首页> 外文会议>European Additives amp; Colors Conference; 20030219-20; Antwerp(BE) >ADVANCED METHODOLOGIES FOR THE CHARACTERISATION OF THE PERFORMANCE OF LONG-TERM THERMAL ANTIOXIDANTS
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ADVANCED METHODOLOGIES FOR THE CHARACTERISATION OF THE PERFORMANCE OF LONG-TERM THERMAL ANTIOXIDANTS

机译:表征长期热抗氧化剂性能的先进方法

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In this work differently stabilised high density polyethylene (PE-HD)-types were characterised by linear-elastic fracture mechanics (LEFM ) (creep crack growth tests) and internal pressure testing. In total, 6 PE-HD formulations (2 polymer types with 3 stabiliser systems) were investigated. While no influence of stabiliser type was found in both polymer types at high crack speeds, significant effects of the added stabiliser type and concentration could be found for very low creep crack growth rates. The experimental data also indicate good agreement between the test results of the two types of tests (i.e., identical material ranking in both tests), thus corroborating the hypothesis, that the brittle or quasi-brittle failure of pressurised pipes can be predicted by a LEFM approach.
机译:在这项工作中,通过线性弹性断裂力学(LEFM)(蠕变裂纹扩展测试)和内部压力测试来表征不同稳定的高密度聚乙烯(PE-HD)型。总共研究了6种PE-HD配方(2种聚合物类型和3种稳定剂体系)。尽管在高裂纹速度下两种聚合物类型中均未发现稳定剂类型的影响,但对于非常低的蠕变裂纹生长速率,可以发现添加的稳定剂类型和浓度的显着影响。实验数据还表明,两种测试类型的测试结果之间具有良好的一致性(即两种测试中的材料等级均相同),从而证实了以下假设:通过LEFM可以预测承压管的脆性或准脆性破坏方法。

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