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Modeling the degradation of natural rubber male condoms

机译：模拟天然橡胶男用避孕套的降解

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摘要

Most condom manufacturers claim a 5 year shelf-life for their products; however, condoms can decay much more rapidly than the reported shelf-life would suggest, because of the uncontrolled storage conditions. For this reason, development of mathematical model to predict condom shelf-life as a function of storage conditions can be very useful. In this work, six brands of condoms were aged under subtropical ambient conditions for 5 years and under accelerated conditions at four temperatures for various times. The changes in burst pressure and burst volume were used as the main indicators of product degradation. Experimental data were analyzed and two mathematical models (both based on the reparameterized Arrhenius equation) were proposed to describe the obtained data. It is shown for the first time that it is possible to estimate and predict the degradation of natural rubber condoms with confidence with the help of the proposed models, based on data obtained from accelerated degradation experiments, provided that different activation energies are used for the burst pressure and volume.
机译：大多数安全套制造商声称其产品的保质期为5年。然而，由于不受控制的储存条件，避孕套的腐烂速度比报道的保质期快得多。因此，开发数学模型来预测避孕套的保质期取决于储存条件可能非常有用。在这项工作中，六个品牌的避孕套在亚热带环境条件下老化了5年，在加速条件下在四个温度下老化了不同的时间。破裂压力和破裂体积的变化用作产物降解的主要指标。分析了实验数据，并提出了两个数学模型（均基于重新参数化的Arrhenius方程）来描述获得的数据。首次表明，基于从加速降解实验获得的数据，假设使用不同的活化能进行爆破，借助于所提出的模型，可以有信心地估计和预测天然橡胶避孕套的降解。压力和体积。

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