A detailed study of the effect of cyclic loading on the thermal expansion coefficient of reinforced styrene-butadiene rubber as a function of different carbon black types

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28610%2F24%3A63588838" target="_blank" >RIV/70883521:28610/24:63588838 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

A detailed study of the effect of cyclic loading on the thermal expansion coefficient of reinforced styrene-butadiene rubber as a function of different carbon black types

Popis výsledku v původním jazyce

The fact that heat is generated in viscoelastic materials such as rubber by the gradual dissipation of energy under cyclic loading is well known as self-heating. ln addition, rubber components are reinforced with various typ es of fillers, the most commonly u sed of which are carbon black (CB), which significantly affect the viscoelastic properties and therefore the heat development. lt must also be taken into account, that in real applications the rubber is exposed to different ambient temperature conditions. ln addition, fatigue degradation of the rubber matrix occurs under cyclic loading. The temperature effect, whether by ambient or self-heating or a combination of both, causes thermal expansion and directly affects the dimensional stability of the rubber component, which can affect both the accuracy and functionality of the application and, in particular, the life of the rubber product. The coefficient of thermal expansion (CTE) is then a physical parameter used to determine the rate of expansion of the material as a function of temperature and describes the key properties of the rubber in this respect. The CTE then determines whether damage to the rubber can occur due to thermal stress. Therefore, knowledge of the CTE is a prerequisite for selecting the right material for individua I applications and thus ensuring its faultless functionality.This work is the first to investigate the effect of different types and amounts of CB in styrenebutadiene rubber (SBR) on CTE as a function of cyclic loading. Considering the necessity of high accuracy of CTE determination to capture the effect of bond breaking in the filler-filler interaction, a completely new unique measurement methodology was developed as well as an experimental device was exclusively designed for the determination of CTE in rub ber. Both the methodology and the testing device will be presented for the first time and the principie discussed in detail in the context of this study. As conclusion, the dependence of CTE on the type and amount of CB will first be discussed, with the most significant part of the final discussion being the presentation of the relationship of cyclic loading in the Payne effect region to CTE. The resulting relationships and values thus form a unique set describing the thermal properties of SBR reinforced with different type of CB in relation to the applied cyclic loading.

Název v anglickém jazyce

A detailed study of the effect of cyclic loading on the thermal expansion coefficient of reinforced styrene-butadiene rubber as a function of different carbon black types

Popis výsledku anglicky

The fact that heat is generated in viscoelastic materials such as rubber by the gradual dissipation of energy under cyclic loading is well known as self-heating. ln addition, rubber components are reinforced with various typ es of fillers, the most commonly u sed of which are carbon black (CB), which significantly affect the viscoelastic properties and therefore the heat development. lt must also be taken into account, that in real applications the rubber is exposed to different ambient temperature conditions. ln addition, fatigue degradation of the rubber matrix occurs under cyclic loading. The temperature effect, whether by ambient or self-heating or a combination of both, causes thermal expansion and directly affects the dimensional stability of the rubber component, which can affect both the accuracy and functionality of the application and, in particular, the life of the rubber product. The coefficient of thermal expansion (CTE) is then a physical parameter used to determine the rate of expansion of the material as a function of temperature and describes the key properties of the rubber in this respect. The CTE then determines whether damage to the rubber can occur due to thermal stress. Therefore, knowledge of the CTE is a prerequisite for selecting the right material for individua I applications and thus ensuring its faultless functionality.This work is the first to investigate the effect of different types and amounts of CB in styrenebutadiene rubber (SBR) on CTE as a function of cyclic loading. Considering the necessity of high accuracy of CTE determination to capture the effect of bond breaking in the filler-filler interaction, a completely new unique measurement methodology was developed as well as an experimental device was exclusively designed for the determination of CTE in rub ber. Both the methodology and the testing device will be presented for the first time and the principie discussed in detail in the context of this study. As conclusion, the dependence of CTE on the type and amount of CB will first be discussed, with the most significant part of the final discussion being the presentation of the relationship of cyclic loading in the Payne effect region to CTE. The resulting relationships and values thus form a unique set describing the thermal properties of SBR reinforced with different type of CB in relation to the applied cyclic loading.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

20501 - Materials engineering

Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů