Synthetic method of perfluoroether rubber with wide temperature range and the perfluoroether rubber
A technology of perfluoroether rubber and synthesis method, which is applied in the field of polymer material synthesis, can solve problems such as inability to meet low temperature resistance requirements, and achieve the effects of widening the temperature range, reducing the glass transition temperature, and improving the high temperature resistance performance.
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Embodiment 1
[0036] This embodiment relates to a synthetic method of wide temperature range perfluoroether rubber, wherein the mass ratio of comonomer tetrafluoroethylene (TFE) and perfluoromethoxyethyl vinyl ether (a) is 10:90, including Follow the steps below:
[0037] In a 5L stainless steel reaction kettle with a stirrer, add 3L of deionized water, 2g of dipotassium hydrogen phosphate, and 2g of emulsifier perfluoropolyether carboxylate. Add 900g of perfluoromethoxyethyl vinyl ether (a) into the kettle, add part of TFE and then raise the temperature to 70°C, continue to add TFE monomer to increase the pressure to 1.0MPa, and press in 10g of perfluorobromoethyl through a metering pump Vinyl ether, 15% (wt) ammonium persulfate aqueous solution of 10g, 5g of I(CF 2 CF 2 ) 2 1 Polymerization starts, when reactor pressure drops every 0.01MPa, replenishes TFE monomer in reactor, maintains reactor inner pressure to be 1.0MPa.
[0038]The reaction was stopped when TFE continued to feed 100...
Embodiment 2
[0047] This embodiment relates to a synthetic method of wide temperature range perfluoroether rubber, wherein the mass ratio of comonomer tetrafluoroethylene (TFE) and perfluoromethoxyethyl vinyl ether (a) is 45:55, including Follow the steps below:
[0048] In a 5L stainless steel reaction kettle with a stirrer, add 3L of deionized water, 2g of dipotassium hydrogen phosphate, and 2g of emulsifier perfluoropolyether carboxylate. Add 550g of perfluoromethoxyethyl vinyl ether (a) into the kettle, add part of TFE and then raise the temperature to 70°C, continue to add TFE monomer to increase the pressure to 1.0MPa, and press in 10g of perfluorobromoethyl through a metering pump Vinyl ether, 15% (wt) ammonium persulfate aqueous solution of 10g, 5g of I(CF 2 CF 2 ) 2 1 Polymerization starts, when reactor pressure drops every 0.01MPa, replenishes TFE monomer in reactor, maintains reactor inner pressure to be 1.0MPa.
[0049] The reaction was stopped when TFE continued to feed 45...
Embodiment 3
[0054] This embodiment relates to a synthetic method of wide temperature range perfluoroether rubber, wherein the mass ratio of comonomer tetrafluoroethylene (TFE) and perfluoromethoxyethyl vinyl ether (a) is 45:55, including Follow the steps below:
[0055] In a 5L stainless steel reaction kettle with a stirrer, add 3L of deionized water, 2g of dipotassium hydrogen phosphate, and 2g of emulsifier perfluoropolyether carboxylate. Add 550g of perfluoromethoxyethyl vinyl ether into the kettle, add part of TFE and then raise the temperature to 70°C, continue to add TFE monomer to increase the pressure to 0.5MPa, and press in 4g of perfluorobromoethyl vinyl ether through a metering pump , 15% (wt) ammonium persulfate aqueous solution of 10g, the I(CF of 5g 2 CF 2 ) 2 1 Polymerization starts, when reactor pressure drops every 0.01MPa, replenishes TFE monomer in reactor, maintains reactor inner pressure to be 0.5MPa.
[0056] The reaction was stopped when TFE continued to feed 45...
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