Patent
Process for the production of polymer filaments having high tensile strength
Paul Smith,Lemstra Pieter Jan,Robert Kirschbaum,Jacques P. L. Pijpers +3 more
- 18 Oct 1982
66
TL;DR: In this paper, an improved process for the preparation of polymer filaments having a high tensile strength and modulus by spinning a solution of high-molecular weight polymer and thereafter stretching the filament thus formed was presented.
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Abstract: PROCESS FOR THE PRODUCTION OF POLYMER FILAMENTS HAVING HIGH TENSILE STRENGTH ABSTRACT OF THE DISCLOSURE An improved process for the preparation of polymer filaments having a high tensile strength and modulus by spinning a solution of high-molecular weight polymer and thereafter stretching the filament thus formed. A solution of an ethylene polymer or copolymer, containing at least 80 percent by weight solvent, is spun at a temperature above the gel point of the solution. The ethylene polymer or copolymer contains at most about 5 percent by weight of an alkene having 3 to 8 carbon atoms, has a weight-average molecular weight Mw higher than 4 x 105 kg/kmole, and has a weight/number average molecular weight ratio Mw/Mn lower than 5. The spun polymer solution, is thereafter cooled to a temperature below its gel point to form a gel filament, which gel filament is thereafter strenght to form a polymer filament having a tensile strength of at least about 1.5 GPa at room temperature.
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Citations
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TL;DR: In this paper, high molecular weight copolymers of ethylene and 0.5-10 mole percent branched α-olefins are disclosed, and a method for making the polymers with a cyclopentadienyl metallocene catalyst system is presented.
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References
Patent
Process for making polymer filaments which have a high tensile strength and a high modulus
Paul Smith,Lemstra Pieter Jan +1 more
- 06 Feb 1980
TL;DR: In this paper, a process for making polymer filaments which have a high tensile strength and a high modulus by stretching a polymer filament which contains an appreciable amount of polymer solvent at a temperature between the swelling point and the melting point of the polymer.
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