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. 2023 Jun 26;57(27):9925–9933. doi: 10.1021/acs.est.3c01134

Figure 1.

Figure 1

Preparation of spherical PS particles sized ∼500 nm by emulsifier-free emulsion polymerization and its molecular weight and size comparison with the standard PS model particles sized ∼500 nm. (A) 1H NMR spectra of standard PS as received (MIP) in red and in-house synthesized PS dialysis against Milli-Q water for 40 days (SIP) in blue. (B) Molecular weight measured by GPC of standard PS as received (MIP) in red, Mn = 3.31 × 104, dispersity Đ = 4.43 and of in-house synthesized PS dialyzed against Milli-Q water for 40 days (SIP) in blue, Mn = 2.54 × 104, dispersity Đ = 5.55. (C) Size determined by SEM for SIP, 515 ± 17 nm. (D) Size determined by SEM for MIP, 507 ± 7 nm. Scale in (C, D): 1 μm.