Shell powder filler having high beta-nucleation effect on polypropylene and preparation method for filler

Abstract

The invention discloses a shell powder filler having a high beta-nucleation effect on polypropylene and copolymer thereof and a preparation method for the filler. The method comprises the following steps of: dissolving aliphatic dicarboxylic acid in acetone, mixing a solution and shell powder, volatilizing the acetone, and thus obtaining the shell powder filler having the high beta-nucleation effect, wherein a mass ratio of the aliphatic dicarboxylic acid to the shell powder is 1:(5-1,000); and mixing the polypropylene or copolymer thereof and the shell powder filler having the high beta-nucleation effect in a mass ratio of 1:99-5:1, and performing melt extrusion or mixing and pelletizing at the temperature of between 200 and 230 DEG C to obtain shell powder filled polypropylene or copolymer thereof with high beta-crystal content. The shell powder filler having the high beta-nucleation effect is easy to prepare, small in equipment investment, low in energy consumption and cost, wide in raw material source and high in beta-nucleation efficiency, and has the characteristic of reinforcing and toughening the polypropylene or copolymer thereof.

Description

technical field [0001] The invention relates to the technical field of preparation of fillers for polymer materials, in particular to a shell powder filler with high beta nucleation effect on polypropylene and its copolymers and a preparation method thereof. Background technique [0002] The rapid development of shellfish farming has produced a large amount of shell waste. Shellfish farming in my country began in the early 1970s, mainly seawater shellfish farming. According to statistics, in the early 1960s, the annual output of marine cultured shellfish was about 300,000 tons, and in the early 1990s, the annual output increased to 1 million tons. Subsequently, the industry has developed greatly. By 2010, the total output of mariculture shellfish has reached 11.08 million tons. The main cultured species are oysters, clams, scallops and mussels. The yields are about 364, 354, 141, and 700,000 tons respectively, accounting for about 83.84% of the annual output of marine cultu...

AI Technical Summary

Problems solved by technology

However, many fillers mainly play the role of α-crystal nucleation in the crystallization of polypropylene and its copolymers, and it is difficult to obtain polypropylene with high β-crystal content; even if β-crystal nucleation is added to these filler-filled polypropylene and its copolymers The β-nucleation efficiency of the agent is reduced, and there is no β-nucleation effect in polypropylene even with the addition of high-cost β-crystal nucleating agents

Second, fillers with α-nucleation usually lead to a decrease in the impact properties of polypropylene and its copolymers

Although shell powder-filled polypropylene has been reported at home and abroad, there have been no reports of shell powder fillers with high β-nucleation and high β-crystal content filled polypropylene and its copolymers.

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