Sulfonated EPDM ionomers ( S - EPDM ) were prepared with concentrated sulfuric acid and acetic anhydride.

用浓硫酸和醋酸酐与三元乙丙橡胶(EPDM ) 反应制备了磺化三元乙丙橡胶离聚物 ( S-EPDM).

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Must not add water, well water and concentrated sulfuric acid.

切忌加注河水 、 井水和浓硫酸.

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Chlorotrimethylsilane was prepared , with trimethylsilyl ether and hydrochloride as raw materials, concentrated sulfuric acid as catalyst.

以三甲基硅醚和氯化氢气体为原料, 浓硫酸为催化剂合成了三甲基氯硅烷.

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