Título:	The influence of fiber size on the behavior of the araucaria pine nut shell/PU composite.
Autoria:	PROTZEK, G. R. MAGALHAES, W. L. E. BITTENCOURT, P. R. S. CLARO NETO, S. VILLANOVA, R. L. AZEVEDO, E. C.
Afiliação:	Giuliana Ribeiro Protzek, Programa de Pós-graduação da UTFPR; WASHINGTON LUIZ ESTEVES MAGALHAES, CNPF; Paulo Rodrigo Stival Bittencourt, UTFPR; Salvador Claro Neto, USP; Rodrigo Lupinacci Villanova, UTFPR; Elaine Cristina Azevedo, Programa de Pós-graduação da UTFPR.
Ano de publicação:	2019
Referência:	Polímeros: Ciência e Tecnologia, v. 29, n. 2, e2019025, 2019. 9 p.
Conteúdo:	The use of araucaria pine nut shell in polymer composites may increase the pine nut value and help protec araucaria (Araucaria angustifolia) itself, which is an endangered species. The aim of this work is to study the influence of the size of pine nut shell fiber on the mechanical properties of composites made of this shell and polyurethane derived from castor oil. Composites with different polyurethane contents were manufactured with dried untreated pine nut shell sieved through 30 and 50 mesh sieves (0.6 and 0.3 mm, respectively). Composites were shaped by mechanical mixing of the components followed by hot pressing. Properties such as density, water absorption, and flexural strength were measured. Specimens were also characterized by SEM, FTIR, and TGA. The flexural strength of PU/0.3mm pine nut shell composites with 30% PU (wt%) was 57.7 MPa, and their water absorption was 7.37% after 24 hours of immersion
NAL Thesaurus:	Castor oil Polyurethanes Mechanical properties
Palavras-chave:	Araucaria pine nut shell Composite Poliuretano Compósito Casca de pinhão
Digital Object Identifier:	10.1590/0104-1428.01218
Tipo do material:	Artigo de periódico
Acesso:	openAccess
Aparece nas coleções:	Artigo em periódico indexado (CNPF)