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Evaluation of Coastal Scenery in Urban Beach: Torres, Rio Grande do Sul, Brazil

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Evaluation of Coastal Scenery in Urban Beach: Torres, Rio Grande do Sul, Brazil

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Título Evaluation of Coastal Scenery in Urban Beach: Torres, Rio Grande do Sul, Brazil
Autor Cristiano, Samanta da Costa
Rockett, Gabriela Camboim
Portz, Luana Carla
Anfuso, Giorgio
Gruber, Nelson Luiz Sambaqui
Williams, Allan T.
Abstract Two polyethylene-based on single-site metallocene catalyst (mLLDPE) were selected to characterize the effect of long chain branching (LCB) on blown film processability, optical and mechanical properties. 13C NMR and parallel plate rheology were used to identify LCB presence on LLDPEs. Blown films were produced from 100% LLDPEs using three different machine direction (MD) stretch ratios. When the same processing conditions for the two LLDPEs grades were used, better processability was observed for LLDPE with LCB. In relation to mechanical and physical properties, Elmendorf tear and optical properties were highly influenced by the presence of LCB. Tear resistance is affected by film orientation and is inversely proportional to the level of LCB in the polymer. It was observed a reduction of 50% in the MD tear strength when comparing with the polymer without LCB. However, haze decreases significantly with the presence of LCB, about 40%.
Contido em Revista Gestão Costeira Integrada=Journal of Integrated Coastal Zone Management. Lisboa : Associação Portuguesa dos Recursos Hídricos, 2014. Vol. 16, n.1 (mar. 2016), p. 71-78
Assunto Gerenciamento costeiro
Paisagem litorânea
[en] LLDPE
[en] Mechanical properties
[en] Metallocene
[en] NMR
[en] Ong chain branchingl
[en] Rheology
Origem Estrangeiro
Tipo Artigo de periódico
URI http://hdl.handle.net/10183/140648
Arquivos Descrição Formato
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