Structure development during polymer processing: Studies of the melt spinning of polyethylene and polypropylene fibers

1975 ◽  
Vol 15 (9) ◽  
pp. 660-667 ◽  
Author(s):  
Joseph E. Spruiell ◽  
James L. White
Keyword(s):  
Melt Spinning ◽  
Polymer Processing ◽  
Polypropylene Fibers ◽  
Structure Development

Effects of molecular weight distribution on the melt spinning of polypropylene fibers

1985 ◽  
Vol 5 (2) ◽  
pp. 95-124 ◽  
Author(s):  
Qingrong Fan ◽  
Duanfu Xu ◽  
Delu Zhao ◽  
Renyuan Qian
Keyword(s):  
Molecular Weight ◽  
Molecular Weight Distribution ◽  
Weight Distribution ◽  
Melt Spinning ◽  
New Technology ◽  
Polypropylene Fibers ◽  
Structure Development ◽  
Basic Study ◽  
Spun Fiber ◽  
End Uses

Abstract A basic study of melt spinning of polypropylene is reported. This study is aimed at developing a new technology for the manufacture of fine denier polypropylene fibers for clothing end uses. It was found that the molecular weight of the polypropylene resin has-a key influence on structure development in the fiber spinline. By aiming at achieving a smectic structure of the as-spun fiber through a controlled degradation of polypropylene, we can spin fine denier good quality polypropylene fibers at temperatures below 280°C and speeds up to 2000 meters/minute.

Structure and tensile properties of Nanoclay-Polypropylene fibers produced by melt spinning

2011 ◽  
Vol 121 (1) ◽  
pp. 410-419 ◽  
Author(s):  
Loganathan Rangasamy ◽  
Eunkyoung Shim ◽  
Behnam Pourdeyhimi
Keyword(s):  
Tensile Properties ◽  
Melt Spinning ◽  
Polypropylene Fibers

Modeling of structure development during polymer processing

2008 ◽  
Vol 50 (5) ◽  
pp. 538-549 ◽  
Author(s):  
Jean -Marc Haudin ◽  
J. Smirnova ◽  
L. Silva ◽  
B. Monasse ◽  
J. -L. Chenot
Keyword(s):  
Polymer Processing ◽  
Structure Development

scholarly journals Biodegradable and Biocompatible Polyhydroxyalkanoates (PHA): Auspicious Microbial Macromolecules for Pharmaceutical and Therapeutic Applications

2018 ◽  
Author(s):  
Martin Koller
Keyword(s):  
Tissue Engineering ◽  
Melt Spinning ◽  
Degradation Products ◽  
Nerve Repair ◽  
Polymer Processing ◽  
Anti Cancer ◽  
Negative Effect ◽  
Processing Techniques

Polyhydroxyalkanotes (PHA) are bio-based microbial biopolyesters with stiffness, elasticity, crystallinity and degradability tunable by the monomeric composition, bio-production strategy and post-synthetic processing; they display biological alternatives for diverse technomers of petrochemical origin. This, together with the fact that their monomeric and oligomeric in vivo degradation products do not exert any toxic or elsewhere negative effect to living cells or tissue of humans or animals, makes them highly stimulating for various applications in the medical field. The article provides an overview of PHA application in the therapeutic, surgical and tissue engineering area, and reviews strategies to produce PHA at purity levels high enough to be used in vivo. Tested applications of differently composed PHA and advanced follow-up products as carrier materials for controlled in vivo release of anti-cancer drugs or antibiotics, as scaffolds for tissue engineering, as guidance conduits for nerve repair or as enhanced sutures, implants or meshes are discussed from both a biotechnological and a material-scientific perspective. Particular attention is devoted to the adaptation of traditional polymer processing techniques for production of medicine-related devices based on PHA, such as melt-spinning, melt extrusion, or solvent evaporation, and to emerging processing techniques like 3D-printing, computer-aided wet-spinning, laser perforation, or electrospinning.

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