Coupling agent modified calcium carbonate filled polypropylene plastic and preparation method thereof

Abstract

The invention discloses a coupling agent modified calcium carbonate filled polypropylene plastic and a preparation method thereof. The coupling agent modified calcium carbonate filled polypropylene plastic comprises the following components in parts by weight: 100 parts of polypropylene, 10-20 parts of calcium carbonate, and 0.1-0.3 part of coupling agent, wherein the coupling agent preferably consists of 10-30 parts of gamma-chloropropyltriethoxysilane, 50-70 parts of isopropyl tri(dioctylphosphate)titanate and 10-30 parts of Polyethyleneglycol trimethoxysilylpropyl ether. According to the invention, calcium carbonate is modified by adding the coupling agent so that the surface of calcium carbonate changes from hydrophilicity into lipophilicity and then can be tightly combined with polypropylene, and the performances of a plastic material are improved; furthermore, the coupling agent is preferable so that the viscosity is reduced, and each mechanical property is better; and the coupling agent modified calcium carbonate filled polypropylene plastic has the advantages of good tensile strength, elongation at break, notch impact strength, thermal deformation temperature and Rockwell hardness.

Description

technical field [0001] The invention relates to a plastic material and a preparation method thereof, in particular to a coupling agent modified calcium carbonate filled polypropylene plastic and a preparation method thereof. Background technique [0002] Polypropylene, abbreviated as PP, CAS number: 9003-07-0. It is a thermoplastic resin obtained by polymerizing propylene. It was first put into industrial production in Italy in 1957, and it is another important plastic variety after polyethylene (PE). It has good heat resistance, and it will not be destroyed when it is cooked at 135°C for 1000 hours. The specific heat capacity and thermal conductivity of PP are smaller than that of PE, but its thermal insulation is better than that of PE. PP is a non-polar polymer with excellent dielectric and electrical insulation properties. The electrical properties are basically not affected by ambient humidity and electric field frequency. Within the allowable operating range, the inc...

AI Technical Summary

Problems solved by technology

Adding inorganic fillers such as calcium carbonate to plastics can improve the heat resistance, wear resistance, dimensional stability and rigidity of the product, and reduce the cost of the product, but the powder is added to the polymer material without treatment, and the filler and There is an obvious interface between the polymers, just like there are many cavities in the matrix resin, the effective cross-sectional area that can withstand the external force is reduced under the action of external force, and the mechanical properties of the filling material are deteriorated

[0004] In addition, polymer particles are usually used in the production process, which are mixed with inorganic powder and then formed, which can easily cause uneven mixing of materials and affect the performance of the product.