Kinetics of Free Radical Polymerization of N-Substituted Amides and Their Structural Implications

Table 4

Evolution of poly(NMNVA) tacticity.

Solvent	IP							Pr/m		Pm/r
		rr	mr	mm	rr	mr	mm
1,4-Dioxane	4.8	39	37	24	36	41	23	0.322	0.363	0.435	0.471
THF	4.0	31	40	29	36	37	27	0.392	0.339	0.408	0.407
Toluene	2.4	48	30	22	44	37	19	0.238	0.296	0.405	0.493

IP is polarity index; α and β are the two regions from NMR spectra used to estimate the tacticity; rr is isotactic fraction; mr is atactic fraction; mm is syndiotactic fraction; Pr/m is the conditional probability; and Pm/r is the reverse probability from Bernoullian statistics.