Application of carboxylic acid metal salt of tetrahydrophthalic anhydride as nucleating agent for polypropylene beta crystal form

Abstract

The invention provides an application of a carboxylic acid metal salt of tetrahydrophthalic anhydride as a nucleating agent for a polypropylene beta crystal form. By adopting the carboxylic acid metal salt of tetrahydrophthalic anhydride as the nucleating agent, the generation of beta crystal form polypropylene can be induced efficiently; as tested by differential scanning calorimetry (DSC), the content of a beta crystal form is up to 86-97.7 percent; after nucleation modification by using the carboxylic acid metal salt of the tetrahydrophthalic anhydride, the punching strength of polypropylene is increased by 5-8 times, the heat deflection temperature is increased greatly, and high mechanical property is achieved; and moreover, the carboxylic acid metal salt has the advantages of chemical stability, high dispersity, coloring resistance, capability of improving the working quality of a product and wide application range in the field of materials special for polypropylene.

Description

technical field [0001] The invention relates to a nucleating agent, in particular to a beta crystal nucleating agent of polypropylene. Background technique [0002] Since the advent of polypropylene, it has been widely used in many fields, such as injection molding, film, and fiber production, with its excellent thermal and mechanical properties. This versatility and economy make polypropylene surpass polyvinyl chloride and polystyrene. It has become the second largest synthetic resin after polyethylene. Especially with the commercialization and application of various crystal forms of polypropylene, polypropylene has a very broad prospect in engineering plastics and functional materials. [0003] Polypropylene has a variety of crystal forms, namely α, β, γ, δ and pseudo-hexagonal crystal, and the crystal form is an important factor determining its mechanical, thermal and optical properties. Among them, the α crystal form is the most common, which is a thermodynamically sta...

AI Technical Summary

Problems solved by technology

[0010] CN101265342 discloses a composite β crystal nucleating agent for polypropylene, but it is composed of one or more β crystal nucleating agents and one or more synergists, and the composition is complex

[0011] CN101157771 discloses a loaded β-crystal nucleating agent and a preparation method thereof. The loaded β-crystal nucleating agent is composed of nano-calcium carbonate and aliphatic dicarboxylic acid, which is composed of multiple components, and the preparation method is complicated

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