One kind of halogenic polyethyl ether and its preparation method
A technology of halomethylated polyarylether and halomethyl polyarylether, which is applied in the field of high molecular polymers and its preparation, can solve the problems of reducing membrane alkali resistance, polyarylether main chain breakage, and difficult-to-basic anion exchange Membrane fuel cells and other issues, to achieve the effect of novel synthesis methods and green steps
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[0052] The preparation method of the halomethyl polyarylether of the present invention is as follows: add the polymer precursor, the halomethylated compound, the catalyst and the solvent into the reactor, stir and react at 25-80°C for 1-72 hours, and then slowly dissolve the reaction solution Drop into ethanol, filter, soak the precipitate with 30v% ethanol and wash until the pH is close to neutral, collect the precipitate and dry to obtain halomethylated polyarylether;
[0053] The structure of the polymer precursor is shown in formula II:
[0054] Formula II
[0055] In formula II, Ar, M and n are the same as described in formula I above;
[0056] The structure of the halomethylated compound is shown in formula III:
[0057]
[0058] Formula III
[0059] In formula III, X is the same as that described in formula I above.
[0060] In the above preparation method, the preferred scheme of the molar ratio of the polymer precursor to the halomethylated compound is: the m...
Embodiment 1
[0070] Embodiment 1: Synthesis of chloromethylated polyphenylene ether
[0071] Add polyphenylene ether (containing a mmol of phenyl, commercially available), b mmol of 4-chloromethylbenzoic acid, c ml of solvent and d ml of Eaton's reagent into a round bottom flask equipped with a condenser tube and a drying tube , stirred and reacted at a certain temperature for several hours, then the reaction solution was slowly dropped into ethanol, filtered, the precipitate was soaked in 30v% ethanol and washed until the pH was close to neutral, and dried to obtain a series of polyphenylene ethers with different degrees of substitution.
[0072] The reaction formula of the present embodiment is as follows:
[0073]
[0074] In the formula, 0
[0075] The impact of the amount of substance, solvent type, temperature of reaction and time on the chloromethyl substitution degree of the polymer obtained by each adding component, i.e. x is listed in Tabl...
Embodiment 2
[0079] Example 2: Synthesis of chloromethylated polyetherketone BP1-x
[0080] Add polyetherketone P1 (containing a mmol of electron-rich phenyl), b mmol of 4-chloromethylbenzoic acid, c ml of solvent and d ml of Eaton's reagent into a round bottom flask equipped with a condenser tube and a drying tube , stirred and reacted at a certain temperature for several hours, then the reaction solution was slowly dropped into ethanol, filtered, the precipitate was soaked in 30v% ethanol and washed until the pH was close to neutral, and dried to obtain a series of chloromethyl groups with different degrees of substitution. Polyetherketone BP1-x.
[0081] The reaction formula of the present embodiment is as follows:
[0082]
[0083] In the formula, 0
[0084] The influence of the amount of each added component, solvent type, reaction temperature and time on the chloromethyl substitution degree of the obtained chloromethylated polyetherketone BP1...
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