Preparation method of silicate modified polyvinyl chloride composite material

Abstract

The invention discloses a preparation method of a silicate modified polyvinyl chloride composite material, and belongs to the technical field of polymer materials. The preparation method comprises the following steps: weighing the following raw materials in parts by weight: 36.5 to 43.3 parts of polyvinyl chloride resin, 21.2 to 26.4 parts of plasticizer, 2.1 to 4.3 parts of soybean oil, 6 to 11 parts of flexibilizer, 7 to 12 parts of silicate, 0.7 to 1.5 parts of stabilizing agent, 5 to 10.2 parts of glass fiber, and 0.4 to 1.0 part of lubricant, then throwing the weighed raw materials into a high speed mixer, mixing for 7 to 10 minutes under a rotation speed of 800 to 900 n / min so as to obtain a mixed material; when the temperature of the high speed mixer reaches 73 to 76 DEG C, transferring the mixed material to a parallel double-screw extruder to carry out melting extrusion; cooling, cutting, drying, and finally packaging so as to obtain the finished product; wherein the screw temperatures of the double-screw extruder are as follows: 130 DEG C in zone one, 140 DEG C in zone two, 145 DEG C in zone three, 155 DEG C in zone four, 155 DEC C in zone five, 160 DEG C in zone six, 160 DEG C in zone seven, and 165 DEG C in zone eight. The tensile strength of the composite material is larger than 27 to 36 MPa, the bending strength is 35 to 48 MPa, the notch impact strength is larger than 8.7 to 11.6 kj / m2, and the thermal deformation temperature is 90 to 105 DEG C.

Description

technical field [0001] The invention belongs to the technical field of polymer material preparation, and in particular relates to a preparation method of a silicate-modified polyvinyl chloride composite material. Background technique [0002] Polyvinyl chloride is a thermoplastic with excellent performance. It has the advantages of good insulation performance, flame retardancy, excellent mechanical properties and strong chemical corrosion resistance. It is widely used in industrial and daily civilian fields. However, due to the disadvantages of heat-resistant fragility, poor stability and impact resistance of polyvinyl chloride, its wider use is limited to a certain extent. Silicate is a kind of inorganic particles with a layered structure. The unique layered structure can greatly improve the rigidity, dimensional stability and heat resistance of composite materials. Therefore, it is of positive significance to explore the modification of polyvinyl chloride by silicate. C...

AI Technical Summary

Problems solved by technology

However, due to the disadvantages of heat resistance, fragility, poor stability and impact resistance of polyvinyl chloride, its wider use is limited to a certain extent.