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. Author manuscript; available in PMC: 2012 Feb 1.
Published in final edited form as: Eur Polym J. 2011 Feb 1;47(2):162–170. doi: 10.1016/j.eurpolymj.2010.11.007

Table 2.

Volumetric shrinkage, pore fraction and extraction results for all different compositions photoactivated for 600 s.

TEGDMA
content
(mol%)		 Pore
fraction
before
extraction
(nm3)		 Pore
fraction
after
extraction
(nm3)** 		BisGMA
content in
extract
(mol%)* 		Mass
extracted
(%)* 		BisGMA
content
in gel
(mol%)* 		Volumetric
shrinkage
(%)
100 2.32 (0.11)a 2.12 (0.20) 0 0.2 0 11.7 (1.0)a
80 2.19 (0.01)ab 2.24 (0.26) 43 0.3 19.9 9.5 (0.6)b
60 2.09 (0.01)ab 2.14 (0.04) 69 0.4 39.9 7.5 (0.4)c
40 2.01 (0.01)b 2.05 (0.04) 76 8.5 58.6 6.0 (0.7)cd
20 1.99 (0.01)b 1.99 (0.19) 93 24.5 76.1 5.4 (0.7)d
0 2.08 (0.01)b 2.02 (0.10) 100 45.8 100 3.5 (0.3)e
*

Standard deviations for the percentage values were all below 0.01%.

**

All statistically similar (p=0.0313).