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A preparation method of powdered polyethylene toughened cast nylon

A technology for casting nylon and polyethylene, which is applied in the field of polymer material preparation, casting nylon and its preparation, can solve problems such as material brittleness, and achieve the effects of improving wear resistance, improving impact strength and improving toughness.

Active Publication Date: 2020-01-21
ANHUI UNIVERSITY OF ARCHITECTURE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, an obvious disadvantage of the existing cast nylon is that the material is relatively brittle and has obvious low temperature sensitivity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] (1) Dissolve 100 grams of granular high-density polyethylene (HDPE 5000S) and 1000 milliliters of toluene in a boiling state of toluene to form a uniform solution, stop heating after the dissolution, and then slowly add ethanol dropwise until no powdered precipitate occurs, filter. The polyethylene powder obtained by filtration was vacuum-dried to constant weight.

[0017] (2) Preparation of reaction raw materials: 100 parts of caprolactam, 20 parts of powdered polyethylene, 5 parts of catalyst, 0.3 parts of toluene diisocyanate, 0.4 parts of molybdenum disulfide;

[0018] Distill the caprolactam monomer at 155°C for 20 minutes under reduced pressure, then add toluene diisocyanate and molybdenum disulfide, add the catalyst solid sodium hydroxide and powdered polyethylene under stirring, and quickly pour it into a mold preheated to 165°C , polymerize for 20 minutes and start to cool and release the mold.

[0019] The obtained polyethylene toughened cast nylon is tested...

Embodiment 2

[0021] In Example 1, the catalyst solid sodium hydroxide was changed to solid sodium methoxide, and other conditions remained unchanged to obtain polyethylene toughened cast nylon.

[0022] The obtained polyethylene toughened cast nylon is tested through experiments: tensile strength (MPa) is 79, notched impact strength (KJ / m2) 63.8, adopts MM-200 type testing machine to friction and wear in dry friction state, load 200 Newton, experiment The time is 60 minutes, and the amount of wear (mm) is 4.0.

Embodiment 3

[0024] The polyethylene HDPE 5000S in Example 1 was changed to HDPE 7000F, and other conditions remained unchanged to obtain polyethylene toughened cast nylon.

[0025] The obtained polyethylene toughened cast nylon is tested through experiments: tensile strength (MPa) is 77, notched impact strength (KJ / m2) 66.2, adopts MM-200 type experimental machine to friction and wear in dry friction state, load 200 Newton, experiment The time is 60 minutes, and the amount of wear (mm) is 3.8.

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Abstract

The invention discloses a preparation method of powdered polyethylene toughened monomer casting (MC) nylon. The preparation method comprises the following steps: preparing blending materials of toughened MC nylon and polyethylene, dissolving polyethylene in boiling toluene by using different high-density polyethylene raw materials, then dropwise adding ethanol, and carrying out sedimentation to obtain powdered polyethylene. When the powdered polyethylene is added into the MC nylon, the notch impact performance and the wear resistance of the material can be obviously improved on the basis thatthe tensile strength of the material is hardly reduced.

Description

technical field [0001] The invention relates to cast nylon and a preparation method thereof, in particular to a preparation method of powdered polyethylene toughened cast nylon, which belongs to the field of polymer material preparation. Background technique [0002] MC (Monomers casting) nylon is also called cast nylon. The production process of cast nylon is simple, the molecular weight is large, and the performance is excellent. It can replace non-ferrous metals such as copper and palladium and their alloys. As one of engineering plastics, MC nylon products have many unique properties such as light weight, high strength, self-lubricating, wear-resistant, anti-corrosion, insulation, etc. It replaces steel with plastic, has excellent performance, and is widely used in almost all industrial fields. , plays an important role in national economic construction. It has outstanding advantages in the production of large-scale and complex-structure parts, such as large-diameter c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L77/02C08L23/06C08K3/30C08G69/14C08J3/14
CPCC08G69/14C08J3/14C08J2323/06C08K2003/3009C08L77/02C08L2207/062C08L23/06C08K3/30
Inventor 王峰陈晓明解玉琪
Owner ANHUI UNIVERSITY OF ARCHITECTURE