Table 1. Effect of the Molar Ratio of D4 to Li⁺ on Polymerization^a.

entry	n(D4)/n(Li+)	Mn/104 (Da)	PDI	yield/%
1	500	15.6	1.81	72.0
2	1000	20.9	1.54	82.6
3	1500	28.4	1.40	85.0
4	2000	11.9	2.40	80.9
5	3000	10.9	3.00	80.9

^aConditions: Polymerization was carried out at 110 °C for 4 h, and the amount of DMSO was 3 wt % of D4.