Structural evolution of Poly(ethylene terephthalate) fibers in high-speed in-line drawing process

被引：0
作者：
Hahm, Wan-Gyu [1 ]
Ito, Hiroshi [2 ]
Kikutani, Takeshi [3 ]
机构：
[1] Korea Inst Ind Technol, Text Innovat R&D Dept, Ansan 15588, South Korea
[2] Yamagata Univ, Grad Sch Organ Mat Sci, Yamagata 9928510, Japan
[3] Inst Sci Tokyo, Inst New Ind Incubat, Yokohama 2268501, Japan
来源：
POLYMER | 2025年 / 319卷
基金：
新加坡国家研究基金会;
关键词：
poly(ethylene terephthalate); Fibers; Melt spinning; Drawing; Structural evolution; Two-dimensional wide-angle X-ray diffraction (2D WAXD);
D O I：
10.1016/j.polymer.2024.128010
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
The structural evolution of poly(ethylene terephthalate) (PET) fibers under high strain rate drawing was investigated using high-speed in-line drawing process comprising three sequential zones: spinning (S), hot-drawing (D), and annealing (DA). PET fibers were drawn at take-up velocities of 5 and 6 km/min with draw ratios ranging from 1 to 2.5. Structural characterization was performed using two-dimensional wide-angle X-ray diffraction (2D WAXD), birefringence, and density measurements to investigate the evolution of the amorphous phase, oriented mesophase, and crystalline phases during the process. Fibers drawn in the D zone exhibited a highly oriented mesophase with a weak but sharp meridional (001 ') peak in their 2D WAXD patterns. Structural evolution into the crystalline phase occurred independently in the DA zone, where the oriented mesophase acted as a precursor to crystallization. The mechanical properties of the fibers were predominantly influenced by the fraction and orientation of the mesophase developed in the D zone.
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页数：12
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