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A kind of alpha olefin-fluorostyrene polymer and its preparation method

A technology of fluorostyrene and trifluorostyrene, which is applied in the field of α-olefin-fluorostyrene polymer and its preparation, can solve the problems of poor material performance, catalyst deactivation, and low polymerization activity, and achieve high content and high preparation The method has the advantages of simple process and good biocompatibility

Active Publication Date: 2021-01-08
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, fluorine can be introduced into polyolefin by free radical polymerization, metathesis polymerization and other methods, but the performance of the material prepared by this method is not good, and the cost of monomer synthesis is high
Fluorinating polyolefin is a relatively direct method, but this method is only effective for surface fluorination of materials
Moreover, the copolymerization of olefins and fluorinated olefins to produce fluorinated polyolefins is extremely difficult because fluorinated monomers not only have low polymerization activity but also often lead to catalyst deactivation

Method used

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  • A kind of alpha olefin-fluorostyrene polymer and its preparation method
  • A kind of alpha olefin-fluorostyrene polymer and its preparation method
  • A kind of alpha olefin-fluorostyrene polymer and its preparation method

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Experimental program
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Effect test

Embodiment 1

[0061] Add 30 mL of toluene and 2 mL of p-fluorostyrene into a 100 L polymerization bottle fully purged with nitrogen, and fill it with 1.0 atm ethylene under vigorous stirring to make it saturated in the toluene solution. In the glove box, the rare earth complex (5.6mg, 10mol) of formula 1, Al i Bu 3 (2.0mg, 1.0mol) and triphenylcarbonate tetrakis(pentafluorophenyl)borate [Ph 3 C][B(C 6 f 5 ) 4 ] (9.2 mg, 10 μmol) was dissolved in 5 mL of toluene to prepare a catalyst solution.

[0062] The catalyst solution was taken out from the glove box and quickly added to the polymerization reaction system at 40° C. to initiate polymerization. After 15 minutes, 20 mL of methanolic hydrochloric acid solution was added immediately to terminate the reaction. Then, a large amount of ethanol was added to isolate the copolymer, and the copolymer was vacuum-dried at 40° C. until the weight of the copolymer did not change to obtain an α-olefin-fluorostyrene polymer.

Embodiment 2～21

[0064] According to the method of Example 1, the α-olefin-fluorostyrene polymer was prepared using the reaction conditions in Table 1. Table 1 shows the reaction conditions for the preparation of α-olefin-fluorostyrene polymers in the embodiment of the present invention and the performance test results of the prepared α-olefin-fluorostyrene polymers.

Embodiment 22

[0066] The alpha olefin-fluorostyrene polymer that the embodiment of the present invention prepares is in C 2 D. 2 Cl 4 Proton nuclear magnetic resonance spectrum detection was carried out at medium and 25°C, and the molar content of fluorostyrene structural units in the polymer was calculated according to the following formula according to the detection results:

[0067] f S = 4A ar ÷(4A al +A ar )×100%

[0068] Among them, f s is the molar content of fluorostyrene in the polymer,

[0069] A ar is the integrated area of ​​the benzene ring hydrogen in the polymer NMR spectrum,

[0070] A al is the integrated area of ​​aliphatic hydrogen in the polymer NMR spectrum.

[0071] The alpha olefin-fluorostyrene polymer that the embodiment of the present invention prepares is passed differential scanning calorimetry (DSC), according to GB / T 29611-2013 " the measurement differential scanning calorimetry (DSC) of raw rubber glass transition temperature )" standard to detect ...

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Abstract

The invention provides an α-olefin-fluorostyrene polymer, the content of fluorostyrene structural units in the α-olefin-fluorostyrene polymer is greater than 30 mol%, and the vitrification of the α-olefin-fluorostyrene polymer is The transition temperature is 0-110°C, and the average length (MSL) of continuous fluorostyrene sequences in the α-olefin-fluorostyrene polymer is not less than one fluorostyrene structural unit. The present invention also provides a preparation method for the above-mentioned α-olefin-fluorostyrene polymer. Compared with the prior art, the present invention uses a specific catalyst to catalyze the polymerization of α-olefin and fluorostyrene, and the content of fluorostyrene structural units in the polymer prepared by this method is relatively high, and the preparation method provided by the present invention The process is simple, and the prepared polymer has good biocompatibility.

Description

technical field [0001] The invention relates to the technical field of polymers, in particular to an alpha olefin-fluorostyrene polymer and a preparation method thereof. Background technique [0002] Polyolefins are widely used due to their advantages of non-toxicity, chemical resistance, and excellent mechanical properties, especially in the field of preparing medical devices, which have attracted widespread attention. However, the poor compatibility of polyolefin to blood limits its application to some extent. It is of great significance to improve its compatibility with blood without affecting its mechanical properties. Theoretically, the introduction of fluorine into polyolefin can not only improve the cytotoxicity and hemocompatibility of polyolefin, but also improve its chemical stability and air tightness. Although fluorine elements can be introduced into polyolefins by free radical polymerization, metathesis polymerization and other methods in the prior art, the pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F210/02C08F212/14C08F210/08C08F210/14C08F210/06C08F4/52
CPCC08F210/02C08F210/06C08F210/08C08F210/14C08F212/14C08F4/52
Inventor 崔冬梅刘波
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI