This paper deals with a new finding on the morphology control of poly[2,2′-(p-phenylene)-5,5′-bibenzimidazole] (PBI) by using the reaction-induced crystallization of oligomers during solution polymerization. Polymerizations of 3,3′-diaminobenzidine and diphenyl terephthalate or terephthalic acid were carried out at 350°C for 6 hours in poor solvent such as dibenzyl toluene mixture to induce the crystallization of oligomers. Bundle-like aggregates of PBI nanofibers and plate-like PBI crystals were prepared with high yields. The values of inherent viscosity of FBI were 0.49 - 0.58 dL/g. Obtained crystals possessed high crystallinity measured on WAXS and good thermal stability. The morphology of the products was drastically influenced by the end-group structure of phase separated oligomers.
|出版ステータス||Published - 12月 1 2006|
|イベント||55th Society of Polymer Science Japan Symposium on Macromolecules - Toyama|
継続期間: 9月 20 2006 → 9月 22 2006
|Other||55th Society of Polymer Science Japan Symposium on Macromolecules|
|Period||9/20/06 → 9/22/06|
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