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      Main-chain polybenzoxazine nanofibers via electrospinning

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      Author(s)
      Ertas, Y.
      Uyar, Tamer
      Date
      2014-01-30
      Source Title
      Polymer
      Print ISSN
      0032-3861
      Publisher
      Elsevier
      Volume
      55
      Issue
      2
      Pages
      556 - 564
      Language
      English
      Type
      Article
      Item Usage Stats
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      Abstract
      Here we report the successful production of nanofibers from main-chain polybenzoxazines (MCPBz) via electrospinning without using any other carrier polymer matrix. Two different types of MCPBz (PBA-ad6 and PBA-ad12) were synthesized by using two types of difunctional amine (1,6-diaminohexane and 1,12-diaminododecane), bisphenol-A, and paraformaldehyde as starting materials through a Mannich reaction. 1H NMR and FTIR spectroscopy studies have confirmed the chemical structures of the two MCPBz. We were able to obtain highly concentrated homogeneous solutions of the two MCPBz in chloroform/N,N-dimethylformamide (DMF) (4:1, v/v) solvent system. The electrospinning conditions were optimized in order to produce bead-free, uniform and continuous nanofibers from these two MCPBz by varying the concentrations of PBA-ad6 (30–45%, w/v) and PBA-ad12 (15–20%, w/v) in chloroform/DMF (4:1, v/v). The bead-free fiber morphology was evidenced under SEM imaging when PBA-ad6 and PBA-ad12 were electrospun at solution concentration of 40% and 18% (w/v), respectively. The nanofibrous mats of MCPBz were obtained as free-standing material, yet, PBA-ad12 mat was more flexible than and PBA-ad6 mat. Furthermore, the curing studies of these MCPBz nanofibrous mats were performed to obtain cross-linked materials.
      Keywords
      Main-chain polybenzoxazines
      Electrospinning
      Nanofiber
      Permalink
      http://hdl.handle.net/11693/10943
      Published Version (Please cite this version)
      http://dx.doi.org/10.1016/j.polymer.2013.12.018
      Collections
      • Institute of Materials Science and Nanotechnology (UNAM) 1930
      • Nanotechnology Research Center (NANOTAM) 1063
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