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. 2017 Apr 5;2(4):1309–1320. doi: 10.1021/acsomega.7b00007

Table 1. Structural Parameters of the Phosphonic and Carboxylic PEG Copolymers Used in This Worka.

terminus Mn(PEG), g mol–1 Mn, g mol–1 Mw, g mol–1 acid group, meq g–1 funct. group per chain
phosphonic acid 1000 5300 9500 1.58 4.2
2000 7200 12 950 0.87 3.1
5000 42 600 76 650 0.35 7.4
carboxylic acid 2000 8600 15 500 0.46 4.0
a

Mn(PEG) denotes the PEG molecular weight of the pendant side chains and Mn and Mw denote the number and mass averaged molecular weights of the statistical copolymers, respectively, as determined by light scattering. The molar equivalent of acid groups per gram (meq g–1) of polymer was determined from 1H and 31P NMR, leading to estimates of the number of functionalized groups per chain.