Table 2. Syntheses of Branched PnBA in Cyrene as a Green, Fully Biodegradable Solvent via the SARA ATRP Technique^a.

entry	initiator	t [h]	convb [%]	kpappb	Mn,theoc	Mn,appd	Mw/Mnd
1	RF-Br2	6.50	79	0.226	16,300	13,800	1.24
2	Trox-Br10	4.00	84	0.385	86,000	35,800	1.37
3	β-CD-Br15	4.50	83	0.385	127,600	29,300	1.54

^aGeneral reaction conditions: T = 50 °C; V_tot = 4 mL; argon atmosphere; [nBA]₀ = 50% v/v; entry 1: [nBA]₀ = 3.49 M, entry 1: [nBA]₀ = 3.50 M, [RF-Br₂] = 0.024 M calculated per 2 Br initiation sites, entry 2: [Trox-Br₁₀] = 0.024 M calculated per 10 Br initiation sites, and entry 3: [nBA]₀ = 3.47 M [β-CD-Br₁₅] = 0.024 M calculated per 15 Br initiation sites; [nBA]₀/[initiator]₀/[Cu^IIBr₂/Me₆TREN]₀ = 80 (per side chain/arm)/1/0.024 for all entries. SARA ATRP with copper wire: d = 0.1 cm, l = 4 cm.

^bMonomer conversion and apparent rate constant of propagation (k_p^app) were determined by NMR.

^cM_n,theo = ([nBA]₀/[initiator]₀) × conversion × M_Monomer + M_Initiator.

^dApparent M_n and M_w/M_n were determined by GPC.