Evidently, the presence of TMB causes an increase in the pore size due to its incorporation readily into the micelle, increasing its width and consequently the volume and pore diameter of the resulting solid [18,19]. The pore size expansion can be explained on the basis that TMB being a no polar compound dissolves inside the triblock copolymer assemblies, thus increasing the volume of the hydrophobic moiety, so the pore size increases. Furthermore, higher temperature and longer reaction time result in larger pore sizes and thinner pore walls due to PEO hydrophilicity temperature dependence, which increases as temperature increases, as reported by Dalai and Davis [8]. Besides, at low temperature, the segments of the triblock copolymer are in an amorphous state and they tend to stretch as temperature increases. Similarly, not only the segment of