Thermal/oxidative degradation and stabilization of polyethylene glycol
Thermal/oxidative degradation and stabilization of polyethylene glycol
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DOI：
10.1016/s0032-3861(97)88175-x
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发表时间：
1997-01-01
期刊：
影响因子：
4.6
通讯作者：
Kwon, D
中科院分区：
文献类型：
--
作者：
Han, S;Kim, C;Kwon, D
为了开发聚乙二醇作为热能储存材料，研究了分子量为6000的聚乙二醇（PEG）的热降解和稳定性。低分子量的酯，包括甲酸酯，产生的主要产品的热降解的PEG在80 ° C的空气中。在真空中老化的PEG未观察到降解。其热降解机理为主链无规断链。添加2，2 '-亚甲基-双（4-甲基-6-叔丁基苯酚）（MBMTBP）作为抗氧剂可以抑制热降解。在稳定过程中，MBMTBP本身转化为二聚体或三聚体。版权所有（C）1996 Elsevier Science Ltd.
Thermal degradation and stabilization of polyethylene glycol (PEG) with a molecular weight of 6000 have been investigated in order to develop PEG as a thermal energy storage material. Low molecular weight esters including formic esters were produced as the main products of the thermal degradation of PEG at 80 degrees C in air. No degradation was observed for PEG aged in a vacuum. The mechanism of thermal degradation is found to be the random chain scission of the main chain. Thermal degradation could be suppressed by adding 2,2'-methylene-bis(4-methyl-6-tert-butylphenol) (MBMTBP) as an antioxidant. In the stabilizing process, MBMTBP itself is transformed to dimers or trimers. Copyright (C) 1996 Elsevier Science Ltd.