Effect of Different Catalysts on Properties of Coal Tar Pitch Modified by Cinnamaldehyde

Figure 4

Optical micrographs of the products prepared from B₀C₀, B₇C₁₀, and P₇C₁₀ heated at 400°C for 1 h. (a) B₀C₀; (b) B₇C₁₀; (c) P₇C₁₀.