<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Fernandes, Emanuel M.</style></author><author><style face="normal" font="default" size="100%">Aroso, Ivo M.</style></author><author><style face="normal" font="default" size="100%">Mano, João F.</style></author><author><style face="normal" font="default" size="100%">Covas, José A.</style></author><author><style face="normal" font="default" size="100%">Reis, Rui L.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Functionalized cork-polymer composites (CPC) by reactive extrusion using suberin and lignin from cork as coupling agents</style></title><secondary-title><style face="normal" font="default" size="100%">Composites Part B: Engineering</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Coupling agent</style></keyword><keyword><style  face="normal" font="default" size="100%">Electron microscopy</style></keyword><keyword><style  face="normal" font="default" size="100%">Extrusion</style></keyword><keyword><style  face="normal" font="default" size="100%">Fibre/matrix bond</style></keyword><keyword><style  face="normal" font="default" size="100%">Polymer-matrix composites (PMCs)</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2014</style></year><pub-dates><date><style  face="normal" font="default" size="100%">2014///</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://www.sciencedirect.com/science/article/pii/S1359836814003084</style></url></web-urls></urls><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">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 characterized 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.</style></abstract></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Fernandes, Emanuel M.</style></author><author><style face="normal" font="default" size="100%">Mano, João F.</style></author><author><style face="normal" font="default" size="100%">Reis, Rui L.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Hybrid cork–polymer composites containing sisal fibre: Morphology, effect of the fibre treatment on the mechanical properties and tensile failure prediction</style></title><secondary-title><style face="normal" font="default" size="100%">Composite Structures</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Cork</style></keyword><keyword><style  face="normal" font="default" size="100%">Extrusion</style></keyword><keyword><style  face="normal" font="default" size="100%">Fibre reinforced plastic</style></keyword><keyword><style  face="normal" font="default" size="100%">Hybrid composites</style></keyword><keyword><style  face="normal" font="default" size="100%">Mechanical behaviour</style></keyword><keyword><style  face="normal" font="default" size="100%">Polymer–matrix composites (PMCs)</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2013</style></year><pub-dates><date><style  face="normal" font="default" size="100%">2013///</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://www.sciencedirect.com/science/article/pii/S0263822313002225</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">105</style></volume><pages><style face="normal" font="default" size="100%">153 - 162</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">In this study, we investigated the use of short sisal fibre with and without polyethylene-graft-maleic anhydride (PE-g-MA) as a strategy to reinforce cork–polymer composite (CPC) materials. The use of alkali treatment of sisal to improve fibre–matrix adhesion was evaluated. High density polyethylene (HDPE) was used as matrix and the composites were produced in a two-step process using twin-screw extruder followed by compression moulding. FTIR, TGA and XRD were used to confirm the sisal fibre modification. Additionally, morphology, density, diameter and tensile properties of the fibres were evaluated before processing. The hybrid composites containing cork powder (40 wt.%) and randomly distributed sisal fibres were evaluated in terms of morphology and mechanical properties. The use of a 10 wt.% sisal fibre in the presence of a 2 wt.% coupling agent based on maleic anhydride, has shown to improve the tensile and flexural properties of the composites. The higher mechanical properties were achieved by using alkali treated sisal fibres and PE-g-MA. In the presence of the coupling agent the composite morphology revealed good interfacial adhesion between the natural components and the polypropylene matrix, being in accordance with the mechanical results. Weibull cumulative distribution was successfully used to accurately predict the tensile strength failure of the hybrid CPC materials.</style></abstract></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Fernandes, Emanuel M.</style></author><author><style face="normal" font="default" size="100%">Correlo, Vitor M.</style></author><author><style face="normal" font="default" size="100%">a. M. Chagas, José</style></author><author><style face="normal" font="default" size="100%">Mano, João F.</style></author><author><style face="normal" font="default" size="100%">Reis, Rui L.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Cork based composites using polyolefin’s as matrix: Morphology and mechanical performance</style></title><secondary-title><style face="normal" font="default" size="100%">Composites Science and Technology</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">cork and thermoplastic</style></keyword><keyword><style  face="normal" font="default" size="100%">Coupling agents</style></keyword><keyword><style  face="normal" font="default" size="100%">mechanical properties</style></keyword><keyword><style  face="normal" font="default" size="100%">Pultrusion</style></keyword><keyword><style  face="normal" font="default" size="100%">thermal properties</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2010</style></year><pub-dates><date><style  face="normal" font="default" size="100%">2010///</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://linkinghub.elsevier.com/retrieve/pii/S0266353810003672</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">70</style></volume><pages><style face="normal" font="default" size="100%">2310 - 2318</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">The cork industry produces high amounts of cork powders resulting from the ﬁnal stages of cork processing or resulting from existing cork products. Usually these powders are burned and served to boilers in industrial processes. The main goal of this work is to transform this cork sub-product into a highly value composite product. The real value is dependent on the mechanical performance of this product. Thus the mixture between cork and thermoplastics, particularly the improvement of interfacial bonding, is an important topic, which needs to be developed. The interfacial afﬁnity can be greatly increased, applying superﬁcial modiﬁcation of one of the components, or by the use of coupling agents. In this work, a high amount of cork powder (50 wt.%) from different origins combined with different thermoplastic materials using melt based processes has been examined. Pultrusion was used to produce pellets and compression moulding to obtain boards to determine its properties. Coupling agents based on maleic anhydride (2 wt.%) improved the tensile strength successfully, while the cork powder has an a important role in the stiffness. The morphology of the surface fractures indicated a good dispersion of the cork and a good adhesion between both phases. Thermal properties of the composites disclosed a nucleating effect promoted by cork</style></abstract><issue><style face="normal" font="default" size="100%">16</style></issue><notes><style face="normal" font="default" size="100%">The following values have no corresponding Zotero field:&lt;br/&gt;publisher: Elsevier Ltd</style></notes></record></records></xml>