| 摘要 |
Provided are a poly(p-phenylenebenzobisoxazole) crystal that takes a characteristic crystalline state and a method for producing the same, and a composite material and a method for producing the same. The poly(p-phenylenebenzobisoxazole) crystal which is a plate crystal is formed by cooling a solution prepared by completely dissolving poly(p-phenylenebenzobisoxazole), at a rate of 0.2°C/min or less, to deposit nanofibers of poly(p-phenylenebenzobisoxazole), and binding the deposited elongated PBO nanofibers into a bundle with the nanofibers being arranged parallel to each other, extending in the longitudinal direction, and being joined together in a direction perpendicular to the longitudinal direction. |
