Special-purpose material for beta nucleater modified random copolymerization polypropylene pipe and preparation method thereof

Abstract

The invention discloses special material for a Beta nucleating agent modified polypropylene random copolymer pipe product and the preparation method thereof. The invention includes special material components according to the parts by weight as follows: 50 to 80 parts of polypropylene random copolymer, 5 to 30 parts of polypropylene homopolymer, 10 to 30 parts of inorganic mineral filling agent, 1 to 6 parts of ethylene propylene acid copolymer, 0.5 to 3 parts of metal oxide, 0.1 to 0.3 parts of coupling agent, and 0.1 to 0.5 parts of processing aid. All components are mixed according to the quantity measurement disclosed by the invention, graining is extruded through the fusing of a twin-screw squeezing unit, and the special material for the Beta nucleating agent modified polypropylene random copolymer pipe product of the invention can be prepared. The special material for the Beta nucleating agent modified polypropylene random copolymer pipe product provided by the invention has the advantages that the impact resilience, the heat endurance and the creep resistance are prominent, and the special material can be used to produce cold-hot water delivery pipe products and other hot fluid medium chemical pipelines.

Description

technical field [0001] The invention belongs to the technical field of plastic materials, and in particular relates to a special material for random copolymerized polypropylene pipe material modified by a beta nucleating agent and a preparation method thereof. Background technique [0002] Polypropylene homopolymer (PP-H) has excellent heat resistance and rigidity, and its no-load operating temperature can reach above 130°C. It is widely used in the manufacture of pipelines for conveying hot water and chemical pipelines for conveying other hot fluid media. Its impact resistance is not good at low temperature or even at room temperature, and it is easy to be brittle at low temperature. Random copolymerized polypropylene (PP-R) is a copolymer obtained from propylene and ethylene with a mass content of 3.0-7.0% at a certain temperature, pressure and catalyst. The ethylene monomers are randomly distributed in the long chain of propylene, changing the main The regular state of t...

AI Technical Summary

Problems solved by technology

The current disadvantages of random copolymerized polypropylene pipe materials are: the notched impact strength is not high, the thermal expansion coefficient is large when the temperature is higher than 95 ° C, and the temperature is less than 100 ° C and the lower working pressure is very obvious. Creep phenomenon, poor UV resistance, and its moldability, rigidity and heat resistance need to be improved

Generally, the α-nucleating agent increases the crystallinity of polypropylene, thereby increasing the rigidity, while the overall impact strength shows a downward trend. The β-nucleating agent greatly increases the content of β-crystal in polypropylene, and the unique bundle-like aggregation structure of β-crystal When the force is applied, a crack band is produced, which greatly increases the toughness, but the tensile strength and tensile modulus will decrease