Polyvinylidene fluoride-based terpolymer and preparation method thereof
A technology of polyvinylidene fluoride and terpolymer, applied in the field of lithium ion polymer and its preparation, based on polyvinylidene fluoride terpolymer and its preparation, to increase adsorption capacity, reduce polarization, improve chemical The effect of stability
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Embodiment 1
[0083] This embodiment provides a terpolymer based on polyvinylidene fluoride.
[0084] A kind of terpolymer based on polyvinylidene fluoride provided in this embodiment is to comprise:
[0085] Polyvinylidene fluoride structural unit (A) composed of x molar parts of vinylidene fluoride monomer, acrylamide structural unit (B) composed of y molar parts of acrylamide monomer and z molar parts of lithium perfluorovinyl ether sulfonate Perfluorovinyl ether sulfonate lithium structural unit (C) composed of monomers is a copolymer composed of three compound structural units; and
[0086] The copolymer has the following general structural formula:
[0087]
[0088] in:
[0089] In the acrylamide structural unit, it:
[0090] R is -H, -CH 3 、-CH(CH 3 ) 2 、-CH 2 CH 3 ,-(CH 2 ) 3 -OCH 3 、-CH 2 -OH, -(CH 2 ) 11 -CH 3 , -(CH 2 ) 3 -N(CH 3 ) 2 、-C(CH 3 ) 3 、-CH(CH 3 ) 2 、-CH 2 C 6 h 5 、-C 6 h 5 any of the
[0091] In the perfluorovinyl ether sulfonate lithiu...
Embodiment 2
[0107] This example provides a method for preparing a polyvinylidene fluoride-based terpolymer.
[0108] A kind of preparation method based on polyvinylidene fluoride terpolymer provided by the present embodiment comprises the following steps:
[0109] In the reaction device, add vinylidene fluoride monomer, acrylamide monomer and perfluoro Lithium vinyl ether sulfonate monomer and initiator are copolymerized by a polymerization reaction method to form the polyvinylidene fluoride-based terpolymer, and its reaction formula is:
[0110]
[0111] Further, in the above preparation method:
[0112] The reaction device is an autoclave;
[0113] In the step of adding vinylidene fluoride monomer, acrylamide monomer and perfluorovinyl ether sulfonate lithium monomer and initiator respectively, specifically include:
[0114] In the high-pressure reactor, first add acrylamide monomer, perfluorovinyl ether sulfonate lithium monomer and initiator, repeatedly evacuate to remove oxygen...
example 1
[0141] In a high-pressure reactor with a tolerance of 10MPa, add the structural formula CH 2 =CH-CONH 2 The acrylamide monomer, and the structural formula is Lithium perfluorovinyl ether sulfonate monomer and benzoyl peroxide initiator, repeatedly evacuated to remove oxygen, and then filled with structural formula CH under nitrogen atmosphere 2 = CF 2 Vinylidene fluoride gas;
[0142] in:
[0143] The structural formula is CH 2 = CF 2 The polyvinylidene fluoride structural unit composed of vinylidene fluoride gas has a structural formula of CH 2 =CH-CONH 2 The acrylamide structural unit composed of the acrylamide monomer, and the structural formula is F 2 C=CF-OCF 2 CF(CF 3 )-OCF 2 CF 2 -SO 3 Li + The mole fraction ratio of the three perfluorovinyl ether sulfonate lithium structural units formed by the perfluorovinyl ether sulfonate lithium monomer is:
[0144] Vinylidene fluoride structural unit: acrylamide structural unit: perfluorovinyl ether sulfonate lithi...
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