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Title Enhanced interfacial shear strength and critical energy release rate in single glass fiber-crosslinked polypropylene model microcomposites
Date 15.12.2018
Number 56172
Abstract Continuous glass fiber-reinforced polypropylene composites produced by using hybrid yarns show reduced fiber-to-matrix adhesion in comparison to their thermosetting counterparts. Their consolidation involves no curing, and the chemical reactions are limited to the glass fiber surface, the silane coupling agent, and the maleic anhydride-grafted polypropylene. This paper investigates the impact of electron beam crosslinkable toughened polypropylene, alkylene-functionalized single glass fibers, and electron-induced grafting and crosslinking on the local interfacial shear strength and critical energy release rate in single glass fiber polypropylene model microcomposites. A systematic comparison of non-, amino-, alkyl-, and alkylene-functionalized single fibers in virgin, crosslinkable toughened and electron beam crosslinked toughened polypropylene was done in order to study their influence on the local interfacial strength parameters. In comparison to amino-functionalized single glass fibers in polypropylene/maleic anhydride-grafted polypropylene, an enhanced local interfacial shear strength (+20%) and critical energy release rate (+80%) were observed for alkylene-functionalized single glass fibers in electron beam crosslinked toughened polypropylene.
Publisher Materials (Open Access)
Identifier
Citation Materials (Open Access) 11 (2018) ID2552
DOI https://doi.org/10.3390/ma11122552
Authors Gohs, U. ; Müller, M. T. ; Zschech, C. ; Zhandarov, S.
Tags single fiber pull-out test local interfacial shear strength high energy electrons crosslinked toughened polypropylene glass fiber model microcomposites

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