Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/25079
Título: | Structure–properties relationship in single polymer composites based on polyamide 6 prepared by in-mold anionic polymerization |
Autor(es): | Dencheva, Nadya Vasileva Denchev, Z. Pouzada, A. S. Sampaio, Ana Sofia Rocha, A. M. |
Palavras-chave: | Anionic polymerization Single-polymer composites Mechanical properties Polymorph transitions in polyamides X-ray scattering Structure-properties relationship |
Data: | 2013 |
Editora: | Springer |
Revista: | Journal of materials science |
Resumo(s): | Single polymer composites (SPCs) based on polyamide 6 (PA6) were prepared by in-mold activated anionic ring-opening polymerization (AAROP) of capro- lactam in the presence of PA6 textile fibers. The influence of the reinforcing fibers content, their surface treatment, as well as of the temperature of AAROP upon the morphol- ogy, crystalline structure, and mechanical properties of the resulting SPCs was followed. The presence of oriented transcrystalline layer (TCL) on the surface of the rein- forcing fibers was demonstrated by means of microscopy methods. Its orientation and polymorph structure were determined by synchrotron wide-angle X-ray scattering. Studies on the mechanical behavior in tension of the SPCs showed a well-expressed growth of the stress at break (70–80 %) and deformation at break (up to 150–190 %) in composites with 15–20 wt% of reinforcements. The best mechanical properties were found in SPCs whose rein- forcing fibers were solvent-pretreated prior to AAROP in order to remove the original finish. In these samples a stronger adhesion at the fiber/matrix interface was proved by scanning electron microscopy of cryofractured samples. This effect was related to a thinner TCL in which the α-to-γ polymorph transition is impeded. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/25079 |
DOI: | 10.1007/s10853-013-7546-8 |
ISSN: | 0022-2461 1573-4803 |
Versão da editora: | http://link.springer.com/article/10.1007/s10853-013-7546-8 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | IPC - Artigos em revistas científicas internacionais com arbitragem |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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SPC paper_2013.pdf | Main document | 1,99 MB | Adobe PDF | Ver/Abrir |