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Beta-cyclodextrin derivative complex nucleating agent and application thereof in polypropylene

A technology of derivatives and cyclodextrin, which is applied in the field of high-performance polymer materials, can solve the problems of poor modification performance and high cost, and achieve the effects of improving impact strength, easy access to raw materials, and convenient use

Inactive Publication Date: 2010-09-08
FUZHOU UNIV
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AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a β-cyclodextrin derivative complex nucleating agent to solve the problems of poor modification performance and high cost of polypropylene β-nucleating agents in the prior art

Method used

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  • Beta-cyclodextrin derivative complex nucleating agent and application thereof in polypropylene
  • Beta-cyclodextrin derivative complex nucleating agent and application thereof in polypropylene
  • Beta-cyclodextrin derivative complex nucleating agent and application thereof in polypropylene

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preparation example Construction

[0014] The specific steps of the preparation method of the β-cyclodextrin-maleic anhydride derivative complex nucleating agent are as follows:

[0015] (1) Synthesis of β-cyclodextrin-maleic anhydride derivatives: Dissolve β-cyclodextrin and maleic anhydride with a molar mass ratio of 1:6~1:12 in a solvent N'N- In dimethylformamide DMF, react at 60~80°C for 8~10h; after the reaction, cool down to room temperature, add chloroform with the same volume as DMF to precipitate out; the volume ratio for precipitation is 100:2~100 : 5 mixed solvents of acetone and water were washed several times, vacuum-dried after suction filtration, and obtained β-cyclodextrin-maleic anhydride derivatives;

[0016] (2) Synthesis of β-cyclodextrin-maleic anhydride derivative complex nucleating agent: dissolve lanthanum oxide in hydrochloric acid with a molar mass ratio of 5 to 7 times to form a lanthanum trichloride solution, filter and store in an evaporating dish Heat and condense into lanthanum t...

Embodiment 1

[0020] Dissolve 0.01mol β-cyclodextrin and 0.1mol maleic anhydride in 50ml of N'N-dimethylformamide DMF and react at 70°C for 9~10h; , so that the precipitate is separated out; the precipitate is washed several times with a mixed solvent of acetone and water with a volume ratio of 100:3 to 100:4, vacuum-dried after suction filtration to obtain a β-cyclodextrin-maleic anhydride derivative;

[0021] Dissolve 1 mol of lanthanum oxide in 6 mol of hydrochloric acid to form lanthanum trichloride solution, filter and heat and concentrate in an evaporating dish to form lanthanum trichloride powder; dissolve 0.01 mol of β-cyclodextrin-maleic anhydride derivative in 100 ml of water, add 0.12mol of lanthanum trichloride powder, stirred and reacted for 1~2h to dissolve it completely; added 0.36mol of triethylamine, reacted for 12~13h to obtain a light yellow precipitate; the precipitate was washed several times with water and ethanol after suction filtration, and vacuum dried Obtain β-cyc...

Embodiment 2

[0024] 1Kg polypropylene and 0.2~0.5wt% β-CD-MAH-La are uniformly mixed in a high-speed mixer, extruded and granulated in a twin-screw extruder at 175~220°C, and injected at 170~210°C into The standard spline is denoted as PP1.

[0025] Test impact performance according to GB / T1043-93 standard, test heat distortion temperature according to GB / T1634-2004 standard, measure tensile properties according to GB / T1040.2-2006 and measure bending properties according to GB / T9341-2008, the test results are shown in the table 1. The samples were scanned with WAXD. In the WAXD spectrum, the main diffraction peaks of the α-PP crystal form are at 2θ of 14.1° (110), 16.9° (040), and 18.5° (130), corresponding to (110), (040), ( 130) crystal plane, and the typical β-PP crystal form is the (300) crystal plane diffraction peak at 16.1°.

[0026] The blank PP is also made into a standard spline according to the above process, which is recorded as PP0 for testing, so as to facilitate compariso...

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Abstract

The invention provides a beta-cyclodextrin derivative complex nucleating agent and application thereof in polypropylene, which belong to the technical field of material high performance and solve the problems of poor modification performance, high cost and the like of a polypropylene beta nucleating agent in the prior art. The beta-cyclodextrin derivative complex nucleating agent is a complex of a beta-cyclodextrin derivative and lanthanum ions, is used for improving the beta-form content and the anti-impact capability of the polypropylene, has simple synthetic process and easy obtainment of raw materials, can induce the polypropylene to generate a higher content of beta-forms and can improve the anti-impact strength of the polypropylene.

Description

technical field [0001] The invention belongs to the technical field of high-performance polymer materials, and specifically relates to a nucleating agent of a beta-cyclodextrin derivative complex and its application in polypropylene. Background technique [0002] As a general-purpose thermoplastic with low price and good comprehensive performance, polypropylene (PP) is widely used in many industries such as daily necessities and automobiles. PP is a semi-crystalline polymer, and its crystallinity, crystal form and crystal structure play a key role in its performance. The crystal structure of isotactic polypropylene (PP) can be divided into five types: α, β, γ, δ and pseudo-hexagonal. Among them, the α crystal form is basically produced under general processing conditions. The α crystal form is a monoclinic crystal system, which is the most stable crystal form in PP, but has disadvantages such as poor impact resistance. The β crystal form is a hexagonal crystal system, ...

Claims

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Application Information

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IPC IPC(8): C08B37/16C08L23/12C08L5/16
Inventor 郑玉婴
Owner FUZHOU UNIV
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