Table 1. Reaction Conditions and Properties of RPs Recovered from PUFs by Aminolysis with Different Amounts of TREN and HMDA at 220 °C for 30 min^a,b.

		amino/urethane group ratio in equivalents
entry	PUF type	TREN	HMDA	PUF/VP/reagent (g/g/g)	reagent/PUF (wt %)	urethane group content (mol %)	amino end group content (mol %)	TDA content (wt %)	allyl group	Mw (kg mol–1)	Đ	yield (%)
1	PUF5611	1.50		6/3/0.29	4.8	9.7	8.4	3.9	yes	3.2	1.03	c
2	PUF5611	2.25		6/3/0.44	7.3	5.8	5.8	6.0	no	3.1	1.02	66
3	PUF5611	3.00		6/3/0.58	9.7	3.7	3.6	7.7	no	3.1	1.02	74
4	PUF5611	4.00		6/3/0.79	13.2	1.0	0.9	10.2	no	3.0	1.02	85
5	PUF5611		4.00	6/3/0.92	15.3	7.3	6.9	7.1	no	3.1	1.02	c
6	PUF5611		4.00	6/3/0.92 + 0.30 DABCO	15.3	3.7	3.5	7.1	no	3.0	1.02	c
7d	PUF4811	4.00		6/3/0.68	11.3	e	0.6	9.3	no	3.5	1.02	c
8d	Post-consumer PUF4811	4.00		6/3/0.68	11.3	e	0.2	10.1	no	3.5	1.02	86
9d	PUF2832	4.00		6/3/0.56	9.3	e		13.4	no	6.0	1.08	c
10	PUF5611 from RP	4.00		6/3/0.79	13.2	e	0.7	9.5	no	3.0	1.02	83
11	PUF5611	4.00		6/3(RP)/0.79	13.2	e	0.6	10.9	no	3.0	1.01	c
12f	PUF5611	4.00		6/0/0.79 (bulk)	13.2	e	0.4	15.7	no	3.0	1.02	c

^aMolar mass characteristics of VPs as determined by SEC/MALS-RI are M_w = 3.0 kg mol^–1, Đ = 1.02 for VP5611; M_w = 3.5 kg mol^–1, Đ = 1.02 for VP4811; and M_w = 6.0 kg mol^–1, Đ = 1.06 for VP2832.

^bThe contents of urethane groups, TDA, and amino end groups in RP were calculated according to eqs S1–S3, respectively.

^cNot determined.

^dThe molar masses for the copolymer polyols VP4811 and VP2832 and their chemical composition were considered in the calculations of the contents of urethane and amino groups, and the TDA content.

^eThe intensity of the polyol ¹H NMR methyne signal near the urethane group is too low for accurate quantification.

^fAminolysis of PUF performed in bulk.