Electroconductive member, process cartridge, and electrophotographic device
An electro-conductive member and electrophotographic technology, which can be applied to equipment, electrical components, thin material processing, etc. using the electrical recording process of charge patterns, can solve the problems of increasing the resistance of the elastic layer and reducing the number of carriers, and achieve the suppression of resistance. effect of change
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Embodiment 1
[0115] 100 g of Polymer No. 1 was dissolved in 4.0 L of dichloromethane, and the temperature of the solution was maintained at 40° C. in an argon atmosphere. 27.52 g of concentrated sulfuric acid was added dropwise to the dichloromethane solution. After the dropwise addition was completed, the temperature of the resulting liquid was increased to 80°C, and then the liquid was reacted by stirring for 72 hours while maintaining the liquid temperature at 80°C. Next, 1.0 L of methanol was dropped into the reaction solution to stop the reaction. The resulting reaction product was washed by repeating dissolution in toluene and reprecipitation with methanol three times. After that, the reaction product was dried in air at a temperature of 80° C. for 24 hours. Next, the dried reaction product was dissolved in 1.0 L of toluene, and then the solution was subjected to dry distillation at a temperature of 120° C. while stirring in a nitrogen atmosphere. During dry distillation, 500 g of...
Embodiment 2) to ( Embodiment 17
[0142] In addition to changing the polymer No. 1 in Example 1 to a polymer having a number as shown in Table 5-1, and changing the mixing amount to the amount shown in Table 5-1, in the same manner as in Example 1 Synthesize thermoplastic elastomers 2 to 17 in the same manner as in 1. The introduction ratio of the sulfonic acid group to the double bond of the diene block of each of the obtained thermoplastic elastomers Nos. 2 to 17 was measured by proton NMR in the same manner as in Example 1.
[0143] In addition, the state of the microphase separation structure of thermoplastic elastomer Nos. 2 to 17 was observed in the same manner as in Example 1. Table 5-2 shows the composition of each of thermoplastic elastomers Nos. 2 to 17 which are A-B-A type copolymers in the present invention, the kind of microphase-separated structure composed of polystyrene blocks of each elastomer, and sulfonic acid The introduction ratio of the base to the double bond of the diene block of each ...
Embodiment 18
[0146] A sulfonic acid group was introduced into Polymer No. 1 in the same manner as in Example 1 except that the mixing amount of concentrated sulfuric acid in Example 1 was changed to 27.52 g. Next, 1.0 L of methanol was dropped into the reaction solution to stop the reaction. The resulting reaction products were washed by repeating dissolution in toluene and reprecipitation with methanol three times each. After washing, the reaction product was dried in air at 80 °C for 24 hours. Next, the dried reaction product was dissolved in 1 L of toluene, and then 200 g of glacial acetic acid was gradually added dropwise to the solution while stirring the solution in a nitrogen atmosphere. After the dropping was completed, the temperature of the resulting solution was raised, and then the solution was stirred for 72 hours while maintaining its temperature at 80°C. The resulting reaction products were washed by repeating dissolution in toluene and reprecipitation with methanol each f...
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Abstract
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