Strain-induced crystallisation in natural rubber: a thermodynamically consistent model of the material behaviour using a serial connection of phases

Loos, Klara; Aydogdu, Ahmet B.; Lion, Alexander; Johlitz, Michael; Calipel, J.

doi:10.1007/s00161-020-00950-9

Cited by 7 publications

(4 citation statements)

References 55 publications

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“…The strain-induced crystallization phenomenon in cross-linked natural rubber (NR), discovered in 1925 but widely discussed in the literature [ 28 , 29 , 30 , 31 ], explains the high values of the stress at rupture and the maximum extensibility. This important characteristic attributed to the uniform microstructure of NR (cis configuration of the macromolecular chains), may be regarded as a “self-reinforcing effect”.…”

Section: Orientation Of Homopolymers Semi-crystalline Polymers Copoly...mentioning

confidence: 99%

Infrared Linear Dichroism for the Analysis of Molecular Orientation in Polymers and in Polymer Composites

Bokobza

2022

Polymers

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The mechanical properties of polymeric materials are strongly affected by molecular orientation occurring under processing conditions. Infrared dichroism is particularly well suited for characterizing polymer chain orientation at a molecular level. The usefulness of this technique has been demonstrated through various applications in homopolymers, semi-crystalline polymers, copolymers, polymer blends, as well as in polymer composites. Determination of molecular orientation can be carried out in the mid- and near-infrared ranges and very small dichroic effects can be detected with the use of a photoelastic modulator. Chain orientation in polymer composites is seen to increase with the filler content in the case of a strong interface between the two phases, making possible a quantification of the degree of bonding between the host polymeric matrix and the incorporated inclusions.

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Section: Orientation Of Homopolymers Semi-crystalline Polymers Copoly...mentioning

confidence: 99%

Infrared Linear Dichroism for the Analysis of Molecular Orientation in Polymers and in Polymer Composites

Bokobza

2022

Polymers

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“…An alternate methodology for the process of developing Isolators leverages a characteristic of natural rubber known as strain-induced crystallization [69]. The process of crystallization has the ability to take place in a broad range of natural rubber combinations, but the shear strain essential for crystallization (generally 100% or higher) depends on combining and filler content.…”

Section: Guidelines and Development Of Modern Isolatorsmentioning

confidence: 99%

Advancements in base isolation for seismic mitigation: Perspectives on elastomeric and lead rubber bearings

Patel,

Mourya,

Pandey

et al. 2024

Res. Eng. Struct. Mat.

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Base isolation represents an environmentally sustainable and highly effective technique for mitigating structural responses to strong seismic forces generated by plate boundary tectonic activities. Its primary benefits include preventing structural collapse, minimizing property damage, and safeguarding human lives during severe earthquakes. This passive, energy-efficient approach is often complemented by supplementary dampers to further reduce seismic impact. This study provides a comprehensive overview of elastomeric and lead rubber isolators, covering their theoretical, experimental, and numerical aspects. The paper examines the seismic response of structures equipped with elastomeric and lead rubber bearings, including a discussion of their pros and cons. This paper presents the comparison of fixed base and rubber isolated base in SAP 2000 to assess the effectiveness of base isolation. Additionally, it presents findings from shaking table tests, relevant building codes, and practical applications, considering the impact of events beyond initial design parameters. The review delves into the historical evolution of elastomeric and lead rubber-bearing systems, offering valuable insights into their contemporary understanding. Furthermore, the paper introduces three-dimensional isolators designed to attenuate ground motion responses in both horizontal and vertical directions. It investigates the effects of soil-structure interaction and evaluates isolator responses under blast and impact aircraft loading conditions. Notably, specific types of bearings exhibit exceptional energy dissipation capabilities during catastrophic seismic events, leading to reduced floor acceleration and inter-storey sway at critical levels. In conclusion, the study offers future recommendations and identifies potential constraints in this field

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“…The first one is strain-induced crystallisation. High deformations result in a change of molecular orientation of its network, whereas the induced crystallites slow down the crack growth [29]. The second phenomenon is the ability to crystallise in the un-stretched state in the lowered temperatures, the so-called thermally induced crystallisation (TIC).…”

Section: Fig 5 Example Of the Specimen During The Tensile Test At 50cmentioning

confidence: 99%

Properties of Rubber-Like Materials and their Blends in Wide Range of Temperatures – Experimental and Numerical Study

Konarzewski

Stankiewicz

Sarzynski

et al. 2023

Acta Mechanica Et Automatica

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Elastomers are widely used in many industries. Their use requires thorough knowledge of their strength and stiffness parameters over a wide temperature range. However, determination of the parameters of such materials is still a challenge. Therefore, the paper presents research methodology allowing determination of the properties of rubber-like materials in a wide range of stretch and temperatures (from +50°C to −25°C) by using the example of styrene-butadiene rubber (SBR) and natural rubber (NR) elastomers. Additionally, two blends, chloroprene rubber/nitrile-butadiene rubber (CR/NBR) and NR/SBR blends, were also considered. Based on physical premises, a polynomial and Arruda–Boyce hyperelastic constitutive models parameters were determined using two different methods, namely curve-fitting and the successive response surface method.

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Strain-induced crystallisation in natural rubber: a thermodynamically consistent model of the material behaviour using a serial connection of phases

Cited by 7 publications

References 55 publications

Infrared Linear Dichroism for the Analysis of Molecular Orientation in Polymers and in Polymer Composites

Infrared Linear Dichroism for the Analysis of Molecular Orientation in Polymers and in Polymer Composites

Advancements in base isolation for seismic mitigation: Perspectives on elastomeric and lead rubber bearings

Properties of Rubber-Like Materials and their Blends in Wide Range of Temperatures – Experimental and Numerical Study

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