Condensed polynuclear aromatic resin

JAP2151>. Non-cross-linked condensed polynuclear aromatic resins were prepared using 1,2,4-trioxane and a number of aromatic compounds as monomers at 80-100 °C under acidic catalysis. A mechanism for the polymerization reaction was proposed and the resins obtained were found to be stable up to 400 C. 

Otani S, Some properties of a condensed polynuclear aromatic resin (COPNA) as a binder for carbon fibre composites, J Mater Sci, 21(6), 2027, 1986. 

They also formed the condensed polynuclear aromatic (COPNA) resin film on a porous a-alumina support tube. Next, a pinhole-free CMSM was produced by carbonization at 400-1,000°C [29], The mesopores of the COPNA-based caibon membranes did not penetrate through the total thickness of each membrane and served as channels which increased permeances by linking the micropores. CMSMs produced using COPNA and BPDA-pp ODA polyimdes showed similar permeation properties even though they had different pore stractures. This suggests that the micropores are responsible for the permselectivities of the carbonized membrane. Besides that, Fuertes [30] used phenohc resin in conjunction with the dip coating technique to prepare adsorption-selective carbon membrane supported on ceramic tubular membranes. 

Kusakabe K, Gohgi S, Morooka S (1998) Carbon molecular sieving membranes derived from condensed polynuclear aromatic (COPNA) resins for gas separation. Ind Eng Chem Res 37 (11) 4262-4266... 

Condensed polynuclear aromatic (COPNA) resins were used as precursor for carbonization by Kusakabe and co-woikers [64], Since COPNA resin is a thermoplastic resin with three-dimensional stmcture, the pore stracture of the carbonized COPNA membrane is expeeted to be different from that of the membrane fabricated by carbonization of PI which is hnear. COPNA corrrporrrrds were synthesized from polycyclic aromatic compormd (PCA) such as pyrene, phenanthrene and 1,4-ben-zenedimethanol (BDM) using p-toluene srriforrie acid as the eatalyst by the procedure given in Fig. 4.18. 

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