裂解气相色谱质谱法研究增塑剂DOP热降解行为  

Study on Thermal Decomposition Behavior of Di(2-ethyl hexyl) phthalate by Py-GC/MS

作　　者：王强[1] 

机构地区：[1]新疆大学理化测试中心,新疆乌鲁木齐830046

出　　处：《新疆大学学报（自然科学版）》2010年第2期218-221,共4页Journal of Xinjiang University(Natural Science Edition)

摘　　要：用气相色谱质谱法(GC/MS)研究了增塑剂邻苯二甲酸二辛酯(DOP)在不同温度条件下的热裂解产物.对不同温度条件下裂解产物的分析表明,在初始阶段DOP的裂解产物主要为二氧化碳、苯、3-甲基庚烯、2-乙基己醇、邻苯二甲酸酐和苯甲酸(2-乙基)己酯.随着裂解温度的升高,3-甲基庚烯、2-乙基己醇、邻苯二甲酸酐和苯甲酸(2-乙基)己酯进一步裂解成为小分子自由基,并发生稠环化反应形成更稳定的菲、蒽、2-甲基菲、2-联萘等芳香族多环化合物.根据裂解产物信息和有机物热裂解化学反应的原理对DOP的热裂解反应机理作了探讨.在废旧橡胶和塑料热裂解回收过程中,增塑剂DOP的高温裂解时会产生多环芳烃污染物.应选择合适裂解工艺和裂解温度,以减少对环境的污染.Pyrolysis of Di（2-ethyl hexyl） phthalate （DOP） is conducted at different temperatures. The Pyrolysis products were analyzed by means of GC/MS. The results indicated that the main pyrolysis products of DOP were Carbon dioxide, Benzene, 3-methylene-Heptane, 2-ethyl-1-Hexanol, Phthalic anhydride, Benzoic acid 2-ethylhexyl ester. Then Benzoic acid 2-ethylhexyl ester were pyrolysised into smaller mass radicals with the temperature increasing. Polycyclic aromatic hydrocarbons such as Phenanthrene, Anthracene, 2- methyl-Phenanthrene . 2-Phenylnaphthalene were found with the temperature increasing. Pyrolysis reaction mechanism of DOP degradation was discussed according to the Pyrolysis products. The temperature and techonology of pyrolysis should be applied to decrease the environment pollution.

关 键 词：邻苯二甲酸二辛酯 热裂解 增塑剂 气相色谱质谱法 

分 类 号：O657.63[理学—分析化学] TQ32[理学—化学]