Evaluation of the Resistance of a Polypropylene Geotextile Against Ultraviolet Radiation

• Tipo: Artigo em Revista Científica Internacional
• Data: 2019-06-19

Autores

Maria de Lurdes Lopes (Autor) FEUP; José Ricardo Carneiro (Autor) FEUP; Paulo Joaquim Almeida (Autor) Outra

Revista

Título: Microscopy and Microanalysis

Vol. 25

Páginas: 196-202

ISSN: 1431-9276

Editora: Cambridge University Press

Indexação

ISI Web of Knowledge - 10 Citações

Scopus - 10 Citações

Classificação Científica

CORDIS: Ciências Tecnológicas

FOS: Ciências da engenharia e tecnologias

Projetos Associados

GeoSynergism - Avaliação de Efeitos Sinérgicos na Degradação de Geossintéticos (GeoSinergismo)

Outras Informações

ID Authenticus: P-00Q-D6N

DOI: 10.1017/s1431927618000430

Abstract (EN): The exposure to solar radiation (mainly due to the action of ultraviolet radiation) is one of the main causes for the premature failure of many polymeric materials, including the geotextiles. In this work, a nonwoven polypropylene geotextile (stabilized with a known amount of a hindered amine light stabilizer) was exposed to ultraviolet-aging tests, both in the laboratory (accelerated conditions) and outdoors (natural conditions). The damage occurred in the geotextile (caused by the ultraviolet-aging tests) was evaluated quantitatively (by monitoring changes in its mass per unit area, thickness, and tensile properties) and qualitatively (by scanning electron microscopy). The results, among other findings, showed that: (1) the ultraviolet-aging tests (both in the laboratory and outdoors) induced relevant damage in the polypropylene fibers of the geotextile (transverse cracks), leading to the deterioration of its tensile behavior, (2) the amount of degradation increased with the increase of the ultraviolet radiant energy, (3) the laboratory tests caused a faster deterioration of the polypropylene fibers than the outdoor tests, and (4) the degradation found by scanning electron microscopy in the polypropylene fibers correlated well with the deterioration occurred in the tensile behavior of the geotextile.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 7