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Polymer degradation is the reduction in the physical properties of a polymer, such as strength, caused by changes in its chemical composition. Polymers and particularly plastics are subject to degradation at all stages of their product life cycle, including during their initial processing, use, disposal into the environment and recycling. The rate of this degradation varies significantly; biodegradation can take decades, whereas some industrial processes can completely decompose a polymer in hours.

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  • Degradation von Kunststoffen (de)
  • Degradación polimérica (es)
  • Dégradation d'un polymère (fr)
  • Polymer degradation (en)
  • Degradação de polímeros (pt)
  • Деструкция полимеров (ru)
  • 聚合物降解 (zh)
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  • La plupart des polymères organiques (et des matériaux correspondants) sont, de par leur structure caténaire, considérés comme des composés « vivants », car sensibles à leur environnement et sujets au vieillissement. La dégradation d'un polymère est le changement, généralement non désiré, de ses propriétés physiques et mécaniques, causé par des facteurs environnementaux plus ou moins agressifs : attaque d'un produit chimique tel un acide concentré, dioxygène (oxydation), chaleur, radiation (photolyse), eau (hydrolyse), contrainte, etc. Ensemble, ces facteurs agissent souvent en synergie. La dégradation peut rendre le matériau inutilisable. (fr)
  • Деструкция полимеров (также деградация полимеров; англ. Polymer degradation) — разрушение (фрагментация) макромолекул при воздействии одного или нескольких из факторов окружающей среды — тепла, влаги, света, радиации, механических напряжений, химических (контакт с кислотами, щелочами и рядом солей), биологических и других факторов. Подобные процессы — часто называемые «старением» — обычно нежелательны, поскольку приводят к растрескиванию полимерных изделий; реже они желательны, поскольку важны для биодеградации материалов или при искусственном снижении молекулярной массы полимера перед его повторным использованием. (ru)
  • 聚合物降解(polymer degradation)是在聚合物加工过程中,可能在和应力作用下或者在聚合物中的微量水分、酸、碱等杂质以及空气中氧的作用,而导致分裂成较小部分,大分子结构改变,分子量降低等化学变化的过程。 (zh)
  • Degradación polimérica es un cambio en las propiedades —, color, forma, etc.—de un polímero o producto basado en dicho compuesto, bajo la influencia de uno o varios factores ambientales como el calor, la luz o químicos como ácidos, alcalinos y algunas sales. Estos cambios son usualmente indeseables tal como el cracking y la desintegración química de productos, o rara vez deseable en biodegradación o disminuir deliberadamente el peso molecular de un polímero para ser reciclado. Los cambios en las propiedades comúnmente se denominan "envejecimiento".​ (es)
  • Degradation bezeichnet bei Kunststoffen deren Abbau oder Zerfall. Gemeint ist damit häufig die Alterung, verbunden mit Quellung, Versprödung, Rissbildung und Festigkeits­verlust. Die Degradation ist üblicherweise ein unerwünschter Vorgang. (de)
  • Polymer degradation is the reduction in the physical properties of a polymer, such as strength, caused by changes in its chemical composition. Polymers and particularly plastics are subject to degradation at all stages of their product life cycle, including during their initial processing, use, disposal into the environment and recycling. The rate of this degradation varies significantly; biodegradation can take decades, whereas some industrial processes can completely decompose a polymer in hours. (en)
  • A degradação de polímeros é uma reação química que causa alterações irreversíveis nas propriedades de compostos poliméricos. Os polímeros estão sujeitos à degradação em todas as fases do ciclo de vida do produto, que inclui o processamento inicial, uso, descarte no meio ambiente e reciclagem. A taxa de degradação pode variar significativamente, podendo levar décadas, como a biodegradação, até horas, como em alguns processos industriais. (pt)
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