Table 4.

Chemical composition of the volatiles present in the headspace of liquid material from irradiated p(NiPMAm) hydrogels.

No.	tret., min	Compound	Molecular Formula	Method of Identification	Prob. (%)	Area, %
						60 °C	90 °C	120 °C	150 °C
1.	5.03–5.62	Heptane and related compounds		MS	76.6	76.3	77.4	49.3	1.9
2.	6.76–7.34	Ethyl isobutyrate and related compounds		MS	78.3	13.9	19.2	42.4	38.9
3.	8.01	2-hydroxypropanenitrile	C3H5NO	MS	95.8	-	0.2	0.6	-
4.	9.51	1-methyl-1.2.4-triazole	C3H5N3	MS	66.2	0.2	0.7	0.2	0.6
5.	9.80	4-ethoxy-2-pentanone	C7H14O2	MS	97.0	-	-	-	0.2
6.	9.89	N-(n-propyl)acetamide	C5H11NO	MS	80.9	0.7	-	-	5.1
7.	10.23	2-pentanone	C5H10O	MS	53.1	-	-	-	0.5
8.	10.82	Cyanuric acid	C3H3N3O3	MS	83.2	0.4	-	-	2.1
9.	10.95	N-Isopropylcyclopropanecarboxamide	C7H13NO	MS	81.0	0.2	-	0.7	29.9
10.	11.01	2.2’-azobis(2-methylpropionitrile)	C8H12N4	MS	64.7	8.3	2.5	5.2	18.3
				Total identified (%)		100.0	100.0	98.4	97.5

t_ret.: Retention time; MS: constituent identified by mass-spectra comparison.