Modification method for decommissioned composite insulator silicone rubber and application of modified composite insulator silicone rubber in polypropylene composite

Abstract

The invention belongs to the technical field of polymer materials, and particularly relates to a modification method for decommissioned composite insulator silicone rubber and application of modifiedcomposite insulator silicone rubber in a polypropylene composite. The modification method comprises the following steps: immersing the decommissioned composite insulator silicone rubber in concentrated hydrochloric acid / concentrated nitric acid / concentrated sulfuric acid, stirring for 2 to 10 hours, adding water and stirring for 1 to 5 hours, filtering and washing until a filtrate is neutral, soaking filter residues in an organic solvent for 1 to 3 hours, filtering, and drying to obtain the composite insulator silicone rubber; and treating the surface of the composite insulator silicone rubberby a plasma surface treatment instrument to obtain the plasma-treated composite insulator silicone rubber.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a method for modifying silicone rubber of decommissioned composite insulators and its application in polypropylene composites. Background technique [0002] Polypropylene (PP) is a non-toxic, odorless, tasteless milky white highly crystalline polymer with a density of only 0.90--0.91g / cm 3 , is currently one of the lightest varieties of all plastics. It is especially stable to water, the water absorption rate in water is only 0.01%, the molecular weight is about 80,000-150,000, and the formability is good. It has high melting point, high strength, high heat resistance, high wear resistance and low creep, and also has excellent properties such as good tensile strength, yield strength, rigidity, stress resistance and electrical insulation. Since its industrialization in 1957, it has become the fastest-growing variety of general-purpose resins due to its exce...

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Problems solved by technology

[0005] Aiming at the problems of recycling of composite insulator silicone rubber materials and poor flame-retardant effect of polypropylene in the prior art, the present invention provides a method for modifying decommissioned composite insulator silicone rubber and the modified composite insulator silicone rubber compounded with polypropylene It can effectively improve the flame retardancy and mechanical properties of polypropylene

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