Abstract:

The composite of polyarylacetylene resin/fir powder was prepared by impregnating and thermoforming, and then a novel woodceramics was obtained by carbonizing the composite at high temperatures. Thermal stabilities of polyarylacetylene resin and the composite were analyzed by DTG. Influences of carbonization temperature and resin content on phase composition, pore morphology and compression strength were analyzed by XRD, LRS and SEM, respectively. The results show that the woodceramics was of a uniform three-dimensional porous structure. The decomposition temperature and char yield of the composite were 325 ℃ and 70% respectively. With increasing carbonization temperature, the (002) interlunar spacing decreased from 0.3895 nm to 0.3530 nm. However, the crystallite sizes Lc and La increased in different degrees. The open porosity of the woodceramics gradually decreased from 31.5% to 20.1% with the increase of carbonization temperature, while the compressive strength increased from 3.0 MPa to 6.2 MPa. The mass ratio of polyarylacetylene resin to fir powder had effect on the size and shape of the micropore of the woodceramics obviously, but a slight effect on the graphite crystallite size of the woodceramics.

Key words: polyarylacetyleneresin, firpowder, carboncomposite, woodceramics, porousmaterials?