Abstract
AbstractOur earlier work on this series has shown that the processing history, e.g., melt‐extrusion, freeze‐grinding, or solution precipitation of virgin nylon 6 leads to a marked increase in the crystallization rate. Similar studies have now been extended to several other polymers. Results indicate that the processing history effects on the crystallization rate are most pronounced for polymers with high intermolecular forces, e.g. nylon 6, nylon 66, nylon 6/66, nylon 11, and nylon 12. Interestingly, polymers of intermediate polarity, e.g., polyethylene terephthalate (PET) and chlorotrifluoroethylene (CTFE)/vinylidene fluoride (VDF) copolymer (96/4, Aclar®) also reveal similar effects although to a much lesser extent. On the other hand, non‐polar polymers, e.g. polyethylene, are not influenced in terms of crystallization behavior by the processing history.
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