Antistatic agent is an important component of functional additives for polymer materials. It is a type of additive that can reduce or eliminate static electricity generated by plastics. At present, research on antistatic agents at home and abroad is developing rapidly. Domestic research and development of antistatic agents started late. Compared with foreign countries, there is still a certain gap in the variety and quality of antistatic agents in my country. Domestic research directions are mainly focused on the development of high temperature resistance, strong durability, low toxicity or non-toxic antistatic agents. At the same time, the development of new multi-functional masterbatch is also attracting great attention, mainly focusing on In the aspects of non-ionic antistatic agents, compounding of antistatic agents and manufacturing of concentrated masterbatch.
To this end, on the basis of continuously improving the existing antistatic agent varieties, strengthening the research on the synergy between different antistatic agents, and striving to develop antistatic agents New varieties, especially combinations of antistatic agents and products with multiple functions, application technology has developed from the use of single antistatic agents to compound applications, thereby further expanding the scope of application of antistatic agents and promoting the direction of antistatic research in my country. higher level development.
The effect of various functional additives on the performance of composite antistatic agents was studied. Taking antistatic efficacy as the key indicator, a synergistic and long-lasting A high-performance multi-functional composite PE antistatic agent, which overcomes the shortcomings of a single additive not being able to meet production needs and the simultaneous presence of multiple additives leading to the cancellation of efficacy, and has good antistatic properties and mechanical properties. This technology can be widely used in the processing of polymer materials, mainly packaging materials, chemical industry and some electronic industries.
Main raw materials
Fatty acid monoglyceride, fatty amine polyoxyethylene ether, polyethylene glycol, oleic acid amide, erucic acid amide, hydroxyethyl ethylene bis stearamide (HEEBS): analytically pure;
Low density polyethylene (PE-LD): MB9500, industrial grade;
Polypropylene (PP): F300M, industrial grade;
Polyamide 6 (PA6): 6115, industrial grade.
Sample preparation
(1) Preparation of composite antistatic agent.
Make the raw materials of each component according to a certain mass ratio, mix them in a high-speed mixer at 50°C for 2 minutes, mix evenly, form a ball, and then cool Compound PE antistatic agent can be obtained by rolling and crushing it into granular form.
(2) Preparation of antistatic materials.
Add a certain amount of composite antistatic agent to PE-LD, PP and PA6 respectively, mix in a high-speed mixer at room temperature for 2 minutes, and mix evenly. The antistatic material is then extruded and granulated through a twin-screw extruder. The screw speed is 200 r/min. The extrusion temperature of the composite antistatic agent and PE-LD is 180-210°C, the extrusion temperature of PP is 180-220°C, and the extrusion temperature of PA6 is 210-240°C.
(3) Preparation of samples.
After drying PE-LD and PP antistatic materials at 105℃ for 1 h and PA6 antistatic material at 90℃ for 5 h, prepare the standard on the injection molding machine The injection molding process parameters of the sample are as follows: PE-LD and PP antistatic material sample preparation barrel temperatures are Zone 1: 200°C, Zones 2 to 3: 220°C, Zone 4: 230°C; PA6 antistatic material sample preparation material The cylinder temperature is zone 1: 220°C, zones 2 to 3: 240°C, and zone 4: 260°C; the injection pressure is 120 MPa; the mold temperature is 80°C; the holding time is 8 s; the cooling time is 10 s.
Properties of prepared materials
(1) Using volume resistivity, surface resistivity, tensile strength and notched impact strength as indicators, the effect of various functional additives on multifunctional composite resistance was studied. Based on the influence of the performance and mechanical properties of electrostatic agents, a synergistic and long-lasting multifunctional composite antistatic agent was developed.
(2) When the composite PE antistatic agent components are fatty acid monoglyceride, fatty amine polyoxyethylene ether, polyethylene glycol, oleic acid amide, mustard When the mass ratio of acid amide and HEEBS is 38:38:5:5:10:4, the antistatic performance is the best and the overall performance is the best.
(3) Select the best mass ratio of composite antistatic agents and add them to PE-LD, PP and PA6 respectively, and study the different qualities of composite PE antistatic agents Fractional antistatic against PE-LD, PP and PA6influence on electrical and mechanical properties. After comprehensively examining its antistatic properties and mechanical properties, it was finally determined that the mass fractions of the composite antistatic agent in PE-LD, PP and PA6 were 2.0%, 3.0% and 1.5% respectively.
