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Co-extrusion preparation method of polymer functionally gradient materials (FGM) and products

A technology of gradient functional materials and polymers, which is applied in the preparation of continuous and rapid blending and extruding polymers or polymer-based gradient functional material products, and the preparation of gradient functional material products, achieving the effect of simple process and easy control

Inactive Publication Date: 2012-08-29
HENAN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to realize the gradient control of material composition and function in the usual polymer co-extrusion molding process. Gradient control of the composition, thereby providing a simple gradient control, low production energy consumption, single and convenient production process (single project, One process), continuous extrusion of profiles and products of complex shapes, continuous and efficient production process, and industrial implementation Co-extrusion preparation method of polymer gradient functional material products

Method used

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  • Co-extrusion preparation method of polymer functionally gradient materials (FGM) and products
  • Co-extrusion preparation method of polymer functionally gradient materials (FGM) and products
  • Co-extrusion preparation method of polymer functionally gradient materials (FGM) and products

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Experimental program
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Effect test

Embodiment 1

[0026] Embodiment 1: High-density polyethylene (HDPE) and polyoxyethylene (PEO) are weighed respectively by the mass percentage of 75:25, add the feeding device of SHJ-20B twin-screw extruder after fully mixing by mixing machine, extrude The temperature of the discharge barrel is set and controlled at 110-185°C from the solid conveying section to the melt conveying section (exit) [the outlet temperature is set according to (T 2 +T 1 ) / 2 setting]; the shaping mold is a fishtail sheet mold designed and manufactured by the inventor, and the mold is composed of an upper and lower mold body and is insulated with a heat insulating material, wherein the temperature T of the upper mold body 1 Set and control at 160°C, while the temperature of the lower die body T 2 Set and control at 210°C, ⊿T=T formed in the extrusion mold cavity 2 -T 1 = 50°C temperature gradient field; the extruder extrudes a 0.5mm thick molten sheet at a speed of 300mm / min, and then passes through a ⊿T' tempera...

Embodiment 2

[0027] Embodiment 2: Weigh polymethyl methacrylate (PMMA), polyoxyethylene (PEO) and functional additive carbon black (CB) respectively by the mass percentage of 55: 45: 1.5, add after fully mixing by mixing machine The feeding device of the IMC-1663 single-screw extruder, the temperature of the barrel of the extruder is set and controlled at 110-205°C from the solid conveying section to the melt conveying section (exit); the upper and lower mold bodies of the shaping mold are insulated The material is insulated, where the temperature of the upper die body T 2 Set and control at 230°C, while the temperature of the lower die body T 1 Set and control at 180°C to form ⊿T=T in the extrusion mold cavity 2 -T 1 = 50°C temperature gradient field; the extruder extrudes a 1mm thick molten sheet at a speed of 300mm / min, and then passes through a ⊿T'=60°C established and controlled by a far-infrared heater and a high-temperature air blowing device After the temperature gradient field,...

Embodiment 3

[0028] Embodiment 3: High density polyethylene (HDPE) and polyphenylene sulfide (PPS) are weighed respectively by the mass percentage of 70: 30, add the feeding device of SHJ-20B twin-screw extruder after fully mixing by mixing machine, The temperature of the barrel of the extruder is set and controlled at 130-300°C from the solid conveying section to the melt conveying section (outlet); body and is insulated with heat insulating material, where the temperature T of the upper mold body 1 Set and control at 280°C, while the temperature of the lower die body T 2 Set and control at 320°C, ⊿T=T formed in the extrusion mold cavity 2 -T 1 = 40°C temperature gradient field; the extruder extrudes a 0.5mm thick molten sheet at a speed of 300mm / min, and then passes through a ⊿T'=50°C temperature gradient field larger than the mold cavity, and then in the shaping device The gradient functional sheet is made by cooling and shaping; this specific temperature gradient field is establishe...

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Abstract

The invention discloses a co-extrusion preparation method of polymer functionally gradient materials (FGM) and products, which comprises the following steps: (1) preparing two or more kinds of polymers according to the certain mass percent, mechanically mixing the prepared raw materials, and then, adding the mixture into a screw extruder; (2) at the shaping phase of the co-extrusion process of the mixture, setting a certain temperature gradient field (delta T) for the blending melt which flows in a shaping mold; (3) enabling the shaped molding object which is extruded out of the shaping mold and is in the melting state to pass through a same or different certain temperature gradient field (delta T'); and (4) leading the molding object into a forming mold quickly by a traction device, and cooling the molding object below the melting point within a very short time. The invention has the advantage of providing a method capable of industrialized implementation for preparing polymers or polymer functionally gradient materials (FGM) and products by using traditional equipment and technology for processing polymers.

Description

(1) Technical field [0001] The invention relates to a preparation method of a polymer mixture or a gradient functional material product of a polymer mixture or a mixture of a polymer and a functional additive, in particular to a preparation method capable of continuously and rapidly blending and extruding a polymer or a polymer-based gradient functional material product . It belongs to the technical field of polymer material processing. (2) Background technology [0002] Functional Graded Materials (FGM) is a new concept in the field of materials science. It is firstly used as a thermal stress relaxation material with high heat insulation for the body and engine of the space shuttle. It was developed by Japanese scientists in Introduced in the late 1980s. It is to solve the bad effect that the laminated material will peel off and fall off at the interface due to the huge thermal stress at the joint surface (interface) caused by the difference in the linear expansion coeffi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C47/00B29C47/92B29C47/12B29C47/78B29C48/30B29C48/875B29C48/92
CPCB29C48/875B29C48/865
Inventor 戴亚辉阎新萍戴嘉懿
Owner HENAN POLYTECHNIC UNIV