elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Privacy Policy | Contact | Deutsch
Fontsize: [-] Text [+]

Powder binders used for the manufacturing of wind turbine rotor blades. Part 1: Characterisation of resin-binder interaction and preform properties

Schmidt, Stefan and Mahrholz, Thorsten and Kühn, Alexandra and Wierach, Peter (2018) Powder binders used for the manufacturing of wind turbine rotor blades. Part 1: Characterisation of resin-binder interaction and preform properties. Polymer Composites, 39 (3), pp. 708-717. Wiley. doi: 10.1002/pc.23988. ISSN 0272-8397.

Full text not available from this repository.

Abstract

Glass fibre reinforced plastics (GFRP) are the predominant materials used for wind turbine ro-tor blades. To manufacture blades in a vacuum-assisted resin infusion process (VARI), a binder is needed for fibre fixation and preform stability. Moreover, solubility and mechanical compatibility of the binder and the epoxy resin matrix are important parameters for processa-bility and the mechanical properties of the composite. The present study therefore character-ised and evaluated five chemically different binders with regard to their solubility in a rotor-blade-proven epoxy resin using microscopy, viscometry and differential scanning calorimetry (DSC). The solubility tests enabled a binder-classification into critically soluble (KE-60, Epikote 05390), strongly soluble (Grilon MS), partially soluble (D 2433E), and non-soluble (K-140) binder types. In subsequent mechanical and thermo-mechanical testing of resin-binder plates, the strongly soluble binder Grilon MS showed the best performance, followed by the non-soluble binder K-140 and the partially soluble binder D 2433E. These results suggest that binders developing no interfaces within the resin should be preferred. Furthermore, interply adhesion for these three binders was investigated in a peeling test using fibre preforms. It was found that differences in peel strength might be controlled predominantly by different kinds of binder layer formations, but also to some extent by the different binder-fibre interaction (binder and fibre sizing correlation). Best performance was shown by D 2433E, followed by Grilon MS and K-140. All in all, the soluble binder Grilon MS exhibited the best results in mechanical testing of resin-binder plates and is therefore expected to also show the best mechanical performance in GFRP laminates.

Item URL in elib:https://elib.dlr.de/127828/
Document Type:Article
Title:Powder binders used for the manufacturing of wind turbine rotor blades. Part 1: Characterisation of resin-binder interaction and preform properties
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Schmidt, Stefanstefan.schmidt (at) dlr.deUNSPECIFIED
Mahrholz, ThorstenThorsten.Mahrholz (at) dlr.dehttps://orcid.org/0000-0003-1488-0910
Kühn, Alexandraalexandra.kuehn (at) dlr.deUNSPECIFIED
Wierach, Peterpeter.wierach (at) dlr.deUNSPECIFIED
Date:2018
Journal or Publication Title:Polymer Composites
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:39
DOI :10.1002/pc.23988
Page Range:pp. 708-717
Editors:
EditorsEmailEditor's ORCID iD
Lesser, Alan J.ajl@polysci.umass.eduUNSPECIFIED
Publisher:Wiley
ISSN:0272-8397
Status:Published
Keywords:glass fiber reinforced polymer (GFRP), preforming, binder solubility, peel strength, epoxy resin, wind turbine rotor blade
HGF - Research field:Energy
HGF - Program:Renewable Energies
HGF - Program Themes:Wind Energy
DLR - Research area:Energy
DLR - Program:E SW - Solar and Wind Energy
DLR - Research theme (Project):E - Wind Energy (old)
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Multifunctional Materials
Deposited By: Mahrholz, Dr.rer.nat. Thorsten
Deposited On:21 Jun 2019 10:54
Last Modified:21 Jun 2019 10:54

Repository Staff Only: item control page

Browse
Search
Help & Contact
Information
electronic library is running on EPrints 3.3.12
Copyright © 2008-2017 German Aerospace Center (DLR). All rights reserved.