Premium
High modulus through lamellar structures nucleated by flow induced fibrous substrates
Author(s) -
Odell J. A.,
Grubb D. T.,
Keller A.
Publication year - 1979
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760190612
Subject(s) - lamellar structure , materials science , crystallization , modulus , composite material , elastic modulus , crystallography , chemical engineering , chemistry , engineering
Abstract 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.