Pinewood Composite Prepared by In Situ Graft Polymerization of Epoxy Monomer

Tutkimustuotos: Lehtiartikkelivertaisarvioitu

Tutkijat

Organisaatiot

  • Universidade Federal do Paraná
  • Universidade Federal de Santa Maria
  • Embrapa Forestry

Kuvaus

Composites were prepared by graft polymerization of glycidyl methacrylate (GMA) into low-quality Brazilian pinewood. Oven-dried pinewood samples were impregnated with GMA (1.5 wt% of benzoyl peroxide as catalyst), polymerized by heat at 90°C for 10 h, and washed with acetone to leach the unreacted chemicals. The characterization was performed by treatability parameters, scanning electron microscopy images, ATR-IR spectroscopy, TGA, differential scanning calorimetry (DSC), mechanical properties, water uptake and dimensional stability measurements, and decay resistance tests. The main results showed that the conversion of monomers into grafted polymers was high—up to 85%. The graft polymerization was confirmed by reduction (∼15°C lower) in the temperature of the main thermal event via DrTG and DSC. A decrease in OH band and an increase of peaks corresponding to CO and CO bonds in ATR-IR also confirmed the grafting. The hygroscopicity and wetting were reduced ∼10 times, dimensional stability improved about 70%, and mechanical properties improved between 55 and 85% after the graft polymerization. Decay resistance also increased both against brown and white rot fungi. The graft polymerization of glycidyl methacrylate can improve many technological properties of low-quality pinewood. POLYM. COMPOS., 38:597–603, 2017.

Yksityiskohdat

AlkuperäiskieliEnglanti
Sivut597-603
Sivumäärä7
JulkaisuPolymer Composites
Vuosikerta38
Numero3
TilaJulkaistu - 1 maaliskuuta 2017
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

ID: 21730914