Table 4. Syntheses of Branched PnBA in Cygnet 0.0 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	Rib-Br2	1.38	89	1.510	19,000	15,900	1.31
2	Trox-Br10	2.00	78	0.761	82,200	33,700	1.37
3	β-CD-Br15	2.25	74	0.634	118,700	37,100	1.41

^aGeneral reaction conditions: T = 75 °C; V_tot = 3 mL for entry 1, V_tot = 4 mL for entries 2 and 3; argon atmosphere; [nBA]₀ = 50% v/v; entry 1: [nBA]₀ = 3.48 M, [RF-Br₂] = 0.0217 M calculated per 2 Br initiation sites, entry 2: [nBA]₀ = 3.48 M, [Trox-Br₁₀] = 0.0043 M calculated per 10 Br initiation sites, and entry 3: [nBA]₀ = 3.47 M [β-CD-Br₁₅] = 0.0029 M calculated per 15 Br initiation sites; [nBA]₀/[initiator]₀/[Cu^IIBr₂/Me₆TREN]₀ = 80/1/0.008 for all entries. SARA ATRP with copper wire: d = 0.1 cm, l = 3 cm for entry 1, d = 0.1 cm, l = 4 cm for entries 2 and 3.

^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.