Table 2.

Analysis of signal integration in ¹H NMR spectrum of the synthesised polyurethane No. 2 and 33

Type of structure	Based on NMR spectrum					Based on chemical formula (3)
	Type of proton (Figs. 1 and 2 )	Sample No. 2		Sample No. 33		Type of proton	Structural fragment derived	Number of protons
		δ (ppm)	Integrations (conventional unit)	δ (ppm)	Integrations (conventional unit)			Sample No. 2	Sample No. 33
Apolar structures	I i	–	–	0.77–0.88	1.6838	CH 3–C	IPDI	–	18
	I j + I j′ + I j′	–	–	0.93–1.24	2.8440	C–CH 2–C	IPDI	–	12
	I w	0.83–0.91	0.3591	–	–	CH 3–(CH2)2–CH2–N–	N-BDA	3	–
	I p + I p’	1.23–1.40	0.5098	–	–	CH3–(CH 2- ) 2–CH2–N–	N-BDA	4	–
	I c	1.41–1.64	–	–	0.7890	CH3–(CH2-)2–CH 2–N–	N-BDA	–	2
		–	–	2.24–2.28	0.3053	CH 3–N	N-MDA	–	3
	0.5·(I b + I b’ + I m)	3.32–3.4	12.5194	3.36–3.67	14.8291	O–CH 2–CH 2 –O (0.5 total amounts)	N-BDA	–	26
						O–CH 2–CH 2 –O (0.5 total amounts)	POG 2000	88	–
	I d	3.62–3.64	0.7310	–	–	Ar–CH 2 –Ar	MDI	4	–
	I k + I l	7.08–7.69	2.222	–	–	Ar	MDI	16	–
	I N		16.3413		20.4512			115	56
Polar structures	0.5·(I b + I b’ + I m)	3.32–3.4	12.5194	3.36–3.67	14.8291	–CH 2–NH–CO–	IPDI	–	4
						>CH–NH–CO–	IPDI	–	2
						O–CH 2–CH 2 –O (0.5 total amounts)	POG 600	–	26
						O–CH 2–CH 2 –O (0.5 total amounts)	POG 2000	88	–
						CH3–N–CH 2 –	N-MDA	–	2
						C3H7–CH 2–N	N-BDA	2	–
						CH 3–N–CH2–	N-MDA	–	3
	I e	3.93–4.02	0.8607	4.01–4.05	1.0000	–CH2–O–CO–NH–	CH2 with urethan groups	8	8
	I x	9–10.5	0.4597	7.5–8.5	0.1479	–NH–CO–O–	Urethan	4	4
	I P		13.8398		15.9773			102	49
κ theor (%)								47.0	46.7
κ exp (%)		45.86		43.86

MDI diphenylmethane diisocyanate, IPDI isophorone diisocyanate, POG polyoxyethylated polyols, N-MDA N-methyldiethanolamine, N-BDA N-butyldiethanolamine, N-PhDA N-phenyl-diethanolamine