{"title":"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","authors":"Nathan Lesage , Maxime Vienne , Sandrine Therias , Pierre-Olivier Bussière","doi":"10.1016/j.polymdegradstab.2024.110944","DOIUrl":null,"url":null,"abstract":"<div><p>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.</p></div>","PeriodicalId":406,"journal":{"name":"Polymer Degradation and Stability","volume":"229 ","pages":"Article 110944"},"PeriodicalIF":6.3000,"publicationDate":"2024-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Photoageing and durability of a polyester-melamine organic coating on steel: New insight into degradation mechanisms\",\"authors\":\"Nathan Lesage , Maxime Vienne , Sandrine Therias , Pierre-Olivier Bussière\",\"doi\":\"10.1016/j.polymdegradstab.2024.110944\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>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.</p></div>\",\"PeriodicalId\":406,\"journal\":{\"name\":\"Polymer Degradation and Stability\",\"volume\":\"229 \",\"pages\":\"Article 110944\"},\"PeriodicalIF\":6.3000,\"publicationDate\":\"2024-08-10\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Polymer Degradation and Stability\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S014139102400288X\",\"RegionNum\":2,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"POLYMER SCIENCE\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Polymer Degradation and Stability","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S014139102400288X","RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"POLYMER SCIENCE","Score":null,"Total":0}
Photoageing and durability of a polyester-melamine organic coating on steel: New insight into degradation mechanisms
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.
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.
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