Surface-Initiated Atom Transfer Radical Polymerization of Magnetite Nanoparticles with Statistical Poly(tert-butyl acrylate)-poly(poly(ethylene glycol) methyl ether methacrylate) Copolymers

Table 1

The monomer conversion, , and PDI of P[(t-BA)-stat-PEGMA] copolymer (50/50 molar ratio) using 50/50/1/1/1 molar ratio of [t-BA]₀/[PEGMA]₀/[EBiB]₀/[CuBr]₀/[PMDETA]₀ in 1,4-dioxane at 90°C.

Entry	Reaction time	% conversion^a		(exp) (g/mol)	(theo) (g/mol)	PDI^b
		t-BA	PEGMA
1	15 min	11	33	5,898	5,655	1.3
2	45 min	24	55	13,604	9,788	1.5
3	2 h	51	78	18,300	14,968	1.6
4	4 h	72	93	21,419	18,564	1.8

^aIt is determined via ¹H NMR (monomer depletion monitored relative to DMF signal, which was used as an internal standard).
^bIt is measured via GPC (calibrated with polystyrene standard).
^c = ([t-BA]₀/[EBiB]₀ × conv. × ) + ([PEGMA]₀/[EBiB]₀ × conv._PEGMA × M_PEGMA).