Curated OER
Investigation of Crystallinity in Polymeric Materials
A kaleidoscope is constructed using polarizing polymer paper and then low-density polyethylene, high-density polyethylene, and polypropylene are all melted onto individual glass slides and examined through a microscope. The intent is to...
University of Pennsylvania
University of Pennsylvania: Solid State Chemistry: Describing Crystalline Solids
This site contains in-depth information on crystalline solids. Includes basic concepts, pictures, learning graphs, and useful tools.