Table 1. Summary of star polymers synthesized by the carbodiimide coupling of PHPMA block copolymers with compound 2 .

Entry	Linear polymer a	N arm b	M w,GPC c (g mol–1)	Đ c	Size d (nm)
1	PEG113-b-PHPMA10	6	4.11 × 104	1.23	27
2	PEG113-b-PHPMA24	11	9.64 × 104	1.45	50
3	PEG113-b-PHPMA70	47	7.88 × 105	1.36	60
4	PEG113-b-PHPMA213	Gelled	n/a	n/a	n/a

^a From Table S1, entries 1–4.

^b Number of arms (N _arm) per star polymer was calculated by the following equation: .

^c Determined by GPC-MALLS, assuming dn/dc values identical to those of the linear polymer precursors (dn/dc values are listed in Table S1).

^d Determined by DLS in aqueous solution.