Journal of Nanobiotechnology

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°C^b)	M _n	M _w	PDI	M_nfrom 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	--

^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.
^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.
^c) Values for M_n, M_w, and PDI were provided by manufacturer.

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ISSN: 1477-3155

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