Język Polski
English
Published
: 2022-09-18
Mechanical and rheological properties of polyethylene compositions with vegetable fibres
Abstract
Two varieties of low-density polyethylene (PE-LD) with differing molecular weights were filled with short cotton and flax fibers (10-30%). The systems without or with (2%) compatibilizer (mixture of glycerol monoethers with C-12-C-14 alkohols) were homogenized using a laboratory two-roll-mill. The effects of PE-LD variety, fiber length (ca. 1-2 mm) and content, and manner of adding the compatibilizer on mechanical and heological properties were investigated. It was found that the compatibilizer addition improves the blend homogeneity, but at the same time deteriorates mechanical properties and lowers the viscosity. Increase in fiber length improves mechanical properties as observed for compositions of PE-LD variety with higher molecular weight. Higher fiber content increases viscosity of the composition and intensifies its non-Newtonian behavior resulting in lowering of the n exponent value in power law equation (1). The blend composition does not have any significant effect on flow activation energy (150degreesC-180degreesC, cutting speed 100s(-1)).
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Zasady cytowania
Steller, R., & Meissner, W. (2022). Mechanical and rheological properties of polyethylene compositions with vegetable fibres. Polimery, 47(5), 332–338. Retrieved from https://polimery.ichp.vot.pl/index.php/p/article/view/1978
