Methacrylate polyphenylene ether and its preparation method and application
A technology of methacrylate and polyphenylene ether, which is applied in the direction of chemical instruments and methods, coatings, layered products, etc., can solve the problems of small molecular weight distribution and insufficient heat resistance, and achieve small molecular weight polymerization and good toughness , good distribution effect
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Embodiment 1
[0066] A methacrylate polyphenylene ether is prepared by the following method:
[0067] In a 500 mL three-necked round-bottomed flask, 100 g of R is cyclohexyl polyphenylene ether and 300 g of toluene were sequentially added, and stirred at room temperature (about 20° C.) for about 30 minutes. After the polyphenylene ether was dissolved, 17.33 g of methacryloyl chloride was pre-dissolved in 52 g of toluene, stirred evenly (molar ratio was 8:1), added to the above-mentioned flask, and the reaction was continued for 30 min. Next, 25.18 g of triethylamine (the molar ratio of triethylamine to methacryloyl chloride is 1.5:1) was pre-dissolved in 75.5 g of toluene, stirred well, and then added to the above flask in batches. The reaction was completed by heating to 50°C and stirring for 5 hours. Add hydrochloric acid for neutralization, add methanol for extraction, retain the toluene layer, add methanol to precipitate a solid, filter, and vacuum dry the solid to obtain 90 g of light...
Embodiment 2
[0080] A methacrylate polyphenylene ether, the difference from Example 1 is that 9.2g of cyclohexanone is replaced by 7.8g of cyclopentanone, correspondingly R is cyclopentyl, and finally 84g of light gray powder is obtained, m+n =20~23, number average molecular weight Mn=2800~3100.
[0081] The structure of this methacrylate polyphenylene ether is as follows formula VII:
[0082]
[0083] The structure of the polyphenylene ether intermediate involved in the preparation process is shown in formula VIII:
[0084]
[0085] The structure of the polyphenylene ether involved in the preparation process is shown in formula IX:
[0086]
[0087] The results of hydrogen spectrum, carbon spectrum and infrared spectrum of the polyphenylene ether intermediate shown in formula VIII are as follows Figure 6-8 shown; after testing, the compound has a melting point of 176.4°C. The infrared spectrum of polyphenylene ether shown in formula IX is as follows Figure 9 shown. The inf...
Embodiment 3
[0089] A methacrylate polyphenylene ether, the difference from Example 1 is that 9.2g of cyclohexanone is replaced by 8.8g of methyl ethyl ketone, correspondingly R is methyl ethyl, and finally 88g of light gray powder is obtained, m +n=20~23, number average molecular weight Mn=2700~3100.
[0090] The structure of the methacrylate polyphenylene ether is as follows:
[0091]
[0092] The structure of the polyphenylene ether intermediate involved in the preparation process is shown in formula XI:
[0093]
[0094] The structure of the polyphenylene ether involved in the preparation process is shown in formula XII:
[0095]
[0096] After testing, polyphenylene ether and methacrylate polyphenylene ether have good solubility for benzene, ketone, amide, pyridine, etc.
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