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塑料老化腐蚀的形式表现!

发布日期:2019-12-05 作者:www.accesserp.cn 点击:

  随温度升高,聚合物大分子能量添加,活动加剧,分子间隙增大,化学介质浸透分散加速,吸附添加,还反响速度加速,侵蚀加剧。
  With the increase of temperature, the macromolecular energy, activity, molecular gap, chemical medium penetration and dispersion, adsorption and addition, reaction speed and erosion are accelerated.
  有时温度稍高,反而有助于内应力的松懈,削减应力集中,温度转变过大过频,将发生热冲击。使安装寿命下降甚至损坏。
  Sometimes the temperature is a little higher, but it will help to relax the internal stress, reduce the stress concentration, and the temperature change is too large and too frequent, which will cause thermal shock. The installation life is reduced or even damaged.
  热和应力对塑料的毁坏也可发生协同效果,如湿尼龙在70度下运用两个月即变脆,而枯燥的尼龙在一样的温度下运用两年后,其功能仍很不变,这是由于前者在发作氧化反响的还,还发作了主链水解反响。这是热和水介质一起效果的后果。凡间大大都塑料的耐热温度都不太高,当塑料在介质中以接近临界温度运用时,必需留意热,应力,情况介质三重协同效果能够对塑料发生的毁坏。
济南塑料袋
  The destruction of plastics by heat and stress can also have synergistic effect. For example, wet nylon will become brittle after being used for two months at 70 ℃, while dry nylon will remain unchanged after being used for two years at the same temperature. This is because the former has oxidation reaction and hydrolysis reaction of main chain. This is the result of the effect of heat and water. Most plastics have low heat-resistant temperature. When the plastics are used in the medium at near critical temperature, it is necessary to pay attention to the damage of plastics caused by the triple synergistic effect of heat, stress and condition.
  所谓侵蚀是一种物质因为与情况效果而惹起的毁坏和蜕变的景象,塑料在化学介质情况的效果下,其外观,及力学功能劣化致毁坏的景象,称之为塑料的侵蚀或化学老化。化学老化是塑料老化的方式之一。
  The so-called erosion is a kind of scene of destruction and transformation caused by the effect of substance and situation. Under the effect of chemical medium, the appearance and mechanical function of plastics degrade and destroy, which is called erosion or chemical aging of plastics. Chemical aging is one of the ways of plastic aging.


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