. Author manuscript; available in PMC: 2012 Nov 29.

Published in final edited form as: Macromolecules. 2011 Nov 29;44(24):9574–9585. doi: 10.1021/ma2020936

Table 1.

NHC-mediated zwitterionic polymerizations of M₁.^a

Entry#	[M₁]₀/[I]₀	Reaction time (h)	Conv. (%)	M_n(theor.)^b (kg·mol⁻¹)	M_n(SEC)^c (kg·mol⁻¹)	M_n(NMR)^d (kg·mol⁻¹)	PDI^c
1	25	8	89	4.8	4.8	5.6	1.14
2	50	16	93	9.6	10.2	11.1	1.03
3	100	16	91	18.3	20.4	20.0	1.15
4	200	21	83	33.1	31.0	-	1.09

Polymerizations were conducted in THF at 70 °C with [M₁]₀ = 0.4 M. SEC analyses were conducted by directly injecting the polymerization solutions into SEC columns after the designated reaction time

theoretical molecular weights were calculated based on conversion and the [M₁]₀:[NHC]₀ ratio

determined by a tandem SEC-MALS-DRI system using the dn/dc [0.0876(9) mL·g⁻¹] in THF at room temperature

determined by ¹H NMR analysis. Entry 4: The NHC content of the high MW PNDG is too low to be accurately integrated and hence its MW cannot be reliably determined by ¹H NMR.