Table 2. Radical Ring-Opening Copolymerization of 1 and MMA^a.

entry	f1/fMMA	1 conv.b (%)	MMA conv.c (%)	FE/FAd	Mn,SECe	ĐMe	F1/FMMAf	yieldg (%)	Tgh (°C)	Td5% (°C)
1	10/90	99	99		39.9	2.59	2/98	74	117	286
2	30/70	99	99	28/72	24.4	2.01	16/84	72	109	274
3	50/50	99	99	36/64	12.6	2.43	33/67	69	99	238

^aReactions were carried out over 20 h at 140 °C, under an argon atmosphere, in anhydrous ODCB with [1]₀ = 4.8 mol L^–1 and [M_total]₀:[DTBP]₀ = 100:1.

^bMonomer conversion to polymer, calculated based on the relative integration of the methylene proton signal of 1 (δ_H = 3.85, d, 2H) and the resultant alkyl proton signal of poly(1-co-MMA) (δ_H = 2.82–2.36, m, 2H), in the ¹H NMR spectrum.

^cMonomer conversion to polymer, calculated based on the relative integration of MMA and PMMA alkyl protons in the ¹H NMR spectrum.

^dPolymer composition between ester (F_E) and acetal (F_A) linkages, determined using ¹³C{¹H} NMR spectroscopy when possible.

^eNumber-average molar mass and dispersity (M_n,SEC, Đ_M), calculated by SEC relative to polystyrene standards in THF eluent, units in kg mol^–1.

^fCopolymer compositions determined by integration of the ¹H NMR spectra of the purified copolymers.

^gIsolated polymer yield, oligomeric species were also separated during isolation.

^hValues obtained from DSC second heating cycle.