Accelerated ageing of plastic jacket pipes for district heating

被引：18
|
作者：
Leuteritz, Andreas [1 ]
Doering, Klaus-Dieter [2 ]
Lampke, Thomas [3 ]
Kuehnert, Ines [1 ]
机构：
[1] Leibniz Inst Polymerforsch Dresden eV, Hohe Str 6, D-01069 Dresden, Germany
[2] IMA Mat Forsch & Anwendungstech GmbH, Wilhelmine Reichard Ring 4, D-01109 Dresden, Germany
[3] TU Chemnitz, Werkstoff & Oberflachentech, D-09107 Chemnitz, Germany
来源：
POLYMER TESTING | 2016年 / 51卷
关键词：
Polyurethane; Accelerated ageing; Plastic jacket pipes; Life time;
D O I：
10.1016/j.polymertesting.2016.03.012
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The axial shear strength of plastic jacket pipes consisting of a steel medium pipe surrounded by polyurethane insulation and a casing of polyethylene was determined after service life. Recalculation of the physical life to equivalent life at 120 degrees C with the respective Arrhenius equation showed the envelope of lifetime ends much earlier than stated as minimum requirement in EN253. A method to determine an apparent activation energy considering additionally the oxidative degradation of PUR in plastic jacket pipes is presented. Enabled gas exchange within accelerated ageing similar to 30 years of life time resulted in an apparent activation energy of 95 kJ/mol, and additionally a further degradation, obviously due to corrosion, was found. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码：142 / 147
页数：6
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