Method for preparing anti-ultraviolet ageing poly-p-phenylene-benzobisoxazole (PBO) fiber

A benzobisoxazole and anti-ultraviolet aging technology, which is applied in the fields of fiber chemical characteristics, spinning solution preparation, rayon manufacturing, etc., can solve the problems of affecting, restricting the application of PBO fibers, and reducing the mechanical properties of fibers, so as to improve the optical properties. Stabilize performance, improve photostability performance, improve the effect of UV resistance performance

Inactive Publication Date: 2009-04-01
DONGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Although PBO fiber has good mechanical properties and heat resistance, the mechanical properties of PBO fiber will be greatly reduced under the irradiation of ultraviolet-visible light, which greatly affects or limits the application of PBO fiber in the field of advanced composite materials. application in

Method used

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  • Method for preparing anti-ultraviolet ageing poly-p-phenylene-benzobisoxazole (PBO) fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Polymerize and spin by the method described in Comparative Example 1, the difference is that 0.1149g of anti-ultraviolet agent TM is added to the polymerization system, the fineness of the prepared fiber is 4.8dtex, the tensile strength is 3.3GPa, and the elongation at break The growth rate is 5.1%.

[0022] After the PBO fiber was irradiated with ultraviolet light for 100 hours, the strength retention rate was 65%.

Embodiment 2

[0024] Polymerize and spin by the method described in Comparative Example 1, the difference is that 0.5745g of anti-ultraviolet agent TM is added to the polymerization system, the fineness of the prepared fiber is 4.6dtex, the tensile strength is 3.4GPa, and the elongation at break The growth rate is 4.8%.

[0025] After the PBO fiber was irradiated with ultraviolet light for 100 hours, the strength retention rate was 80%.

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Abstract

The invention relates to a preparation method of an ultraviolet and aging resistant poly (p-phenylenebenzobisoxazole) (PBO) fiber, which comprises the steps that: DAR question mark 2HCl (DAR), terephthalic acid (TA), phosphoric anhydride (P2O5) and polyphosphoric acid (PPA) (wherein, the mole ratio between the DAR and the TA is 1 to 1) are heated for dissolving under the protection of inert gases, added with an ultraviolet resisting agent, TM, for reaction for 5 hours to 7 hours under the pressure of 0.2MPa to 1.0MPa and the temperature of 110 DEG C to 120 DEG C; the pressure in a reaction kettle is eliminated and reaction is carried out for 6 hours to 7 hours in vacuum; then reaction materials are extruded by adopting a two-screw or single-screw extruder, and the dry jet-wet spinning technique is adopted. The PBO fiber obtained by the method has better ultraviolet resisting performance without affecting the mechanical property of the PBO fiber and the preparation method improves and promotes the light stability of the PBO fiber as well as composite materials thereof.

Description

technical field [0001] The invention belongs to the field of preparation of poly-p-phenylene benzobisoxazole (PBO) fibers, in particular to a preparation method of anti-ultraviolet aging poly-p-phenylene benzobisoxazole (PBO) fibers. Background technique [0002] Poly-p-phenylenebenzobisoxazole fiber, (referred to as PBO fiber, the same below) is one of the high-performance fibers with the most excellent comprehensive properties in the field of high-performance fibers. It has excellent mechanical properties, heat resistance, and flame retardancy. , Solvent resistance, etc. Such as PBO fiber" "For example, its tensile strength is 5.8GPa, tensile modulus is 300GPa, twice that of PPTA fiber, Zylon also has excellent thermal stability (thermal decomposition temperature up to 650 ℃) and flame retardancy (LOI = 68).PBO fiber has a very broad application prospect and important application value in aerospace, protective materials, national defense and military, sports equipment, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/94D01F1/10D01D1/02
Inventor 金俊弘胡大勇张涛杨胜林李光江建明
Owner DONGHUA UNIV
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