Effect of hydrogen transferred from solvent and gaseous hydrogen on thermal decomposition of dehydrochlorinated poly(vinyl chloride)
Effect of hydrogen transferred from solvent and gaseous hydrogen on thermal decomposition of dehydrochlorinated poly(vinyl chloride)
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溶剂转移氢和气态氢对脱氯化氢聚氯乙烯热分解的影响
DOI：
10.1016/j.polymdegradstab.2004.07.010
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发表时间：
2005
期刊：
影响因子：
--
通讯作者：
Y. Kodera
中科院分区：
文献类型：
--
作者：
T. Kamo;Y. Kodera
将300℃脱氯化氢的聚氯乙烯(PVC)在7.1MPa初始压力的氮气或氢气或镍钼催化剂存在下的四氢萘中于440℃或470℃下分解60min。在两种温度下，主要产物为不溶于四氢呋喃的馏分、不溶于己烷的未蒸馏馏分、溶于己烷的未蒸馏馏分和液体产物。在440℃氮气下，液体产物的收率为7.1%，但在470℃催化剂存在下，在氢气下收率增加至43.2%。在由脱氯化氢PVC衍生的产物的收率与从四氢化萘和气态氢转移的氢总量之间观察到线性关系。从溶剂和气态氢转移的氢气促进了脱氯化氢PVC的降解并减少了降解产物中残留氯的量。
Poly(vinyl chloride) (PVC) dehydrochlorinated at 300°C was decomposed in tetralin at 440°C or 470°C for 60min under 7.1MPa initial pressure of nitrogen or hydrogen or of hydrogen in the presence of a nickel–molybdenum catalyst. A tetrahydrofuran-insoluble fraction, a hexane-insoluble undistilled fraction, a hexane-soluble undistilled fraction, and a liquid product were the main products at both temperatures. At 440°C under nitrogen, the yield of liquid product was 7.1%, but the yield increased to 43.2% under hydrogen in the presence of the catalyst at 470°C. Linear relationships were observed between the yields of the products derived from the dehydrochlorinated PVC and the total amounts of hydrogen transferred from tetralin and gaseous hydrogen. Hydrogen transferred from the solvent and from gaseous hydrogen promoted the degradation of dehydrochlorinated PVC and reduced the amount of residual chlorine in the degradation products.