Preparation method of PIPD (poly[2,6-diimidazo-(4,5-b:4'5'-e)pyridinylene-1,4-(2,5-dihydroxy)phenylene]) fiber

A phenylene pyridine and diimidazole technology, which is applied in the field of high-performance fiber preparation, can solve the problems that PPA cannot be quickly and effectively removed, the control of the draw ratio of the primary filaments is unstable, and the fiber structure and performance are affected. Phosphorus content, the effect of preventing stretching

A phenylene pyridine and diimidazole technology, which is applied in the field of high-performance fiber preparation, can solve the problems that PPA cannot be quickly and effectively removed, the control of the draw ratio of the primary filaments is unstable, and the fiber structure and performance are affected. Phosphorus content, the effect of preventing stretching

CN105350108AActive Publication Date: 2016-02-24CHINA BLUESTAR CHENGRAND CO LTD
12 Cites 3 Cited by

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A method for preparing poly[2,5-dihydroxy-1,4-phenylene pyridodiimidazole] fibers, comprising the following steps: stretching the PIPD / PPA liquid crystal solution through an air gap, cooling in a quench chamber, and phosphoric acid aqueous solution The poly[2,5-dihydroxy-1,4-phenylenepyrididimidazole] fiber is obtained through the processes of coagulation, washing, multi-stage gradual drying, heat treatment and winding.

Embodiment 2

[0045] A method for preparing poly[2,5-dihydroxy-1,4-phenylene pyridodiimidazole] fibers, comprising the following steps: stretching the PIPD / PPA liquid crystal solution through an air gap, cooling in a quench chamber, and phosphoric acid aqueous solution The poly[2,5-dihydroxy-1,4-phenylenepyrididimidazole] fiber is obtained through the processes of coagulation, washing, multi-stage gradual drying, heat treatment and winding.

[0046] The air gap stretching is as follows: after the PIPD / PPA liquid crystal solution is metered by a metering pump, it is sent to the spinning assembly, and after being extruded from the spinneret, the primary filaments are stretched and oriented in an air gap at a temperature of 180°C. .

Embodiment 3

[0048] A method for preparing poly[2,5-dihydroxy-1,4-phenylene pyridodiimidazole] fibers, comprising the following steps: stretching the PIPD / PPA liquid crystal solution through an air gap, cooling in a quench chamber, and phosphoric acid aqueous solution The poly[2,5-dihydroxy-1,4-phenylenepyrididimidazole] fiber is obtained through the processes of coagulation, washing, multi-stage gradual drying, heat treatment and winding.

[0049] The air gap stretching is as follows: after the PIPD / PPA liquid crystal solution is metered by a metering pump, it is sent into the spinning assembly, and after being extruded from the spinneret, the primary filaments are stretched and oriented in an air gap at a temperature of 200°C. .

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
lengthaaaaaaaaaa
compressive strengthaaaaaaaaaa
shear modulusaaaaaaaaaa
Login to View More

Abstract

The invention relates to a preparation method of PIPD (poly[2,6-diimidazo-(4,5-b:4'5'-e)pyridinylene-1,4-(2,5-dihydroxy)phenylene]) fiber and belongs to the technical field of preparation of high-performance fiber. The PIPD fiber is obtained through air gap stretching, cooling in a quenching chamber, phosphoric solution curing, washing, multi-level gradual drying, heat treatment and coiling of a PIPD / PPA (polyphthalamide) liquid crystal solution. According to the method, the drawing rate of as-spun fiber can be stably controlled; meanwhile, most of PPA in the as-spun fiber can be rapidly and effectively removed; moisture in the as-spun fiber of PIPD can be slowly removed, and high-performance PIPD fiber with a good structure is obtained.

Description

technical field [0001] The present invention relates to a preparation method of fiber, more specifically, the present invention relates to a preparation method of poly[2,5-dihydroxy-1,4-phenylenepyridodiimidazole] (PIPD) fiber, which belongs to high Technical field of performance fiber preparation. Background technique [0002] In 1998, the Akzo Nobel Institute in the Netherlands (AkzoNobel) successfully developed poly[2,5-dihydroxy-1,4-phenylenepyridinediimidazole] (PIPD) fibers and applied for the basic patent US5674969. PIPD fiber has excellent mechanical properties: the tensile strength and tensile modulus are 5GPa and 330GPa respectively, reaching or even partially surpassing the PBO fiber known as the "King of Organic Fibers"; the compressive strength is close to that of carbon fiber, up to 1.7GPa, which is the current organic fiber. The best fiber; the excellent interfacial properties make its shear modulus about 6GPa. In addition, PIPD fiber also has excellent ligh...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
24 Feb 2016
Publication
CN105350108A
IPC
D01F6/74; D06L1/12; D01D10/02; D01D10/06
CPC
D01D10/02; D01D10/06; D01F6/74; D06L1/12
Inventors
付兴伟; 范新年