1 / 8

Practical Application of Intermolecular Forces

Practical Application of Intermolecular Forces. A Study of Adhesives. By Babi Hijau (Photo taken by own) [Public domain], via Wikimedia Commons. Intermolecular Forces. Forces between molecules Permanent dipoles Induced dipoles van der Waals or London Dispersion forces Hydrogen bonds.

kimberlie
Download Presentation

Practical Application of Intermolecular Forces

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Practical Application of Intermolecular Forces A Study of Adhesives By BabiHijau (Photo taken by own) [Public domain], via Wikimedia Commons

  2. Intermolecular Forces • Forces between molecules • Permanent dipoles • Induced dipoles • van der Waals or London Dispersion forces • Hydrogen bonds

  3. Applications • Determines various physical properties of a molecular solid • Melting point • Boiling point • Vapor pressure • Adhesive force of glue

  4. An adhesive is a substance that sticks to the surface of an object such that two surfaces become bonded. By Amirreza Saharkhiz (Own work) [CC BY-SA 3.0 (http://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons

  5. The adhesive will “wet” or cover the substrate, when the Intermolecular forces between the glue and the substrate are stronger than the Intermolecular forces between the glue and glue. By Mk2010 (Own work) [CC BY-SA 3.0 (http://creativecommons.org/licenses/by-sa/3.0) or GFDL (http://www.gnu.org/copyleft/fdl.html)], via Wikimedia Commons

  6. For an adhesive to wet a surface, the adhesive should have a lower surface tension, than the solid’s surface energy (or critical surface tension), By MesserWoland (own work created in Inkscape) [GFDL (http://www.gnu.org/copyleft/fdl.html), CC-BY-SA-3.0 (http://creativecommons.org/licenses/by-sa/3.0/) or CC BY-SA 2.5-2.0-1.0 (http://creativecommons.org/licenses/by-sa/2.5-2.0-1.0)], via Wikimedia Commons

  7. Adhesive Curing Once the adhesive is applied to the substrate, it will begin to cure, or form a permanent bond Different Adhesives have different mechanisms in which the curing takes place Theilr’s Flickr account – Creative Commons Attribution

  8. So HOW do glues compare? In the following lab you will investigate the differences in the adhesive ability of some different types of glues By Selena Wilke (Own work) [Public domain], via Wikimedia Commons

More Related