Abstract
An efficient preparation of mesophase spheres was attempted from synthetic isotropic pitches of naphthalene oligomers. A large number of spheres of rather uniform diameter were obtained by the carbonization at 380°C for 20 h. Volumetric and yields of spheres in the pitch were volumetrically measured under the optical microscope and extracted; a pyridine soluble fraction as high as 42 vol% and 15 wt%, respectively was reached. Such a difference in the yields suggests that the spheres prepared in the present study included a significant amount of the pyridine soluble fraction. The extracted sphere carried a number of pores, leaving rod-like units. Self-assembling units of pyridine insoluble fraction produced in the mesophase are suggested to be precipitated to form a spherical shape.
Original language | English |
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Pages (from-to) | 1569-1576 |
Number of pages | 8 |
Journal | Carbon |
Volume | 34 |
Issue number | 12 |
DOIs | |
Publication status | Published - 1996 |
All Science Journal Classification (ASJC) codes
- Chemistry(all)
- Materials Science(all)