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Acid catalysts are very important in the production of many industrial chemicals. The novel polythiourethane‐based solid acid has been synthesized via two steps. The copolymerization of tolylenediisocyanate (TDI) and 1,2‐bis[(2‐mercaptoethyl)thio]‐3‐mercapto‐propane (MR) was carried out as the first step, and the amount of free mercarpto groups in the polythiourethane was controlled by adjusting the...
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