Structure and properties of polyimide (BTDA-TDI/MDI co-polyimide) fibers obtained by wet-spinning

2011 ◽  
Vol 19 (7) ◽  
pp. 645-653 ◽  
Author(s):  
Hong Bing Xiang ◽  
Zhong Huang ◽  
Li Qi Liu ◽  
Lei Chen ◽  
Jing Zhu ◽  
...  
Keyword(s):  
Wet Spinning ◽  
Structure And Properties ◽  
Polyimide Fibers

Preparation of R-BABP Polyimide Fibers via Wet Spinning of Polyamide Acid

2020 ◽  
Vol 869 ◽  
pp. 266-272
Author(s):  
Gleb Vaganov ◽  
Andrei Didenko ◽  
Elena Ivan’kova ◽  
Elena Popova ◽  
Vladimir Elokhovskii ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Ethylene Glycol ◽  
Coagulation Bath ◽  
Wet Spinning ◽  
Structure And Properties ◽  
Polyimide Fibers ◽  
Thermal Imidization ◽  
Morphology And Mechanical Properties

A polyamide acid (PAA) based on diamine 4,4'-bis (4-aminophenoxy) diphenyl and 1,3-bis (3',4-dicarboxyphenoxy) benzene dianhydride was synthesized. PAA fibers were obtained by wet spinning. Then, these fibers were converted into polyimide by thermal imidization. Dependence of the structure and properties of fibers on the die drawing and the composition of the coagulation bath was studied. It is shown that the composition of the coagulation bath has a significant effect on the morphology and mechanical properties of polyimide (PI) fibers. To obtain defect-free fibers, a coagulation bath consisting of ethylene glycol/ethanol at 50/50 vol. % was found to be optimal. An increase in the die drawing of fibers from 1 to 2 times leads to an increase in tensile strength and strain at break of the polyimide fibers.

Preparation and Properties of Alginate Fibre

2011 ◽  
Vol 335-336 ◽  
pp. 419-422 ◽  
Author(s):  
Yuan Lian ◽  
Jian Yi Wu ◽  
Da Peng Zhou ◽  
Hong Mei Wang ◽  
Dian Wu Huang ◽  
...  
Keyword(s):  
Research Direction ◽  
Biological Properties ◽  
Wet Spinning ◽  
Structure And Properties ◽  
Important Research ◽  
Preparation Technology ◽  
Thermal Gravimetric Analyzer ◽  
Infrared Spectrometer ◽  
Medical Materials ◽  
Important Research Direction

Alginate fibre has attracted great attention in the area of biological medical materials due to its unique biological properties. But its low tenacity greatly hinders its application area. Therefore, the preparation technology of alginate fibre has been as an important research direction in this area in recent years. The purpose of this article is to prepare the calcium alginate fibre with good properties by wet spinning. The structure and properties of this fibre are analyzed by scanning electron microscope，infrared spectrometer，thermal gravimetric analyzer and DSC.

Structure and properties of polyimide fibers containing benzimidazole and Amide Units

2014 ◽  
Vol 53 (3) ◽  
pp. 183-191 ◽  
Author(s):  
Chaoqing Yin ◽  
Jie Dong ◽  
Zixin Zhang ◽  
Qinghua Zhang ◽  
Jinyou Lin
Keyword(s):  
Structure And Properties ◽  
Polyimide Fibers

The Effects of Surfactants on the Spinnability, Structure and Properties of Dry-jet Wet Spinning Poly(m-phenylene isophalamide) Fiber

2020 ◽  
Vol 21 (7) ◽  
pp. 1438-1443
Author(s):  
Qianli Liu ◽  
Kaikai Cao ◽  
Shikai Qi ◽  
You Yang ◽  
Shuheng Liang ◽  
...  
Keyword(s):  
Wet Spinning ◽  
Structure And Properties

Influences of Coagulation Conditions on the Structure and Properties of Regenerated Cellulose Filaments via Wet-Spinning in LiOH/Urea Solvent

2018 ◽  
Vol 6 (3) ◽  
pp. 4056-4067 ◽  
Author(s):  
Cuibo Qiu ◽  
Kunkun Zhu ◽  
Xin Zhou ◽  
Longbo Luo ◽  
Jie Zeng ◽  
...  
Keyword(s):  
Wet Spinning ◽  
Regenerated Cellulose ◽  
Structure And Properties

Influence of draw ratio on the structure and properties of PEDOT-PSS/PAN composite conductive fibers

RSC Advances ◽  
2014 ◽  
Vol 4 (76) ◽  
pp. 40385-40389 ◽  
Author(s):  
Xin Li ◽  
Yin Liu ◽  
Zhenghao Shi ◽  
Congju Li ◽  
Guangming Chen
Keyword(s):  
Sulfonic Acid ◽  
Draw Ratio ◽  
Wet Spinning ◽  
Structure And Properties ◽  
Polystyrene Sulfonic Acid ◽  
Conductive Fibers

Composite conductive fibers based on poly(3,4-ethylenedioxythiophene)-polystyrene sulfonic acid (PEDOT-PSS) solution blended with polyacrylonitrile (PAN) were obtained via wet spinning.

scholarly journals Structure and Properties of Dope-Dyed Poly(m-phenylene isophthalamide) Fibers By Wet Spinning

2013 ◽  
Vol 25 (7) ◽  
pp. 3952-3956
Author(s):  
Li-Qi Liu ◽  
Lei Chen ◽  
Zu-Ming Hu ◽  
Jun-Rong Yu ◽  
Jing-Zhu
Keyword(s):  
Wet Spinning ◽  
Structure And Properties

The preparation and characterization of a heterocyclic meta-aramid fiber with outstanding thermal stability

2020 ◽  
pp. 095400832097441
Author(s):  
Kaikai Cao ◽  
Yufeng Liu ◽  
You Yang ◽  
Feng Yuan ◽  
Jin Wang ◽  
...  
Keyword(s):  
Degradation Process ◽  
Aramid Fiber ◽  
Wet Spinning ◽  
Degradation Behavior ◽  
Structure And Properties ◽  
Ordered Structure ◽  
Elongation At Break ◽  
Air Atmosphere ◽  
Thermal Degradation Behavior

A heterocyclic meta-aramid fiber containing benzimidazole structure was prepared by the low-temperature polycondensation of m-phenylenediamine, 2-(4-aminophenyl)-5-benzimidazole, and isophthaloyl dichloride, followed by dry-jet wet spinning. The structure and properties of the heterocyclic modified meta-aramid (h-aramid for short) were explored and compared with poly(isophthaloylmetaphenylene diamine) (m-aramid for short). H-aramid exhibits excellent spinnability. The surface of the fiber is smooth and even, with a partially ordered structure. Mechanical properties, thermal resistance, and flame retardant of h-aramid are significantly enhanced as the introduction of benzimidazole can not only increase the rigidity of molecular chains but also strengthen hydrogen bonds and act as physical crosslinking points. The strength and modulus of h-aramid are up to 0.84 GPa and 16.66 GPa, respectively, with an elongation at break of 20%. The glass transition temperature and melting temperature of h-aramid reach 302°C and 356°C, respectively, about 30°C and 40°C higher than that of m-aramid. Temperature of 10 wt% weight loss under nitrogen and air atmosphere is 17°C and 39°C higher than those of m-aramid. Besides, the thermal degradation behavior of h-aramid was studied, and its degradation process and mechanism was proposed.

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