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Preparation method of nylon modified ultra high molecular weight polyethylene blended material

A technology of ultra-molecular weight and polyethylene, which is applied in the field of preparation of polyethylene modified materials, can solve problems such as poor heat resistance and surface hardness, and achieve the effect of increasing bonding force and improving notched impact strength

Pending Publication Date: 2018-06-19
哈尔滨盛洋塑胶材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of poor heat resistance and poor surface hardness of UHMW-PE prepared in the prior art, and to provide a method for preparing nylon-modified ultra-molecular weight polyethylene blended materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0014] Specific implementation mode one: this implementation mode is a kind of preparation method of nylon modified ultramolecular weight polyethylene blend material, specifically is finished according to the following steps:

[0015] 1. Pretreatment: Weigh 70 parts of paraffin oil, 30 parts of UHMW-PE and 1 part of fumed silica in parts by weight, mix and granulate at a temperature of 185-195°C to obtain pretreated UHMW-PE;

[0016] 2. Drying: Dry the existing PA6 at a temperature of 110°C for 4 hours to obtain dry PA6;

[0017] 3. Prepare raw materials: Weigh 1 to 30 parts of dry PA6, 60 to 98 parts of pretreated UHMW-PE, 0.01 to 0.5 parts of nucleating agent and 1 to 10 parts of solubilizer as raw materials; the solubilizer It is a copolymer containing carboxyl group and acid anhydride group;

[0018] 4. Extrusion molding: Add the materials prepared in step 1 into the high-speed mixer in turn, and mix them evenly in the high-speed mixer to obtain the mixed material mixture...

specific Embodiment approach 2

[0026] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the solubilizer is high-density polyethylene grafted with maleic anhydride. Others are the same as the first embodiment.

[0027] In this embodiment, high-density polyethylene grafted maleic anhydride is used as a compatibilizer, and high-density polyethylene grafted maleic anhydride (PE–HD-g-MAH) can react with PA6 to generate PA6-g-PE–HD, forming The grafts can effectively increase the interfacial cohesion of the material, so that PA6 in the system can form a more stable combination with the UHMW-PE matrix. When the material is subjected to external force, it absorbs and dissipates energy in the process of interface debonding, cavitation, and matrix shear yielding, so as to achieve the purpose of heat resistance, toughening, and improvement of processability. At the same time, in order to better obtain high-performance co- For mixing, we use the method of adding a compatibilizer to make two...

specific Embodiment approach 3

[0029] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: the nucleating agent is calcium stearate or wollastonite. Others are the same as those in Embodiment 1 or 2.

[0030]Wollastonite is used as a nucleating agent, the particle size of the wollastonite is 5nm-50nm, and the surface area is 100m 2 / g~400m 2 / g, which can well compensate for the reduction in mechanical properties.

[0031] Using calcium stearate as a nucleating agent, calcium stearate can achieve solid adsorption on the surface of the resin, so that the undeformed long-chain alkyl can shield the force between chain breaks, and also reduce the force caused by the displacement movement of chain breaks. The steric hindrance forms an incompatible interface, which is conducive to the mutual diffusion of resin particles, reduces the force between molecules, reduces the interfacial tension between the components of the material and the aggregation of the dispersed phase size, and ensu...

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PUM

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Abstract

The invention provides a preparation method of a nylon modified ultra high molecular weight (UHMW) polyethylene (PE) blended material and relates to a preparation method of a high-temperature-resisting and easy-to-process polyethylene modified material, aiming at solving the problems of UHMW-PE prepared in the prior art that the heat resistance is poor and the surface rigidity is poor. The preparation method comprises the following steps: 1, pre-treating to obtain pre-treated UHMW-PE; 2, drying to obtain dry PA6 (Polyamide 6); 3, preparing a raw material; 4, sequentially adding the materials into a high-speed mixing machine and uniformly mixing; then extruding and molding a uniformly-mixed material mixture by utilizing a same-direction rotary double-screw extruder, so as to obtain the nylon modified ultra high molecular weight polyethylene blended material. The preparation method provided by the invention has the advantages that a high molecular compatibilization technology is adoptedso that the binding force is good and the binding force between interface layers is increased; the Vicat softening temperature reaches 195.8 DEG C and the Shore hardness reaches 103. The preparation method provided by the invention is mainly used for preparing the nylon modified ultra high molecular weight polyethylene blended material.

Description

technical field [0001] The invention relates to a preparation method of a high-temperature resistant and easy-to-process polyethylene modified material. Background technique [0002] Ultra-high molecular weight polyethylene (UHMW-PE) is a thermoplastic engineering plastic with a linear structure and excellent comprehensive properties. It has good properties such as wear resistance, chemical corrosion resistance, low temperature resistance, and self-lubrication. It can replace metal materials as anti-wear materials. It is widely used in textile, medical, metallurgy, electric power, coal and transportation and other fields. Although UHMW-PE has many excellent properties, the large molecular weight and linear structure make it have a very long molecular chain, which makes UHMW-PE melt viscosity high and melt processing difficult. At the same time, UHMW-PE has low surface hardness and heat resistance. The shortcomings such as poor performance make it unable to meet the specifi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L91/06C08L77/02C08L51/06C08K3/36C08K5/098C08K3/34
CPCC08L23/06C08L2205/035C08L2205/24C08L2207/068C08L91/06C08L77/02C08L51/06C08K3/36C08K5/098C08K3/34
Inventor 刘振雷刘明鑫郭广蕲郭琳郭宇
Owner 哈尔滨盛洋塑胶材料有限公司
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