Kinetics of the dehydrochlorination of poly(vinyl chloride) in the presence of NaOH and various diols as solvents
Kinetics of the dehydrochlorination of poly(vinyl chloride) in the presence of NaOH and various diols as solvents
复制标题
NaOH 和各种二醇作为溶剂时聚氯乙烯脱氯化氢的动力学
DOI：
10.1016/j.polymdegradstab.2009.05.006
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发表时间：
2009
影响因子：
5.9
通讯作者：
T. Yoshioka
中科院分区：
文献类型：
--
作者：
T. Kameda;Katsuaki Imai;G. Grause;T. Mizoguchi;T. Yoshioka
研究了PVC在NaOH存在下，在不同二元醇中的脱氯化氢反应。发现二甘醇（DEG）、三甘醇（TEG）和丙二醇（PG）在加速PVC脱氯方面是有效的。脱氯化氢反应的顺序为TEG > DEG > PG，这与PET与二元醇的相容性相一致。相容性导致溶剂对PVC颗粒的渗透得到改善，从而加速脱氯化氢。PVC在NaOH/二元醇体系中的脱氯化氢反应符合一级动力学，证实了反应过程是在化学反应控制下进行的。TEG、DEG和PG的表观活化能分别为82 kJ mol−1、109 kJ mol−1和151 kJ mol− 1。活化能越低，PVC脱氯化氢反应进行得越快。
The dehydrochlorination of PVC in the presence of NaOH was investigated in different diols. Diethylene glycol (DEG), triethylene glycol (TEG), and propylene glycol (PG) were found to be effective in accelerating the dechlorination of PVC. The dehydrochlorination was promoted in the order TEG > DEG > PG, which was in agreement with the compatibility between PET and the diol. Compatibility resulted in an improved penetration of the PVC particle by the solvent, leading to the acceleration of the dehydrochlorination. The dehydrochlorination of PVC in NaOH/diol followed first-order kinetics, confirming the progress of the reaction under chemical reaction control. The apparent activation energies were 82 kJ mol−1, 109 kJ mol−1, and 151 kJ mol−1for TEG, DEG, and PG, respectively. The lower the activation energy became the faster the dehydrochlorination of PVC proceeded.