THERMAL-ANALYSIS FOR THE ASSESSMENT OF ANTIOXIDANT CONTENT IN POLYETHYLENE

被引：19

作者：

KARLSSON, K ^{[1
]}

ASSARGREN, C ^{[1
]}

GEDDE, UW ^{[1
]}

机构：

[1] STUDSVIK AB,MAT TECHNOL,S-61182 NYKOPING,SWEDEN

来源：

POLYMER TESTING | 1990年 / 9卷 / 06期

关键词：

D O I：

10.1016/0142-9418(90)90033-A

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Dynamic differential thermal analysis (DTA) data on a series of polyethylene (PE) samples containing known contents of two primary (phenol and amine) and two secondary (thioester and phosphite) antioxidants are presented. It is shown that the dynamic method, in which the temperature of the start of an exothermal oxidation reaction is measured during a constant heating rate experiment performed in an oxygen atmosphere, can be used as an analytical tool by which the antioxidant content can be determined. A relationship between the oxidation temperature and the concentration of antioxidant is derived on the assumption that the antioxidant consumption follows zero-order kinetics and that the rate constant may be defined in accordance with the Arrhenius equation. This equation fits the presented experimental data for samples with intimately mixed antioxidant.

引用

页码：421 / 431

页数：11

共 10 条

[1]

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[2]

BILLINGHAM NC, 1981, DEV POLYM DEGRADATIO, V3, P63

[3] MOLECULAR-STRUCTURE AND MORPHOLOGY OF CROSSLINKED POLYETHYLENE IN AN AGED HOT-WATER PIPE [J].