Crystalline texture of injection-molded nylon 6

Injection‐molded specimens of nylon 6 were examined by x‐ray diffraction as a function of depth in three characteristic directions. A skin and a core were always found to be present which differed in the degree of crystalline perfection and crystal modification. While the core of pure nylon 6 was fo...

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Bibliographic Details
Published in:Journal of polymer science. Polymer physics edition 1974-05, Vol.12 (5), p.977-989
Main Authors: Mencik, Zdenek, Chompff, Alfred J.
Format: Article
Language:English
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Summary:Injection‐molded specimens of nylon 6 were examined by x‐ray diffraction as a function of depth in three characteristic directions. A skin and a core were always found to be present which differed in the degree of crystalline perfection and crystal modification. While the core of pure nylon 6 was found to be not oriented, the core of specimens containing nucleating agents was found to contain a typical texture of the monoclinic modification of nylon 6 in which the distribution probability of the a * and c * axes resembles ellipsoids with three unequal axes. A model explaining this texture as due to degenerated (deformed) spherulites is proposed. With a transcrystalline nylon 6 specimen the direction of the fastest growth in the unit cell (which forms the radius of spherulites) is found to be close to the a axis.
ISSN:0098-1273
1542-9385
DOI:10.1002/pol.1974.180120509