Experimental study demonstrates high-modulus polyethylene strands via controlled lamellar crystallization, indicating that extreme molecular chain extension is not required for high stiffness.
Extremely high modulus (up to 10 11 Nm −2 ) strands of poly ethylene have been prepared by the controlled crystallization of lamellar overgrowths onto a small quantity of preformed flow‐induced microfibrils. The requirements for achieving a high modulus from a lamellar system are considered, and indicate that high chain extensions may not be needed. The lamellae satisfying these requirements possess a unique taper, the outer edges having a fold length of less than 40Å. This raises new issues relating to crystallization in confined spaces, and space filling by lamellae in bulk samples in general.
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Odell et al. (1979) studied this question.
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