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2 protocols using butanethiol

1

Surface Modification of Ag/Cu Powders

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The alkanethiols (butanethiol, octanethiol, and dodecanethiol) used to modify the surfaces of Ag/Cu powders were purchased from Sigma-Aldrich. Ag/Cu powder dispersed in isopropyl alcohol (IPA), without surface treatment after Ag coating, was supplied by JC Metal (Korea). The epoxy resin (YDPN 644, epoxy equivalent weight = 195–235 g/eq) and curing agent, phthalic anhydride (MNA), employed in the preparation of electrically conductive films were supplied by Kukdo Chemical (Korea). Toluene (99.5 %, Daejung Chemical, Korea) served as a diluent. All chemicals were used as received, without purification.
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2

Synthesis and Purification of RAFT Agents

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Styrene (Sigma Aldrich, 99%) was deinhibited over activated basic alumina prior to each polymerization. The RAFT agents TTC 2 (ABCR, 97%) and TTC 3 (ABCR, 97%) were used as received. The chemicals used as reactants, acryloyl chloride (ABCR, 96%, stabilized with phenothiazine), pyrrolidine (Acros, 99%), butanethiol (Sigma Aldrich, 99%), potassium hydroxide (Merck, 485%), carbon disulfide (Merck, 99%), p-tosyl chloride (Merck, 98%), and 4,4 0 -azobis(4-cyanopentanoic acid) (Sigma Aldrich, 98%) were used as received. All solvents for reactions, purifications, and NMR, dichloromethane (Acros, 99.9%), 1,4-dioxane (Gru ¨ssing, 99%), dimethylformamide (VWR, 99.5%), acetone (Merck, 99%), methyl acetate (Merck, 99%), n-hexane (VWR Chemicals, 95%), chloroform-d 1 (Euriso-Top, 99.8%), and tetrahydrofuran-d 8 (Euriso-Top, 99.5%) were used without further purification. All other chemicals, sodium chloride Gru ¨ssing (99%), KHSO 4 (Gru ¨ssing, 99%), NaHCO 3 (Gru ¨ssing, 99%), Mg 2 SO 4 (Gru ¨ssing, 99%), and activated basic aluminum oxide (Merck, 99%, grain size between 0.063-0.200 mm) were also used as received.
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