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Title: Improving the extensional rheological properties and foamability of HDPE by means of chemical crosslinking
Authors: Laguna Gutiérrez, Ester
Pinto, Javier
Kumar, Vipin
Rodríguez Méndez, María Luz
Rodríguez Pérez, Miguel Angel
Issue Date: 2016
Publisher: SAGE Journals
Description: Producción Científica
Citation: Journal of Cellular Plastics, 2016, 0 (0), p. 1-25
Abstract: Obtaining high-density polyethylene-based microcellular foams is a topic of interest due to the synergistic properties that can be obtained by the fact of achieving a microcellular structure using a polymer with a high number of interesting properties. However, due to the high crystallinity of this polymer, the production of low-density microcellular foams, by a physical foaming process, is not a simple task. In this work, the proposed solution to produce these materials is based on using crosslinked high-density polyethylenes. By crosslinking the polymer matrix, it is possible to increase the amount of gas available for foaming and also to improve the extensional rheological properties. In addition, the foaming time and the foaming temperature have also been modified with the aim of analyzing and understanding the mechanisms taking place during the foaming process to finally obtain cellular materials with low densities and improved cellular structures. The results indicate that cellular materials with relative densities of 0.37 and with cell sizes of approximately 2 µm can be produced from crosslinked high-density polyethylene using the appropriate crosslinking degree and foaming parameters.
Classification: Crosslinked foams
physical foaming
cell growth
foam density
thermoplastic foams
extensional rheology
Peer Review: SI
DOI: 10.1177/0021955X16681454
Sponsor: PIRTU contract of E. Laguna-Gutierrez by Junta of Castile and Leon (EDU/289/2011) and co-financed by the European Social Fund.
MINECO and FEDER program (MAT 2012-34901).
MINECO, FEDER, European Union (EU) (MAT2015-69234-R).
Junta de Castile and Leon (VA035U13).
Language: eng
Rights: info:eu-repo/semantics/embargoedAccess
Appears in Collections:DEP63 - Artículos de revista

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