Mechanochemical dechlorination of polyvinyl chloride by co-grinding with various metal oxides

被引：41

作者：

Inoue, T

Miyazaki, M

Kamitani, M

Kano, J

Saito, F

机构：

[1] Sekisui Chem Co Ltd, Minami Ku, Kyoto 6018105, Japan

[2] Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Aoba Ku, Sendai, Miyagi 9808577, Japan

来源：

ADVANCED POWDER TECHNOLOGY | 2004年 / 15卷 / 02期

关键词：

grinding; polyvinyl chloride; oxide; dechlorination; degradation;

D O I：

10.1163/156855204773644445

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Polyvinyl chloride powder was ground with one of the oxide powders, i.e. CaO, Fe2O3, SiO2 and Al2O3, in air by a planetary ball mill to investigate the mechanochemical dechlorination of PVC. Grinding causes the size reduction of the each component. The PVC powder sample is degraded by grinding with reduction of molecular weight, forming C=C bonds in its structure. The dechlorination occurs in all the ground mixtures, but its phenomenon is classified into two types. One is the solid-phase reaction to form chlorides, CaOHCl and FeCl2 . 2H(2)O, when CaO and Fe2O3 powders are used. The other is the release of HCl gas by degradation when SiO2 and Al2O3 powders are used. All the same, the dechlorination yield increases not only with an increase in grinding time, but also with excess of oxide powder.

引用

页码：215 / 225

页数：11