The effect of apparent cross-link density on Cut and Chip wear in natural rubber

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

The effect of apparent cross-link density on Cut and Chip wear in natural rubber

Popis výsledku v původním jazyce

Natural rubber (NR) is a polymer that at certain stress levels undergoes strain induced crystallization (SIC) which contributes to increased resistance to cut and chip (CC) wear when exposed to harsh conditions. This unique property of NR is dependent on several factors, including the processing conditions, the cross-linking system and the type of used additives. These factors subsequently result in variations of apparent cross-linking density (CLD) of the cross-linked CB filled rubber. Therefore, this study focuses on the systematic investigation of CC wear phenomena as a function of CLDs represented by conventional (CV), semi-efficient (SEV) and efficient (EV) cross-linking systems for variations of loading conditions. Rubber samples based on different cross-linking systems were prepared by varying the concentration of the accelerator N-tertiarybutyl-2-benzothiazole sulfenamide (TBBS) at a constant concentration of 2.5 phr sulphur as cross-linking agent. Study showed increased NR resistance to CC wear using the CV system, i.e. in the region of (136-241 µmol x cm-3), when exposed to higher loading conditions. Furthermore, a significant influence of SIC on CC resistance was confirmed in the range of CLD from 181 to 241 µmol x cm-3. The findings suggest a positive effect of conventional cross-linking system on the resistance to CC wear of natural rubber-based products as are tyres or conveyor belts exposed to harsh operation conditions.

Název v anglickém jazyce

The effect of apparent cross-link density on Cut and Chip wear in natural rubber

Popis výsledku anglicky

Natural rubber (NR) is a polymer that at certain stress levels undergoes strain induced crystallization (SIC) which contributes to increased resistance to cut and chip (CC) wear when exposed to harsh conditions. This unique property of NR is dependent on several factors, including the processing conditions, the cross-linking system and the type of used additives. These factors subsequently result in variations of apparent cross-linking density (CLD) of the cross-linked CB filled rubber. Therefore, this study focuses on the systematic investigation of CC wear phenomena as a function of CLDs represented by conventional (CV), semi-efficient (SEV) and efficient (EV) cross-linking systems for variations of loading conditions. Rubber samples based on different cross-linking systems were prepared by varying the concentration of the accelerator N-tertiarybutyl-2-benzothiazole sulfenamide (TBBS) at a constant concentration of 2.5 phr sulphur as cross-linking agent. Study showed increased NR resistance to CC wear using the CV system, i.e. in the region of (136-241 µmol x cm-3), when exposed to higher loading conditions. Furthermore, a significant influence of SIC on CC resistance was confirmed in the range of CLD from 181 to 241 µmol x cm-3. The findings suggest a positive effect of conventional cross-linking system on the resistance to CC wear of natural rubber-based products as are tyres or conveyor belts exposed to harsh operation conditions.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

20501 - Materials engineering

Projekt

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Návaznosti

V - Vyzkumna aktivita podporovana z jinych verejnych zdroju

Rok uplatnění

2023

Kód důvěrnosti údajů

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