Effects of natural rubber blends on mechanical properties of polylactic acid

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

Effects of natural rubber blends on mechanical properties of polylactic acid

Popis výsledku v původním jazyce

Polylactic acid (PLA) has gained significant interest because of its biodegradable properties. However, a relatively high glass transition temperature of 58 °C makes the material brittle and thus limits its application. Furthermore, PLA polymers have very low crystallinity, as PLA crystallization proceeds extremely slowly. To overcome these weaknesses the modification of PLA needs to be considered. This paper is focused on an approach to improve the mechanical properties of PLA by melt-blending with natural rubber (NR). As a part of this study, a series of PLA/NR samples at various compositions were prepared. Subsequently, the effect of natural rubber on polylactic acid was evaluated in terms of mechanical properties. The thermal properties of the sample were measured by the differential scanning calorimetry method. The tensile test investigated properties such as tensile stress, elongation at break, and tensile modulus. The amount of energy absorbed by a material during fracture was measured by the Charpy impact test, and the resistance of a material to the penetration of a needle was examined by the Shore D hardness test.

Název v anglickém jazyce

Effects of natural rubber blends on mechanical properties of polylactic acid

Popis výsledku anglicky

Polylactic acid (PLA) has gained significant interest because of its biodegradable properties. However, a relatively high glass transition temperature of 58 °C makes the material brittle and thus limits its application. Furthermore, PLA polymers have very low crystallinity, as PLA crystallization proceeds extremely slowly. To overcome these weaknesses the modification of PLA needs to be considered. This paper is focused on an approach to improve the mechanical properties of PLA by melt-blending with natural rubber (NR). As a part of this study, a series of PLA/NR samples at various compositions were prepared. Subsequently, the effect of natural rubber on polylactic acid was evaluated in terms of mechanical properties. The thermal properties of the sample were measured by the differential scanning calorimetry method. The tensile test investigated properties such as tensile stress, elongation at break, and tensile modulus. The amount of energy absorbed by a material during fracture was measured by the Charpy impact test, and the resistance of a material to the penetration of a needle was examined by the Shore D hardness test.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

10404 - Polymer science

Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2022

Kód důvěrnosti údajů

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