| 硬脂酸镧对PVC热稳定作用机理的研究 |
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| 引用本文： | 蒋金博,邓剑如,奚家国,周飞,蒋向.硬脂酸镧对PVC热稳定作用机理的研究[J].塑料工业,2006,34(6):54-56,60. |
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| 作者姓名： | 蒋金博 邓剑如 奚家国 周飞 蒋向 |
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| 作者单位： | 湖南大学化学化工学院,湖南,长沙,410082 |
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| 基金项目： | 湖南省杰出青年科学基金 |
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| 摘 要： | 采用紫外光谱和红外光谱分析方法，研究了硬脂酸镧对PVC的热稳定机理。结果表明：硬脂酸镧对PVC具有明显的热稳定作用；硬脂酸镧在PVC降解过程中对共轭双烯结构的形成，不能起到显著的抑制作用；硬脂酸镧能与PVC中的氯原子发生作用，使得C—Cl键趋于稳定，使得PVC在降解过程中1，3重排更为困难，因而明显抑制共轭多烯结构的形成；并根据PVC降解的协同消除机理，作出了很好的解释。
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| 关 键 词： | 硬脂酸镧 热稳定作用机理 紫外光谱 红外光谱 |
| 文章编号： | 1005-5770（2006）06-0054-03 |
| 收稿时间： | 2006-02-22 |
| 修稿时间： | 2006-02-22 |
Study on Thermal Stabilization Mechanism of PVC by Lanthanum Stearate |
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| JIANG Jin-bo,DENG Jian-ru,XI Jia-guo,ZHOU Fei,JIANG Xiang.Study on Thermal Stabilization Mechanism of PVC by Lanthanum Stearate[J].China Plastics Industry,2006,34(6):54-56,60. |
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| Authors: | JIANG Jin-bo DENG Jian-ru XI Jia-guo ZHOU Fei JIANG Xiang |
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| Affiliation: | College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, .China |
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| Abstract: | The mechanism of thermal stabilization of lanthanum stearate on PVC was studied by means of UV spectra and IR spectra. The results showed lanthanum stearate had obvious thermal stabilization effect on PVC, but could not restrain the increase of conjugated double bond effectively during the degradation of PVC; however, it could interact with the chlorine in PVC to make C-Cl bond to be stabilized and 1, 3 rearrangement of chlorine more difficult, so as to restrain the formation of conjugated polyene, and it cold be well explained by the concerted elimination mechanism of the degradation of PVC. |
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| Keywords: | PVC |
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