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Table 1 Molecular weight data for synthesized polymers.a)

From: Enzymatic- and temperature-sensitive controlled release of ultrasmall superparamagnetic iron oxides (USPIOs)

Polymers dn/dc at 40°Cb) M n M w PDI M n from NMR Average Degree of polymerization by NMR
  mL/g Da Da unitless Da  
PPS-COOH 0.246 1650 1950 1.18 874 10
H2N-PEG-COOH c) -- 4200 -- -- -- 110
cPEG-PPS 0.183 7320 10200 1.39 5100 --
  1. a) Molecular weight of polymers was determined by GPC-MALS. Polymers were injected into a TSKGel Mixed Bed HZM-N column (4.6 mm ID × 15 cm) and chromatograms from the MALS detector and differential refractive index detector were used to analyze for polydispersity.
  2. b) dn/dc values were measured in offline batch mode by direct injection of serial dilutions of polymer samples into the refractive index detector of the GPC. The sample cell was maintained at 40°C. Data analysis was done on the Wyatt Astra software.
  3. c) Values for M n , M w , and PDI were provided by manufacturer.