Table 1 Characterization of poly-BLG prepared using different initiators

Entry	Initiator	M:I	Mn(g mol⁻¹)	Đ	DP
1	LiHMDS	5	7490	1.23	34
2	LiHMDS	10	16,260	1.25	74
3	LiHMDS	20	27,340	1.20	124
4	LiHMDS	100	78,090	1.24	357
5	LiHMDS	500	111,900	1.15	510
6^a	n-hexylamine	20	4580	1.04	21
7	n-hexylamine	100	27,970	1.23	127
8^b	n-hexylamine	500	60,770	1.26	277
9	HMDS	20	7470	1.01	34
10	HMDS	100	32,070	1.22	146
11^b	HMDS	500	56,120	1.36	256
12	bipyNi(COD)	20	23,800	1.28	108
13	bipyNi(COD)	100	123,100	1.29	562
14	bipyNi(COD)	500	458,100	1.16	2091

Note: Polymerization of BLG NCA using LiHMDS as the initiator (entry 1–5) was compared to polymerization using n-hexylamine (entry 6–8), HMDS (entry 9–11), or bipyNi(COD) (entry 12–14) as the initiator. All polymers were synthesized using THF as the solvent and were characterized by GPC using DMF as the mobile phase. Mn is the obtained number average molecular weight, Đ is the dispersity index, DP is the obtained degree of polymerization
^aa bimodal GPC trace was obtained with unexpected high Mn component (Fig. 2d for bimodal GPC trace)
^bsignificant amount of NCA was left even after the polymerization reaction continued for 5 days

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