Investigation of the graft length impact on the interfacial toughness in a cellulose/poly(ε-caprolactone) bilayer laminate
2011 (English)In: Composites Science And Technology, ISSN 0266-3538, Vol. 71, no 1, 9-12 p.Article in journal (Refereed) Published
Interfacial adhesion between immiscible cellulose–polymer interfaces is a crucial property for fibrous biocomposites. To tailor the interfacial adhesion, the grafting of polymers from cellulose films was studied using ring-opening polymerization of ε-caprolactone. The poly(ε-caprolactone) (PCL) grafted cellulose was analyzed with FTIR, AFM and via water CA measurements. The graft length was varied by the addition of a free initiator, enabling tailoring of the interfacial toughness. Films of microfibrillated cellulose were grafted with PCL and hot-pressed together with a PCL-film to form a bilayer laminate. Interfacial peeling toughness correlates very strongly with PCL degree of polymerization (DP). PCL grafts form physical entanglements in the PCL matrix and promote significant plastic deformation in the PCL bulk, thus increasing interfacial peeling energy.
Place, publisher, year, edition, pages
2011. Vol. 71, no 1, 9-12 p.
Microfibrillated cellulose grafted with polycaprolactone, Polymer-matrix composites, Laminate, Wood, Interfacial strength, Delamination
IdentifiersURN: urn:nbn:se:kth:diva-13493DOI: 10.1016/j.compscitech.2010.09.007ISI: 000285904100002ScopusID: 2-s2.0-78649690669OAI: oai:DiVA.org:kth-13493DiVA: diva2:325847
QC 20120328. Updated from submitted to published. Previous title: "Investigation of the Grafta Cellulose/Poly(‐Length Impact on the Interfacial Toughness ina Cellolose/Poly(ε‐caprolactone) Bilayer Laminate"2010-06-212010-06-212012-03-28Bibliographically approved