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Long-term studies on PVC membranes used in tunnels

机译:隧道中使用的PVC膜的长期研究

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Building tunnels places very high demands on the durability of all materials used. However, up to now only very few real long-term studies on waterproofing membranes used in tunnels have been carried out. Samples from soft poly(vinyl chloride) membranes with diverse ages of over 40 years were taken during refurbishment programs to ensure safety in various Swiss tunnels. The results of gel permeation chromatography as well as measurements of the plasticizer and gel content showed that all of the membranes have very low polymer degradation or, respectively, none detectable crosslinking of the polymer. The main change determined was the decrease in plasticizer content and the resulting increase in stiffness of the membranes. (c) 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46689.
机译:建筑隧道对所用材料的耐用性施加非常高。 然而,目前迄今为止仅对隧道中使用的防水膜进行了很少的实际长期研究。 在翻新计划期间采取了来自软聚(氯乙烯)膜的样品,以40多年以上超过40岁以确保各种瑞士隧道的安全性。 凝胶渗透色谱结果的结果以及增塑剂和凝胶含量的测量结果表明,所有膜都具有非常低的聚合物劣化,或者分别没有可检测的聚合物交联。 确定的主要变化是增塑剂含量的降低以及膜的刚度升高。 (c)2018 Wiley期刊,Inc.J.Phill。 聚合物。 SCI。 2018,135,46689。

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