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van der Waals force |
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van der Waals force [′van dər ‚wȯlz ‚fȯrs] (physical chemistry) An attractive force between two atoms or nonpolar molecules, which arises because a fluctuating dipole moment in one molecule induces a dipole moment in the other, and the two dipole moments then interact. Also known as dispersion force; London dispersion force; van der Waals attraction. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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Also, the attempt to use science to give "phase angle" or "tan delta" would apply to the spring and dashpot model, but cannot be used for the viscoelastic model of a rubber where the viscosity is due to the need to do work to move neighboring elements held attracted by Van der Waal's forces and elasticity is the entropy effect of stretched chains returning to a random configuration. |
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