INFLUENCE OF THE TACTICITY ON THERMAL-DEGRADATION OF PVC .3. VERIFICATION BY OZONIZATION OF DEGRADED SAMPLES

被引：13

作者：

MARTINEZ, G

MILLAN, J

机构：

[1] Instituto de Plásticos y Caucho, CS.I.C, Madrid

来源：

ANGEWANDTE MAKROMOLEKULARE CHEMIE | 1979年 / 75卷 / FEB期

关键词：

D O I：

10.1002/apmc.1979.050750116

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Two sets of ozonization reactions, for 1 h and 24 h respectively, have been carried out at −20°C on degraded samples of PVC having different contents of tactic sequences. The evolution of the polyene sequences distribution with the ozonization was followed by UV‐Visible spectroscopy. The number of chain scissions of ozonized samples was calculated from the number average molecular weight measurements before and after ozonization. The observed increase of short polyenes relative to the long polyenes with ozonization was found to depend markedly on the content of syndiotactic sequences. On the other hand, the number of chain scissions after total ozonization was found to be the higher the lower the content of tactic sequences in PVC samples is. © 1979 Hüthig & Wepf Verlag, Basel

引用

页码：215 / 222

页数：8

共 11 条

[1]

Braun D., 1971, PURE APPL CHEM, V26, P173, DOI [10.1351/pac197126020173, DOI 10.1351/PAC197126020173]

[2] ANALYSIS OF ULTRAVIOLET-VISIBLE SPECTRUM OF DEGRADED POLYVINYL-CHLORIDE) TO DETERMINE POLYENE CONCENTRATIONS [J].