Preparation method for high-strength heat-proof polythene composite material

Abstract

The invention relates to a method for preparing high heat-resisting polyethylene composite materials. The method takes advantage of the feature that thermosetting resin has sound rigidity and strength under high temperature after curing, and by adding reaction compatibilizing agent to act with thermosetting resin to form a semi-interpenetrating network of polyethylene and thermosetting resin, and thereby preparing novel polyethylene composite materials. The polyethylene, thermosetting resin, curing agent, accelerating agent, reaction compatibilizing agent and antioxidant which are premixed evenly in a high-speed agitator are added into a double screw extruder, and reactively blended at a proper temperature and rotation speed, the produced granules are extruded out, and the desired high heat-resisting polyethylene composite materials are achieved. Compared with the common polyethylene, the heat resistance and the strength of the materials under normal temperature and high temperature are improved remarkably, and the materials can be applied to the fields of civil buildings, auto parts, household electrical appliances as well as wires and cables, and the like.

Description

technical field

[0001] The invention relates to a method for preparing a high-strength heat-resistant polyethylene composite material, in particular to a method for preparing a polyethylene composite material with good strength, high heat resistance and good reworkability within a certain time range. The invention belongs to the technical field of polymer processing. Background technique

[0002] Polyethylene is the variety with the highest output in the plastics industry. It has excellent low temperature resistance (the lowest operating temperature can reach -70°C-100°C), electrical insulation, chemical stability and toughness. The disadvantages are insufficient rigidity and poor heat resistance. Therefore, it is difficult to withstand higher loads and cannot be used at high temperatures.

[0003] In order to improve the strength and heat resistance of polyethylene materials, glass fiber reinforcement, cross-linking or dynamic vulcanization methods can be mainly used. The...