Table 2.

Minimized energy of the components.

Energy contributor	Ethyl cellulose	Hypromellose	PEG	ATN
Total energy	51.256	−34.461082	10.321	64.638
Valence energy	−7.845	−39.120	0.212	180.903
Bond	3.495	7.319	0.013	9.030
Angle	26.171	37.840	0.042	28.565
Torsion	−37.510	−84.279	0.157	141.902
Inversion	0.0	0.0	0.0	1.406
Valence energy	−14.435	−19.909	0.0	−14.280
Stretch-stretch	0.087	0.209	0.0	0.159
Stretch-bend-stretch	−1.134	−1.634	0.0	−2.829
Stretch-torsion-stretch	−0.098	−0.063	0.0	−3.541
Separated-stretch-stretch	0.0	0.0	0.0	0.178
Torsion-stretch	−0.703	−0.465	0.0	−11.348
Bend-bend	0.192	0.069	0.0	0.171
Torsion-bend-bend	−5.743	−7.456	0.0	−0.763
Bend-torsion-bend	73.535	−10.568	0.0	3.692
Nonbond energy				−101.985
Van der Waals	5.507	0.196	−0.076	16.049
Electrostatic	68.029	24.371	10.186	−118.034