Developing an ecologically friendly isothermal bath to obtain a new class high-tenacity and high-modulus polypropylene fibers

作者：Avci H; Kotek R^*; Yoon J

来源：Journal of Materials Science, 2013, 48(22): 7791-7804.

DOI：10.1007/s10853-013-7427-1

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 (a) up to 0.6 generating superior mechanical properties. After drawing at draw ratios of 1.49 at 120 A degrees C, highly oriented crystalline and amorphous phases were achieved for the drawn fibers with f (c) and f (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 A degrees C.

• 出版日期2013-11