Stereocontrol of Methyl Methacrylate during Photoinduced Nitroxide-Mediated Polymerization in the Presence of Photosensitive Alkoxyamine

Table 1

Experiment data of PMMA by photopolymerization.

Initiator		Time (h)	Conv. (%)			PDI	Tacticity (::
DMPA		—	17.07	—	18900	2.20	27.0/27.9/45.1	40.95/59.05
	2	—	53.17	—	28300	2.74	27.4/26.1/46.5	40.45/59.55
	3	—	77.52	—	43500	2.63	24.4/27.8/47.8	35.80/60.20
PE-TEMPO-Q		2	11.31	5317	17700	2.09	8.7/31.2/60.1	24.30/75.70
	5	3	21.34	9650	28500	1.86	6.8/32.1/61.1	22.85/77.15
	6	4	27.49	12307	35300	1.74	4.9/34.7/60.4	22.25/77.75
	7	5	45.51	20092	43000	1.69	4.8/34.5/60.7	22.05/77.95
	8	6	57.52	25280	49800	1.59	4.5/34.1/61.4	21.55/78.45
PE-TEMPO-Q		2	9.11	1743	10500	1.84	9.9/32.6/57.5	26.20/73.80
	10	3	18.87	3149	14200	1.74	7.1/34.3/58.6	24.25/75.75
	11	4	28.52	4539	17300	1.62	5.9/35.9/58.2	23.85/76.15
	12	5	41.10	6351	19600	1.57	4.9/34.9/60.2	22.35/77.65
	13	6	48.23	7377	22500	1.49	4.4/35.4/60.2	22.10/77.90
	14	8	58.52	8859	27000	1.45	4.4/34.7/60.9	21.76/78.25
	15	10	67.13	10098	28700	1.42	4.5/34.5/61.0	21.75/78.25
	16	12	74.38	11142	30000	1.38	4.5/34.6/61.1	21.80/78.40

(a) Light intensity was 20 mW/cm², = 1 mL; (b) DMPA = 2 wt.%; (c)  PE-TEMPO-Q =  mmol; (d)  mmol; (e) = (MMAAlkoxyamine.%) + ; (f) measured by GPC in THF; (g) = isotactic triads; = atactic triads; = syndiotactic triads; (h) calculated based on triad tacticity (/2, /2).