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Solid state extrusion of semicrystalline polymers
Author(s) -
Krjutchkov A. N.,
Dorfman I. Y.,
Prut E. V.,
Enikolopyan N. S.
Publication year - 1986
Publication title -
polymer composites
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.577
H-Index - 82
eISSN - 1548-0569
pISSN - 0272-8397
DOI - 10.1002/pc.750070603
Subject(s) - materials science , extrusion , crystallinity , composite material , polymer , solid state , polymer science , engineering physics , engineering
The dynamics of solid state extrusion of polypropylene, high density polyethylene, and poly(tetrafluorethylene) have been investigated at various extrusion temperatures and piston velocities. A model of solid state extrusion of semicrystalline polymers is proposed. The formulae are obtained relating the value of the extrusion pressure with the parameters of the process and polymer properties. It has been found that for certain values of the parameters, defects of two main types emerge. A mechanism of defect formation is suggested.