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Developing an ecologically friendly isothermal bath to obtain a new class high-tenacity and high-modulus polypropylene fibers
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Developing an ecologically friendly isothermal bath to obtain a new class high-tenacity and high-modulus polypropylene fibers
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Journal Article
Developing an ecologically friendly isothermal bath to obtain a new class high-tenacity and high-modulus polypropylene fibers
2013
Overview
A number of production methods have been developed for high-performance fibers; however, most processes use toxic solvents or generate a lot of unwanted by-products. Our research resulted in the development of a new family of high-performance polypropylene (PP) fibers by utilizing a simple, ecologically friendly bath (ECOB). Various commodity polymers can be used with ECOB melt spinning system at high throughputs and performance benefits. Our treated as-spun PP fibers had a highly oriented, but not crystalline precursor morphology with [f.sub.a] up to 0.6 generating superior mechanical properties. After drawing at draw ratios of 1.49 at 120°C, highly oriented crystalline and amorphous phases were achieved for the drawn fibers with [f.sub.c] and [f.sub.a] values of 0.95 and 0.87, respectively. This fine structure for ECOB-treated fibers resulted in tenacity close to 12 g/d, initial modulus higher than 150 g/d, and ultimate elongation at break of 20 %. The polymer melting point of the new fibrillar PP fibers increased by 9°C.
Publisher
Springer
Subject
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