High‐Speed Melt Spinning of Syndiotactic‐Polystyrene; Improvement of Spinnability and Fiber Structure Development Via Bicomponent Spinning with Atactic‐Polystyrene

2005 ◽  
Vol 44 (4) ◽  
pp. 549-571 ◽  
Author(s):  
Yoshiaki Hada ◽  
Haruo Shikuma ◽  
Hiroshi Ito ◽  
Takeshi Kikutani
Keyword(s):  
High Speed ◽  
Melt Spinning ◽  
Syndiotactic Polystyrene ◽  
Fiber Structure ◽  
Structure Development ◽  
Atactic Polystyrene

scholarly journals Effect of Polycondensation Catalyst on Fiber Structure Development in High-Speed Melt Spinning of Poly (Ethylene Terephthalate)

Polymers ◽  
2019 ◽  
Vol 11 (12) ◽  
pp. 1931 ◽  
Author(s):  
Eun Seon Kim ◽  
Hyun Ju Oh ◽  
Hyun-Joong Kim ◽  
Chun Gi Kim ◽  
Seong Yoon Park ◽  
...  
Keyword(s):  
High Speed ◽  
Melt Spinning ◽  
Crystallization Rate ◽  
Structural Development ◽  
Melt Crystallization ◽  
Fiber Structure ◽  
Structure Development ◽  
Scanning Calorimetry ◽  
Pet Fibers ◽  
Induced Crystallization

We conducted a preliminary study on fiber structural development in the high-speed melt spinning of environmentally friendly polyethylene terephthalate (Ti-PET) synthesized with 25 ppm of titanium-based catalyst, which was compared with conventional PET (Sb-PET) synthesized with 260 ppm of antimony-based catalyst. Gel permeation chromatography of Ti- and Sb-PET resins of intrinsic viscosity 0.63 confirmed that both resins have similar molecular weights and distributions. However, differential scanning calorimetry revealed that the Ti-PET resin exhibited a lower melt–crystallization peak and isothermal melt-crystallization rate than the Sb-PET resin. High-speed melt spinning of the Ti- and Sb-PET was possible up to a spinning velocity of 6 km/min. Two-dimensional wide-angle X-ray diffraction analyses showed that the molecular orientation of the obtained as-spun Ti- and Sb-PET fibers increased with spinning velocity, and a highly oriented, crystalline structure by orientation-induced crystallization started to appear from 5 km/min. Notably, Ti-PET fibers showed a lower degree of crystalline structural development and lower tensile strength compared with Sb-PET fibers under the high-speed spinning conditions. Our results suggest that the catalyst in PET resins can act as nucleating agents in thermal- and orientation-induced crystallization, and that differences in catalyst content can influence PET fiber structure development under extreme conditions in high-speed melt spinning.

High-Speed Melt Spinning of Polylactide/Poly(Butyleneterephthalate) Bicomponent Fibers: Mechanism of Fiber Structure Development and Dyeing Behavior

2019 ◽  
Vol 58 (10) ◽  
pp. 828-846 ◽  
Author(s):  
Yutaka Kawahara ◽  
Motohiro Hanada ◽  
Shota Onosato ◽  
Wataru Takarada ◽  
Midori Takasaki ◽  
...  
Keyword(s):  
High Speed ◽  
Melt Spinning ◽  
Fiber Structure ◽  
Structure Development ◽  
Bicomponent Fibers

Fiber Structure Formation in High-speed Melt Spinning of Sheath-Core Type Bicomponent Fibers.

1995 ◽  
Vol 51 (9) ◽  
pp. 408-415 ◽  
Author(s):  
Takeshi Kikutani ◽  
Sadaaki Arikawa ◽  
Akira Takaku ◽  
Norimasa Okui
Keyword(s):  
Structure Formation ◽  
High Speed ◽  
Melt Spinning ◽  
Fiber Structure ◽  
Bicomponent Fibers
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