Chapter 4. Solid-State Properties
Some commercial polymers, particularly polyolefins, are highly crystalline materials with well-defined morphology consisting of chain-folded lamella joined in supramolecular structures called spherulites. Although single crystals of some polymers such as polyethylene can be grown under laboratory conditions, no bulk polymer is completely crystalline. In the case of semicrystalline polymers, regular crystalline units are linked by unoriented, random-conformation chains that constitute amorphous regions. Other polymers may have very low crystallinity characterized by poorly defined crystalline microstructure in an amorphous matrix. An important example of commercial polymer with low crystallinity is poly(vinyl ...
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