Molecular characteristics of the mPEG-b-PCL copolymers.

Sample	NMR		GPC		DSC
	M n PCLa	M n polymerb	M n	Đ c	T m (°C)	ΔH (J g−1)
mPEG350–PCL2000	1940	2290	7380	1.6	50.2	78.7
mPEG550–PCL2000	2060	2610	6820	1.6	55.7	82.3
mPEG750–PCL2000	1940	2690	7600	1.4	50.1	74
mPEG2000–PCL2000	2170	4170	10 960	1.5	59.1	82.5
mPEG350			390	1.2	−6.8	49.1
mPEG550			680	1.1	14.4	129.6
mPEG750			980	1.1	29.7	145.4
mPEG2000			3300	1.1	51.9	171.7
ε-CL					−1.3	119.2

^aCalculated by integration of peak b of the ¹H NMR spectrum.

^bCalculated by M_n(mPEG) + M_n(PCL).

^cPolydispersity (M_w/M_n).