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Low-viscosity high-modulus polymer composite material capable of in situ fiber formation enhancement of polymer

A composite material, in-situ fiber forming technology, applied in the field of high performance polymer matrix composite materials, can solve the problems of poor toughness of composite materials, large wear of processing equipment, small fiber aspect ratio, etc. High efficiency, low viscosity effect

Inactive Publication Date: 2017-06-13
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The present invention adopts in-situ fiber-forming technology to solve the problems of uneven fiber dispersion easily caused by directly adding fibers in polymers, poor toughness of composite materials, and greater wear and tear on processing equipment, but it also needs to solve the problem of in-situ fiber-forming fiber length. The problem of poor enhancement effect caused by small diameter ratio
Therefore, it is first necessary to solve the problem of small aspect ratio of fibers formed in situ

Method used

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  • Low-viscosity high-modulus polymer composite material capable of in situ fiber formation enhancement of polymer
  • Low-viscosity high-modulus polymer composite material capable of in situ fiber formation enhancement of polymer
  • Low-viscosity high-modulus polymer composite material capable of in situ fiber formation enhancement of polymer

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Tin fluorophosphate glass (Pglass, self-made, Tg 105±2°C, density 3.54g / cm3) and PA6 / 66 (C33 01, BASF, density 1.12 g / cm3, intrinsic viscosity 1.55dl / g, modulus 2200 MPa) are selected ) as the experimental raw material, and vacuum-dried at the corresponding temperature for use. The blend of PA6 / 66 and Pglass with a volume ratio of 90:10 was blended and granulated by a torque rheometer, and vacuum-dried before use. The blending temperature was 245°C, the time was 8 minutes, and the rotation speed was 60r / min;

[0041] The melt viscosity of the obtained PA6 / 66 / Pglass composite was significantly reduced, and the intrinsic viscosity of PA6 / 66 was 1.14±0.02dl / g. The modulus is 2360±10 MPa.

Embodiment 2

[0048] Tin fluorophosphate glass (Pglass, self-made, Tg 105±2°C, density 3.54g / cm3) and ethylene terephthalate (PET, BG 801, Yizheng chemical fiber, intrinsic viscosity 0.78dl / g, density 1.4 g / cm3) as the experimental raw material, and vacuum-dried at the corresponding temperature for use. The blend of PET and Pglass (PET-2) with a volume ratio of 98:2 was blended and granulated by a torque rheometer, and vacuum-dried before use. The blending temperature was 270°C, the time was 8 minutes, and the rotation speed was 60r / min;

[0049] The melt viscosity of the obtained PET / Pglass composite material was significantly reduced, and the intrinsic viscosity of PET was 0.48±0.01 dl / g. The modulus is 2600±10 MPa.

Embodiment 3

[0051] Tin fluorophosphate glass (Pglass, self-made, Tg 105±2°C, density 3.54g / cm3) and ethylene terephthalate (PET, BG 801, Yizheng chemical fiber, intrinsic viscosity 0.78dl / g, density 1.4 g / cm3) as the experimental raw material, and vacuum-dried at the corresponding temperature for use. The blend of PET and Pglass (PET-4) with a volume ratio of 96:4 was blended and granulated by a torque rheometer, and dried in vacuum before use. The blending temperature was 270°C, the time was 8 minutes, and the rotation speed was 60r / min;

[0052] The melt viscosity of the obtained PET / Pglass composite material is obviously reduced, the intrinsic viscosity of PET is 0.43±0.01 dl / g and the modulus is 2720±10 MPa.

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Abstract

The invention discloses a low-viscosity high-modulus polar polymer composite material prepared from tinfluorophosphate glass having low glass transition temperature, and mechanical properties of a nonpolar polymer can be improved by in situ fiber formation. By a melt blending method, influence of different temperatures and ratios on the interaction of phosphate glass and a polar polymer and properties of a polar polymer based composite material is researched, and the low-viscosity high-modulus polar polymer based composite material is obtained. The prepared low-viscosity high-modulus polar polymer based composite material as a fiber formation phase is added to the non-polar polymer, melt processing is performed, and in the processing process, certain shear and biaxial tensile force fields are applied to a polar polymer based composite material melt in the non-polar polymer matrix by certain force assembling units; under the action of the force fields, the in situ fiber formation of the polar polymer based composite material is achieved, and the mechanical properties of the non-polar polymer can be significantly improved.

Description

technical field [0001] The invention belongs to the technical field of high-performance polymer-based composite materials, and in particular relates to a low-viscosity high-modulus polymer composite material capable of in-situ fiber-reinforced polymers. Background technique [0002] The use of polymer fibers to reinforce polymer materials has been widely studied. Fibers can greatly improve the mechanical properties of polymers. However, adding fibers directly to polymers can easily cause uneven fiber dispersion, poor toughness of composite materials, and damage to processing equipment. Problems such as greater wear and tear. In the research process, the general methods to solve such problems are as follows: [0003] (1) Adding a compatibilizer: The addition of a compatibilizer can greatly increase the interaction between the polymer fiber and the matrix and improve its dispersion in the matrix, but it will lead to a decrease in the elongation at break of the composite mater...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/00C08L67/02C08K3/40C08L23/12B29C47/92B29C48/92
CPCC08K3/40B29C48/92B29C2948/92704C08L23/12C08L77/00C08L67/02
Inventor 吴宏刘帅郭少云李环
Owner SICHUAN UNIV