanisms of tear resistance of woven fabrics

Ennouri Triki, Toan Vu-Khanh, Phuong Nguyen-Tri, Hychem Boukehili

Theoretical and Applied Fracture Mechanics > 2012 > 61 > Complete > 33-39

Modeling and calculating strain energy are among the most important steps in evaluating the mechanics and mechanical of the tearing process for woven textile materials. In this paper, the parameters controlling the mechanisms of crack propagation in woven textiles have been investigated. A new model, that describes the relationship between tearing energy and fabrics’ properties, has been established...

article

Tear Resistance of Orthogonal Kevlar-PWF-reinforced TPU Film

Jiangbo BAI, Junjiang XIONG, Xu CHENG

Chinese Journal of Aeronautics > 2011 > 24 > 1 > 113-118

This work seeks to investigate the notch sensitivity and fracture behaviour of orthogonal Kevlar-plain woven fabric (PWF)- reinforced thermoplastic polyurethanes (TPU) film applied to high altitude balloon. Four types of specimens are implemented to measure notched strength and fracture toughness by conducting static tension and tear tests on an MTS system respectively. The damage and failure mechanisms...

article

Performance artificial turf components — fibrillated tape

Peter Sandkuehler, Enrique Torres, Thomas Allgeuer

Procedia Engineering > 2010 > 2 > 2 > 3367-3372

Artificial turf surfaces with “soft” yarns are increasingly used because of haptic attractiveness and player friendliness. Linear low density polyethylene (LLDPE) with low density is preferred to achieve the desired softness. The choice of LLDPE material is guided by the performance requirements outlined in the FIFA Quality Concept for football turf . Different LLDPE materials were extruded into fibrillated...

article

Dynamics of slab tear faults: Insights from numerical modelling

Alina J. Hale, Klaus-D. Gottschaldt, Gideon Rosenbaum, Laurent Bourgouin, more

Tectonophysics > 2010 > 483 > 1-2 > 58-70

Tear resistance at the edge of a slab is an important parameter controlling the evolution of subduction zones. However, compared with other subduction parameters such as plate strength, plate viscosity, plate thickness and trench width, the dynamics of tearing are poorly understood. Here we obtain a first-order understanding of the dynamics and morphology of subduction zones to resistance during tear...

chapter

Key Performance Properties of Geomembranes

Wiley Series in Polymer Science > A Guide to Polymeric Geomembranes > 189 - 253

This chapter contains sections titled: Specific Gravity (Density) Mass per Unit Area Thickness Melting Point Melt Flow Index Thermal Expansion Flexibility Conformability for Intimate Contact Ability to Resist/Accept Stress and Deformation Tensile Properties Puncture Resistance Tear Resistance Ply Adhesion of Reinforced Geomembranes Resistance to Stress Cracking Frictional Properties Low‐Temperature...

article

Properties of Composites of Unbeaten Birch and Pine Sulphate Pulps with Bacterial Cellulose

B. Surma-Ślusarska, D. Danielewicz, S. Presler

Fibres & Textiles in Eastern Europe > 2008 > Nr 6 (71) > 127--129

The possibility of modifying the structure and properties of fibrous papermaking pulps with bacterial cellulose was investigated. For this purpose, three ways of obtaining specific composites were developed. The first one consisted in making the biosynthesis of bacterial cellulose in Acetobacter xylinum culture in the presence of fibres of papermaking semiproducts; the second one involved the addition...

article

Quality of paper boards from arecanut leaf sheath

R. Raghupathy, R. Viswanathan, CT. Devadas

Bioresource Technology > 2002 > 82 > 1 > 99-100

A study was carried on utilizing arecanut leaf sheath for making paper boards. Paper boards were made with various combinations of arecanut leaf sheath with waste paper, 1:1, 1:2, 1:3, 3:1, 2:1, control (100% areca leaf sheath) and the qualities of these paper boards were tested as per the Bureau of Indian Standards (IS: 1060 (part-I)-1966). The paper boards made with more arecanut sheath materials...

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