. Author manuscript; available in PMC: 2015 Jan 1.

Published in final edited form as: Chem Sci. 2014 Jan;5(2):10.1039/C3SC52504J. doi: 10.1039/C3SC52504J

Table 1.

Average degree of polymerization (DP_n), number of repeat unit, mole fraction of Gly (χ_Gly) in the polypeptide segment, number-average molecular weight (M_n) and critical gelation concentration (CGC) for the mPEG-b-P(BLG-co-Gly) diblock copolymers synthesized with different monomer feed ratios.

Polymer	1 : 2^a)	DP_n^b)	Number of repeat unit^b)		χ_Gly (%)^b)	M_n (kDa)^b)	CGC (wt %)^c)
Polymer	1 : 2^a)	DP_n^b)	1, BLG	2, Gly	χ_Gly (%)^b)	M_n (kDa)^b)	CGC (wt %)^c)
4	1 : 0	33	33	0	0	9.2	-^d)
5	6 : 1	33	29	4	12	8.6	-^d)
6	3 : 1	31	25	6	19	7.8	2.5
7	2 : 1	31	22	9	29	7.3	1.5
8	1.5 : 1	30	19	11	37	6.8	1.2
9	1.2 : 1	30	17	13	43	6.5	0.9
10	1 : 1	32	16	16	50	6.4	0.6
11	1 : 4	32	6	26	81	4.8	0.8
12	0 : 1	33	0	33	100	3.9	2.0

^a)

The mPEG₄₅-NH₂ (3) were used as macroinitiators in all polymerizations with monomer : initiator = 30 : 1;

^b)

Calculated by ¹H NMR spectroscopy;

^c)

CGCs of organogels in DMF were determined by the test tube inversion method at room temperature;

^d)

No gelation was observed with the concentration of polymer up to 10 wt %