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TitleFunctionalized cork-polymer composites (CPC) by reactive extrusion using suberin and lignin from cork as coupling agents
Author(s)Fernandes, E. M.
Aroso, Ivo Manuel Ascensão
Mano, J. F.
Covas, J. A.
Reis, R. L.
Cork composite
Coupling agent
Electron microscopy
Fibre/matrix bond
Polymer–matrix composites (PMCs)
A. Polymer-matrix composites (PMCs)
B. Fibre/matrix bond
D. Electron microscopy
E. Extrusion
Issue dateNov-2014
JournalComposites Part B: Engineering
Abstract(s)High density polyethylene (HDPE) and cork powder were compounded in a co-rotating twin-screw extruder to obtain cork-polymer composites (CPC) with improved properties. Benzoyl peroxide (BPO) was used as initiator agent, and suberin or lignin isolated from cork enhanced filler-matrix bonding and promoted mechanical reinforcement with environmental benefits. The novel composites were characterised in terms of dimensional stability, evolution of morphology, thermal and mechanical properties and their performance was compared with that of composites containing polyethylene-grafted maleic anhydride (PE-g-MA) as coupling agent. As expected, composites with coupling agent present higher mechanical properties, lower water uptake and thickness swelling variation. Suberin acts as plasticizer with antioxidant benefits, while lignin works as a coupling agent, improving tensile modulus and maximum strength. Increasing lignin content does not improve the mechanical properties but improves thermal stability.
Publisher version
AccessOpen access
Appears in Collections:3B’s - Artigos em revistas/Papers in scientific journals
IPC - Artigos em revistas científicas internacionais com arbitragem

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