Photoageing and durability of a polyester-melamine organic coating on steel: New insight into degradation mechanisms

IF 6.3 2区化学 Q1 POLYMER SCIENCE Polymer Degradation and Stability Pub Date : 2024-08-10 DOI:10.1016/j.polymdegradstab.2024.110944

Nathan Lesage , Maxime Vienne , Sandrine Therias , Pierre-Olivier Bussière

引用次数: 0

Abstract

This study aims to understand the behaviour of a polyester-melamine coating subjected to accelerated artificial photooxidative ageing using analysis at different scales (from molecular to macroscopic) with different techniques (IR, DSC, GC, etc.) and to gain global insight into its degradation. The samples were studied in self-standing films and on coated steel plates with a coating thickness of 25 µm. Two formulations (with and without antioxidant) were characterised, focusing on the degradation of the material under accelerated artificial photoageing. The mechanism of photodegradation of polyester-melamine was investigated by performing different analyses. It was also shown that the stabilising effect of the antioxidant is detected only at the molecular scale (kinetics with IR) but not at the macromolecular or macroscopic scale.

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钢材聚酯-三聚氰胺有机涂层的光老化和耐久性：对降解机制的新认识

本研究旨在通过不同技术（红外、DSC、气相色谱等）对不同尺度（从分子到宏观）的分析，了解聚酯-三聚氰胺涂层在加速人工光氧化老化过程中的行为，并全面了解其降解情况。研究了自立薄膜和涂层厚度为 25 µm 的涂层钢板上的样品。对两种配方（含抗氧化剂和不含抗氧化剂）进行了表征，重点研究了材料在加速人工光老化条件下的降解情况。通过进行不同的分析，研究了聚酯-密胺的光降解机理。研究还表明，抗氧化剂的稳定作用只能在分子尺度上检测到（红外动力学），而不能在大分子或宏观尺度上检测到。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Polymer Degradation and Stability 化学-高分子科学

CiteScore

10.10

自引率

10.20%

发文量

325

审稿时长

23 days

期刊介绍： Polymer Degradation and Stability deals with the degradation reactions and their control which are a major preoccupation of practitioners of the many and diverse aspects of modern polymer technology. Deteriorative reactions occur during processing, when polymers are subjected to heat, oxygen and mechanical stress, and during the useful life of the materials when oxygen and sunlight are the most important degradative agencies. In more specialised applications, degradation may be induced by high energy radiation, ozone, atmospheric pollutants, mechanical stress, biological action, hydrolysis and many other influences. The mechanisms of these reactions and stabilisation processes must be understood if the technology and application of polymers are to continue to advance. The reporting of investigations of this kind is therefore a major function of this journal. However there are also new developments in polymer technology in which degradation processes find positive applications. For example, photodegradable plastics are now available, the recycling of polymeric products will become increasingly important, degradation and combustion studies are involved in the definition of the fire hazards which are associated with polymeric materials and the microelectronics industry is vitally dependent upon polymer degradation in the manufacture of its circuitry. Polymer properties may also be improved by processes like curing and grafting, the chemistry of which can be closely related to that which causes physical deterioration in other circumstances.