oil weathering

The stress relaxation of 8 types of vulcanizates during the atmospheric aging test has been evaluated.

对８种不同类型的硫化橡胶在大气老化试验时的应力松弛变化进行了探讨。

To evaluate the ageing performances and predict the service life of polypropylene (PP) woven geotextiles, three outdoor ageing conditions are provided in Shanghai which are atmospheric ageing, soil-buried ageing and under-water ageing experiments.

为了评价和预测聚丙烯土工织物在实际使用条件下的使用寿命,在上海地区的户外环境下,采用3种不同的老化试验条件,即大气自然老化、沙土掩埋老化和水下老化,研究聚丙烯土工织物的老化行为。