Polyethylene composition, and high-density polyethylene product and preparation method thereof
A high-density polyethylene and composition technology, which is applied in the field of polyethylene composition and high-density polyethylene products and their preparation, can solve the problems of easy oxidation of technical powder, poor mechanical properties of materials, high price, etc., and achieve good mechanical properties , Excellent antistatic performance
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preparation example Construction
[0021] Taking the preparation of grafted polyethylene as an example, the grafted polyethylene can be prepared by the following method: polyethylene (especially low-density polyethylene) and polar monomers and initiators in a reactive twin-screw extruder Extrude in. Wherein, the method of extruding the polyethylene, polar monomer and initiator in a reactive twin-screw extruder is well known to those skilled in the art. For example, these three raw materials can be mixed uniformly, and then sent to a reactive twin-screw extruder for extrusion; it is also possible to mix the initiator and polar monomer first, and then mix the mixture of the two with polyethylene. extrude. Wherein, when the mixture of the initiator and the polar monomer is a liquid, it can be continuously added in proportion to the extruder through a liquid feeder during the extrusion process; when the mixture of the initiator and the polar monomer is a solid , the mixture of initiator and polar monomer can be m...
preparation example 1
[0041] Dicumyl peroxide (DCP, initiator, Beijing Doxin Fine Preparation Factory, the same below) and glycidyl methacrylate (GMA, polar monomer, technical grade, Luoyang Hengguang Chemical Co., Ltd.) with 1: The weight ratio of 12 is mixed and dissolved to obtain the mixed liquid of polar monomer and initiator. Using the reaction type twin-screw extruder of German WP company, under the condition of temperature of 180 ℃, melt and extrude low-density polyethylene (the LD100AC brand purchased from Yanshan Petrochemical, the same below), and at the same time in the extrusion process The mixed solution of above-mentioned polar monomer and initiator is carried out real-time metering feeding (relative to the low density polyethylene of 100 weight parts, the feed rate of the mixture of described polar monomer and initiator is 2 weight parts by liquid feeding device / min); wherein, the extrusion temperature is 180°C, the screw speed is 200rpm, and the extrusion rate is 250g / min. The mo...
preparation example 2
[0043] 100 parts by weight of low-density polyethylene, 4 parts by weight of maleic anhydride (MAH, a polar monomer, Beijing Yili Fine Chemicals Co., Ltd.), and 0.1 parts by weight of dicumyl peroxide were uniformly mixed to obtain a mixture. Then this mixture is sent in the reaction type twin-screw extruder of German WP company, and melt extrusion under the temperature of 180 ℃; min. The modified polyethylene A2 is thus obtained, based on the total weight of the modified polyethylene A2, the structural unit content of the polar monomer is 3.8% by weight.
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