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Method for improving performance of polysulfone polyamide fiber crystallization by utilizing ultrasonic wave field

A technology of polysulfone amide and ultrasonic field, which is applied in the direction of ultrasonic/sonic fiber treatment, can solve the problems of slow crystallization rate, low crystallinity, and poor mechanical properties of fibers, and achieve the effect of increasing crystallinity and improving mechanical properties

Inactive Publication Date: 2012-06-27
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention is based on the field-induced effect theory, using pulsed magnetic field and ultrasonic field to treat polysulfone amide, so as to improve the crystallization performance of polysulfone amide and make up for the slow crystallization rate, low crystallinity and mechanical properties of polysulfone amide fiber. Disadvantages of poor performance

Method used

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  • Method for improving performance of polysulfone polyamide fiber crystallization by utilizing ultrasonic wave field
  • Method for improving performance of polysulfone polyamide fiber crystallization by utilizing ultrasonic wave field

Examples

Experimental program
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Effect test

Embodiment 1

[0011] Embodiment 1: get polysulfone amide fiber 15 (length is 10cm) impregnated in DMAc / H 2 O mixed solution (the mass fraction of DMAc is 40%), the polysulfone amide fiber soaked in the mixed solution was placed in a blast drying oven at 20° C. for heat treatment, and the treatment time was 60 minutes. Use XRD to characterize the crystallization properties of the fiber after treatment, the corresponding XRD spectrum is shown in figure 1 (a).

Embodiment 2

[0012] Embodiment 2: get polysulfone amide fiber 15 (length is 10cm) impregnated in DMAc / H 2 O mixed solution (the mass fraction of DMAc is 40%), the polysulfoneamide fiber soaked in the mixed solution was placed in an ultrasonic field with a power of 1200W, the treatment temperature was 20°C, and the treatment time was 10min. Use XRD to characterize the crystallization properties of the fiber after treatment, the corresponding XRD spectrum is shown in figure 1 (b).

Embodiment 3

[0013] Embodiment 3: This implementation is basically the same as that of Embodiment 2, except that the ultrasonic treatment time is 30 minutes. The corresponding XRD spectrum is shown in figure 1 (c).

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Abstract

The invention relates to a method for improving the performance of polysulfone polyamide fiber crystallization by utilizing the ultrasonic wave field, comprising the following steps: dipping the polysulfone polyamide fiber in the mixed solution of DMAc and H2O, wherein, the mass percent of DMAc and H2O in the mixed solution is 30-70%; placing the dipped polysulfone polyamide fiber in the ultrasonic wave field with the power of 200W-2000W; and processing for 5-300min at the temperature of 10 DEG C to 50 DEG C. The crystallization degree of the processed polysulfone polyamide by the method of the invention is improved by 10-40%. The invention provides a new thinking for research of influence of external field to polymer crystallization and prolongation of the applied range of polysulfone polyamide fiber, and has certain theoretical research value and market application value.

Description

technical field [0001] The invention relates to a method for improving the crystallization properties of polysulfoneamide fibers, in particular to a method for improving the crystallization properties of polysulfoneamide fibers by using an ultrasonic field. Background technique [0002] Polymer is a kind of soft matter, and the most typical feature of soft matter is that it is easy to respond to changes in the external field. By controlling the type and strength of the external field, the aggregate structure of soft matter can be changed, thereby affecting its crystallization properties. Van Gisbergen J.G.M. et al. (Van Gisbergen J.G.M, Meijer H E H, Lenstra P J.Polymer, 1989,30:2153~2157.) studied the crystallization effect of γ-irradiation on PP / EPDM; Gedye R. et al. (Gedye R , Smith F, Westaway K, et al.TetrahedronLett.1986,27,279) first reported the application of microwave technology in the polymer field; Khamad S.I. et al. (Khamd S I, Popova E N, Salina Z I, et al.Depo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M10/02
Inventor 刘丽
Owner SHANGHAI UNIV