Polyhedral oligomeric silsesquioxanes, often abbreviated POSS®, PSS or POS, are hydrid materials composed of an inner, rigid, silica cage structure surrounded by more flexible organic groups. The organic groups can be selected to impart solubility of the POSS molecule and to tune the properties. Visually, the POSS molecule looks like filler particles and many consider it to be a kind of molecular filler or the smallest possible silica particle. Here is a 3D ray traced video animation I made of octaisobutyl POSS using POV-Ray. Yes, it was tedious, but I think the results speak for themselves.
Polyhedral Oligomeric Silsequioxane (POSS) Enhanced Plastics (Chapter 23)
C. DeArmitt, Functional Fillers for Plastics, 2nd Edition, Editor Professor M. Xanthos, Wiley-VCH, 2010.
Polyhedral Oligomeric Silsesquioxanes in Plastics (Chapter 5)
C. DeArmitt, Applications of Polyhedral Oligomeric Silsesquioxanes, Editor C. Hartman-Thompson, Springer Press, 2011.
POSS keeps high temperature plastics flowing
C. DeArmitt & P. Wheeler, Plastics Additives & Compounding (Elsevier), 10, 4, 36-39 (2008).
Polyhedral Oligomericsilsequioxanes: Additives for Unique Cosmetic Properties
C. DeArmitt Cosmetics & Toiletries (Allured Publishing), 123, 8, 51-56 (2008).
POSS® is a registered trademark of Hybrid Plastics Inc.
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