In Situ Analysis of Melt-Drawing Behavior of Ultrahigh Molecular Weight Polyethylene Films with Different Molecular Weights: Roles of Entanglements on Oriented Crystallization

2015 ◽  
Vol 119 (15) ◽  
pp. 5062-5070 ◽  
Author(s):  
Satomi Kato ◽  
Hidekazu Tanaka ◽  
Takeshi Yamanobe ◽  
Hiroki Uehara
Keyword(s):  
Molecular Weight ◽  
Ultrahigh Molecular Weight Polyethylene ◽  
In Situ Analysis ◽  
Polyethylene Films ◽  
Molecular Weights ◽  
Oriented Crystallization ◽  
Ultrahigh Molecular Weight

scholarly journals A Novel Ziegler–Natta-Type Catalytic System—TiCl4/2,2′-Dimethoxy-1,1′-Binaphthalene/Et3Al2Cl3/Bu2Mg for Production of Ultrahigh Molecular Weight Polyethylene Nascent Reactor Powders, Suitable for Solvent-Free Processing

Polymers ◽  
2018 ◽  
Vol 10 (11) ◽  
pp. 1281 ◽  
Author(s):  
Olga Serenko ◽  
Mikhail Buzin ◽  
Vladislav Tuskaev ◽  
Svetlana Gagieva ◽  
Nikolay Kolosov ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Catalytic System ◽  
High Strength ◽  
Ultrahigh Molecular Weight Polyethylene ◽  
Melting Behavior ◽  
Solvent Free ◽  
X Ray Diffraction ◽  
Molecular Weights ◽  
Ultrahigh Molecular Weight ◽  
Different Temperatures

A series of ultrahigh molecular weight polyethylenes with viscosity-average molecular weights in the range of 1.6–5.6 × 106 have been prepared by using a novel Ziegler–Natta-type catalytic system—TiCl4/2,2′-dimethoxy-1,1′-binaphthalene/Et3Al2Cl3/Bu2Mg at different temperatures (Tpoly) in the range between 10 and 70 °C in toluene. The morphology of the nascent reactor powders has been studied by scanning electron microscopy, wide-angle X-ray diffraction, and the DSC melting behavior. Polymers are suitable for the modern processing methods—the solvent-free solid-state formation of super high-strength (tensile strength over 1.8–2.5 GPa) and high-modulus (elastic modulus up to 136 GPa) oriented film tapes. With decrease of Tpoly, the drawability of the reactor powders increased significantly.

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