{"title":"过氧化物催化剂的制备及其催化降解和再生废弃聚异氰脲酸酯的机理","authors":"Xiaohua Gu , Shangwen Zhu , Siwen Liu , Chin Hao Chong","doi":"10.1016/j.polymdegradstab.2024.111138","DOIUrl":null,"url":null,"abstract":"<div><div>Polyisocyanurate (PIR) foam is a modified polyurethane material that is a waste containing highly cross-linked cold-chains. In this study, we used a perovskite catalyst prepared by the sol–gel method in synergy with a dual-component alcoholysis agent for the efficient degradation of waste PIR foam. The results suggest that the perovskite catalyst with LaNiO<sub>3</sub> was applied to degrade PIR for obtaining the lowest viscosity of the alcoholic digest (3768.4 mPa·s). Infrared spectral analysis indicated that the structure of the alcohol digest obtained after alcoholysis was similar to that of polyether polyol used in the production of PIR raw materials. The recycled PIR foam was obtained by partially replacing virgin polyol with an alcohol-decomposed material for refoaming, and had better thermal properties, higher apparent density, and compression strength than the virgin PIR foam. The results of this study can be an effective aid for the large-scale recycling and reuse of waste PIR foam.</div></div>","PeriodicalId":406,"journal":{"name":"Polymer Degradation and Stability","volume":"232 ","pages":"Article 111138"},"PeriodicalIF":6.3000,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Preparation of perovskite catalysts and their mechanism of catalytic degradation and regeneration of waste polyisocyanurate\",\"authors\":\"Xiaohua Gu , Shangwen Zhu , Siwen Liu , Chin Hao Chong\",\"doi\":\"10.1016/j.polymdegradstab.2024.111138\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Polyisocyanurate (PIR) foam is a modified polyurethane material that is a waste containing highly cross-linked cold-chains. In this study, we used a perovskite catalyst prepared by the sol–gel method in synergy with a dual-component alcoholysis agent for the efficient degradation of waste PIR foam. The results suggest that the perovskite catalyst with LaNiO<sub>3</sub> was applied to degrade PIR for obtaining the lowest viscosity of the alcoholic digest (3768.4 mPa·s). Infrared spectral analysis indicated that the structure of the alcohol digest obtained after alcoholysis was similar to that of polyether polyol used in the production of PIR raw materials. The recycled PIR foam was obtained by partially replacing virgin polyol with an alcohol-decomposed material for refoaming, and had better thermal properties, higher apparent density, and compression strength than the virgin PIR foam. The results of this study can be an effective aid for the large-scale recycling and reuse of waste PIR foam.</div></div>\",\"PeriodicalId\":406,\"journal\":{\"name\":\"Polymer Degradation and Stability\",\"volume\":\"232 \",\"pages\":\"Article 111138\"},\"PeriodicalIF\":6.3000,\"publicationDate\":\"2025-02-01\",\"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/S0141391024004816\",\"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/S0141391024004816","RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"POLYMER SCIENCE","Score":null,"Total":0}
Preparation of perovskite catalysts and their mechanism of catalytic degradation and regeneration of waste polyisocyanurate
Polyisocyanurate (PIR) foam is a modified polyurethane material that is a waste containing highly cross-linked cold-chains. In this study, we used a perovskite catalyst prepared by the sol–gel method in synergy with a dual-component alcoholysis agent for the efficient degradation of waste PIR foam. The results suggest that the perovskite catalyst with LaNiO3 was applied to degrade PIR for obtaining the lowest viscosity of the alcoholic digest (3768.4 mPa·s). Infrared spectral analysis indicated that the structure of the alcohol digest obtained after alcoholysis was similar to that of polyether polyol used in the production of PIR raw materials. The recycled PIR foam was obtained by partially replacing virgin polyol with an alcohol-decomposed material for refoaming, and had better thermal properties, higher apparent density, and compression strength than the virgin PIR foam. The results of this study can be an effective aid for the large-scale recycling and reuse of waste PIR foam.
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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