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Wood Research and Technology

Holzforschung

Cellulose – Hemicelluloses – Lignin – Wood Extractives

Editor-in-Chief: Salmén, Lennart

Editorial Board: Daniel, Geoffrey / Militz, Holger / Rosenau, Thomas / Sixta, Herbert / Vuorinen, Tapani / Argyropoulos, Dimitris S. / Balakshin, Yu / Barnett, J. R. / Burgert, Ingo / Rio, Jose C. / Evans, Robert / Evtuguin, Dmitry V. / Frazier, Charles E. / Fukushima, Kazuhiko / Gindl-Altmutter, Wolfgang / Glasser, W. G. / Holmbom, Bjarne / Isogai, Akira / Kadla, John F. / Koch, Gerald / Lachenal, Dominique / Laine, Christiane / Mansfield, Shawn D. / Morrell, J.J. / Niemz, Peter / Potthast, Antje / Ragauskas, Arthur J. / Ralph, John / Rice, Robert W. / Salin, Jarl-Gunnar / Schmitt, Uwe / Schultz, Tor P. / Sipilä, Jussi / Takano, Toshiyuki / Tamminen, Tarja / Theliander, Hans / Welling, Johannes / Willför, Stefan / Yoshihara, Hiroshi


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1437-434X
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Volume 68, Issue 3

Issues

Effect of fiber modification with 3-isopropenyl-dimethylbenzyl isocyanate (TMI) on the mechanical properties and water absorption of hemp-unsaturated polyester (UPE) composites

Wendi Liu
  • College of Material Engineering, Fujian Agriculture and Forestry University, Jinshan, Fuzhou, Fujian Province 350002, P. R. China
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Tingting Chen
  • College of Material Engineering, Fujian Agriculture and Forestry University, Jinshan, Fuzhou, Fujian Province 350002, P. R. China
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Renhui Qiu
  • Corresponding author
  • College of Material Engineering, Fujian Agriculture and Forestry University, Jinshan, Fuzhou, Fujian Province 350002, P. R. China
  • Email
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
Published Online: 2013-09-18 | DOI: https://doi.org/10.1515/hf-2013-0104

Abstract

Hemp fibers were modified with 3-isopropenyl-dimethylbenzyl isocyanate (TMI), in presence of dibutyltin dilaurate (DBT) as a catalyst. Then reinforced hemp-unsaturated polyester (UPE) composites were prepared with modified fibers by means of hand lay-up compression molding. The fiber treatments significantly increased the tensile strength (TS), flexural strength (FS), and water resistance of the resulting composites, while their flexural modulus (FM) was not influenced. The tensile-fractured surfaces of the composites were observed by SEM and the images revealed that fiber treatments significantly improved the interfacial adhesion between hemp fibers and UPE resins. FT-IR spectra and X-ray photoelectron spectroscopy (XPS) analysis indicated that the treated-fibers were partly covalently bound to TMI.

Keywords: composites; hemp fibers; mechanical properties; surface modification; water absorption; 3-isopropenyl-dimethylbenzyl isocyanate (TMI)

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About the article

Corresponding author: Renhui Qiu, College of Material Engineering, Fujian Agriculture and Forestry University, Jinshan, Fuzhou, Fujian Province 350002, P. R. China, Phone: +86 591 83738907, Fax: +86 591 83715175, e-mail:


Received: 2013-06-13

Accepted: 2013-08-20

Published Online: 2013-09-18

Published in Print: 2014-04-01


Citation Information: Holzforschung, Volume 68, Issue 3, Pages 265–271, ISSN (Online) 1437-434X, ISSN (Print) 0018-3830, DOI: https://doi.org/10.1515/hf-2013-0104.

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