Fig. 3
From: Modified silicas with different structure of grafted methylphenylsiloxane layer
Nitrogen adsorption isotherms (a) and pore size distribution for silicas modified with PMPS using protocol 1 (b) and protocol 2 (c). Figures illustrate nitrogen adsorption on silicas modified with PMPS using multistage process with different ratios of polymer and depolymerization agent (PMPS/DMC) with introducing at the first stage the short- (samples 3 and 4), middle- (samples 2 and 5), and long-length oligomers (samples 1 and 6) and application of two protocols of polymer chemisorption. The pore size distribution was calculated from desorption branch of isotherm for samples synthesized using protocol 1 (samples 1–3) and protocol 2 (samples 4–6) (see Table 1)