Induction/dispersion interactions molecular mechanics

The selection of the solvent is based on the retention mechanism. The retention of analytes on stationary phase material is based on the physicochemical interactions. The molecular interactions in thin-layer chromatography have been extensively discussed, and are related to the solubility of solutes in the solvent. The solubility is explained as the sum of the London dispersion (van der Waals force for non-polar molecules), repulsion, Coulombic forces (compounds form a complex by ion-ion interaction, e.g. ionic crystals dissolve in solvents with a strong conductivity), dipole-dipole interactions, inductive effects, charge-transfer interactions, covalent bonding, hydrogen bonding, and ion-dipole interactions. The steric effect should be included in the above interactions in liquid chromatographic separation. 

Types of AppI ied Stress. Mechanical behavior of polymer-based materials depends on composition, structures, and interactions at molecular and super-molecular levels (5-7). The structures are much dependent on primary chemical (mostly covalent) bonding inside the chains and secondary bonding (dispersion van der Waals, induction, electrostatic, and hydrogen bonding, the last being the strongest in this category) forces in between chains (8). The composition often includes additives aimed at an improvement of a particular property. 

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