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Nitrogenous polymer containing long-chain allyl ester and maleic anhydride monomer and its preparation

A maleic anhydride and polymer technology, applied in the field of nitrogen-containing polymers, can solve problems such as poor compatibility, complex process routes, and high raw material prices, achieve good compatibility, simple preparation methods, and facilitate industrial production Effect

Inactive Publication Date: 2008-07-09
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Although fiber manufacturers and research institutes around the world have conducted a lot of research on acid dye-dyeable polypropylene fibers, acid dye-dyeable polypropylene fibers are still not widely used in the textile industry. The main reason is that the process route is complicated. , poor compatibility and high raw material prices, etc., so further research and development of polypropylene fibers dyeable with acid dyes will have great social and economic significance

Method used

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  • Nitrogenous polymer containing long-chain allyl ester and maleic anhydride monomer and its preparation
  • Nitrogenous polymer containing long-chain allyl ester and maleic anhydride monomer and its preparation
  • Nitrogenous polymer containing long-chain allyl ester and maleic anhydride monomer and its preparation

Examples

Experimental program
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Effect test

Embodiment 1

[0037] Take 70 grams of maleic anhydride, 30 grams of tetradecyl methacrylate, and 0.1 gram of azobisisobutyronitrile, put them in a reactor, and under the protection of nitrogen, stir and heat up to 60° C., and react for 4 hours to obtain Copolymer, its infrared spectrum is shown in figure 1 .

[0038] figure 1 The infrared spectrum of the copolymerization product is at 1782.8cm -1 and 1854.4cm -1 A strong characteristic peak appears at , which should be attributed to the symmetric and asymmetric stretching vibration peaks of the carbonyl (C=O) of the acid anhydride respectively, and it is at the low frequency of 1782.8cm -1 The spectral band is higher than the high frequency 1854.4cm -1 The band is strong, which is consistent with the carbonyl characteristics of five-membered cyclic anhydrides, indicating that there are cyclic anhydrides in the copolymerization product. The difference between the wave numbers of the two carbonyl characteristic peaks of the acid anhydrid...

Embodiment 2

[0042] Using the same method as in Example 1, replacing aniline with 4.5 grams of 3-dimethylamino-1-propylamine, the number-average molecular weight of this nitrogen-containing copolymer is 52,000, and its thermal decomposition temperature is 358° C. -1 For the characteristic peaks of the carbonyl characteristic peaks of cyclic imines, see image 3 .

Embodiment 3

[0044] Take 60 grams of maleic anhydride, 40 grams of carbon dodecyl methacrylate, and 0.12 grams of azobisisobutyronitrile, place them in a reactor, and under nitrogen protection, stir and heat up to 80° C., and react for 3 hours to obtain copolymer;

[0045] 50 grams of the above-mentioned copolymer, 3 grams of 3-dimethylamino-1-propylamine, and 3 grams of n-octadecylamine were dissolved in 250 ml of N, N dimethylformamide, and reacted for 3 hours at a temperature of 80 ° C. Imination and dehydration can obtain the nitrogen-containing copolymer of the present invention.

[0046] The number-average molecular weight of the nitrogen-containing copolymer is 55,000, the thermal decomposition temperature is 358°C, and there is a 1715cm -1 For the characteristic peaks of the carbonyl characteristic peaks of cyclic imines, see Figure 4 .

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Abstract

The nitrogenous polymer preparing process includes the following steps: copolymeriaztion of maleic anhydride monomer and vinyl group containing monomer to obtain copolymer; and amination or imidation of the copolymer in solvent of organic amine to obtain the nitrogenous copolymer. The polymer of the present invention may be used as functional modifying assistant, which is blended with polypropylene and spin to improve the acid dyeability of polypropylene fiber. The polymer of the present invention has higher polar group content and high polypropylene compatibility, so that it may be blended simply with polypropylene.

Description

technical field [0001] The invention relates to a nitrogen-containing polymer containing allyl long-chain ester and maleic anhydride monomer and a preparation method thereof, in particular to a polymer for improving the dyeability of polypropylene fibers. Background technique [0002] The acid-dyeable modification of polypropylene fiber is a difficult problem that has not been completely solved so far. For this reason, many scientific and technical personnel have done a lot of research work. Among the various methods to improve the dyeing properties of polypropylene fibers, the blending method is the most feasible method for industrial application, and it is also the direction of related research. The choice of which copolymer to blend with polypropylene determines which type of dye the blended modified fiber can be dyed and the properties of the fiber. It can also be used as a compatibilizer to make polypropylene polymerize with another more polar polymer. material blendin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F222/22
Inventor 董擎之施英德徐志瑜
Owner EAST CHINA UNIV OF SCI & TECH
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