Polymer particle, conductive particle, anisotropic conductive material and connection structure
A technology of conductive particles and polymers, applied in the treatment of dyed polymer organic compounds, printed circuits, electrical components, etc., can solve problems such as the deformation of conductive particles, reduce the compressive elastic modulus, improve the compression deformation recovery rate, The effect of reducing the volume expansion coefficient
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Embodiment 1
[0197] 55 parts by weight of lauryl acrylate (LA), 45 parts by weight of pentaerythritol tetraacrylate (PTA), and Parts by weight and 3.1 parts by weight of PERBUTYL O (manufactured by NOF Corporation) as a polymerization initiator (the size of the droplets was adjusted to 240 μm) to obtain a mixed solution.
[0198] In a nitrogen atmosphere, polymerization of the obtained mixed solution was performed at 70° C. for 5 hours. Then, the particles were collected by performing suction filtration. The particles were washed with ion-exchanged water and acetone to completely remove the dispersion solvent, and then dried to obtain polymer particles.
Embodiment 2~7 and comparative example 1
[0200] Except having used lauryl acrylate (LA) and pentaerythritol tetraacrylate (PTA) in the ratio shown in following Table 1, it carried out similarly to Example 1, and obtained the polymer particle.
Embodiment 8
[0204] Mix 65 parts by weight of lauryl acrylate (LA), 35 parts by weight of pentaerythritol tetraacrylate (PTA), and 3.1 parts by weight of PERBUTYL O (manufactured by NOF Corporation), and carry out suspension polymerization in a 1% by weight aqueous solution of polyvinyl alcohol, and then implement By classifying, polymer particles were obtained.
[0205] (Evaluation of Examples 1 to 8 and Comparative Examples 1 and 2)
[0206] (1) Compression modulus of polymer particles (10% K value)
[0207] The compressive elastic modulus (10%K value) of the obtained polymer particle was measured by the method mentioned above using the microcompression tester (PCT-100 by Shimadzu Corporation).
[0208] (2) Compression deformation recovery rate of polymer particles
[0209] The compression set recovery rate of the obtained polymer particles was measured by the method described above using a micro compression tester (PCT-100 manufactured by Shimadzu Corporation).
[0210] (3) Volume ex...
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