Flexible poly(vinyl chloride) (PVC) was found to be dechlorinated in NaOH/ethylene glycol (EG) solution at moderate temperature and at atmospheric pressure. The degree of dechlorination increased over time with all particle sizes and with decreasing particle size. Decreased particle size resulted in an increased effective surface area, increasing the contact between the material and OH⁻ in the NaOH/EG solution, which contributed to the high degree of dechlorination. The dechlorination of flexible PVC in NaOH/EG solution was expressed as a first-order reaction and proceeded under chemical reaction control. Diisononyl-phthalate (DINP) in the flexible PVC powder decomposed readily into phthalic acid and isononyl alcohol in a short time. For the dechlorination of the flexible PVC, the substitution (S_N2) of chloride by the hydroxyl group was considered to be preferential to the elimination (E2) of hydrogen chloride.

中文翻译：

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柔性聚氯乙烯在NaOH / EG溶液中的脱氯行为

发现柔性聚氯乙烯（PVC）在NaOH /乙二醇（EG）溶液中在中等温度和大气压下脱氯。脱氯度随着时间的推移随着所有粒径的增加而增加，并且随着粒径的减小而增加。粒径减小导致增加有效表面积，增加了材料之间的接触和OH ^-中的氢氧化钠/ EG溶液，这促成了高度脱氯。柔性PVC在NaOH / EG溶液中的脱氯反应是一级反应，并在化学反应控制下进行。柔性PVC粉末中的邻苯二甲酸二异壬酯（DINP）在短时间内容易分解为邻苯二甲酸和异壬醇。对于柔性PVC的脱氯，取代（S _N2）通过羟基的氯化物被认为优先于氯化氢的消除（E2）。