Table 1.

Properties of PEG by SEC.

Polymer	${\mathbf{M}}_{\mathbf{n},\mathbf{SEC}}^{\mathbf{a}}$ (g mol−1)	${\mathbf{M}}_{\mathbf{p},\mathbf{SEC}}^{\mathbf{a}}$ (g mol−1)	Mw/Mn	Ideal diameter of c-PEG (nm)
HO–PEG1k–OH	860	1220	1.35	—
c-PEG1k	430	520	1.38	2.2
HO–PEG3k–OH	2890	3100	1.06	—
MeO–PEG3k–OMe	2990	3110	1.06	—
HS–PEG3k–OMe	2500	2540	1.07	—
HS–PEG2k–SH	2220	2500	1.08
c-PEG3k	1910	2090	1.07	7.4
HO–PEG5k–OH	5450	5480	1.03	—
MeO–PEG5k–OMe	5460	5480	1.03	—
c-PEG5k	3750	3860	1.05	14
HO–PEG10k–OH	10,800	11,060	1.01	—
MeO–PEG10k–OMe	11,760	12,140	1.01	—
c-PEG10k	8500	8810	1.02	28

^aDetermined by SEC in THF using polystyrene standards.