Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/34776
Título: | The effect of holding pressure on the shrinkage and birefringence of injection moulded polypropylene plates |
Autor(es): | Pontes, A. J. Oliveira, M. Pouzada, A. S. |
Palavras-chave: | Injection moulding Shrinkage Birefringence Polypropylene |
Data: | 2004 |
Editora: | Trans Tech Publications |
Revista: | Materials Science Forum |
Citação: | Pontes, A. J., Oliveira, M. J., & Pouzada, A. S. (2004, May 15). The Effect of Holding Pressure on the Shrinkage and Birefringence of Injection Moulded Polypropylene Plates. Materials Science Forum. Trans Tech Publications, Ltd. http://doi.org/10.4028/www.scientific.net/msf.455-456.814 |
Resumo(s): | This paper shows the results of shrinkage and birefringence of injection moulded plates. The study was done with two polypropylenes with different MFI. Focus is made on the effect of the holding pressure on the experimental as-moulded shrinkage and birefringence in the flow direction. The mouldings are edge gated flat rectangular plate. The moulding process was continuously monitored with pressure transducers. The results show that the rise of holding pressure determines the decrease of the shrinkage. Also, it was observed that the increase of the pressure applied during the holding phase and the associated flow induce re-orientation of the melt, especially in the case of higher molecular weight PP. Consequently, an increase in the birefringence results. |
Tipo: | Artigo em ata de conferência |
URI: | https://hdl.handle.net/1822/34776 |
ISBN: | 0878499415 |
DOI: | 10.4028/www.scientific.net/MSF.455-456.814 |
ISSN: | 0255-5476 |
Versão da editora: | https://www.scientific.net/MSF.455-456.814 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | IPC - Artigos em revistas científicas internacionais com arbitragem |