PVC热稳定性的研究.doc

PVC热稳定剂的研究摘要:聚***乙烯(PVC)是产量仅次于聚乙烯(PE)的第二大通用塑料,具有强度高且可增塑、耐腐蚀、难燃、绝缘性好、透明性高等优点,通过加入适当的添加剂和使用适当的工艺和设备可生产出各式各样的塑料制品,包括板材、管材、管件、异型材等硬制品和膜、管、鞋、玩具、电缆料、人造革等软制品,广泛应用于工业建筑、农业、日用品、包装、电力、公用事业等领域。但是聚***乙烯及***化石蜡等有机卤代物,由于其本身的结构缺陷,在受热使用过程中,会发生分解反应,产生卤化氢,导致卤代物的破坏和加工设备的损坏等严重后果,因此卤代物在受热使用过程中必须添加热稳定剂,以防止卤化氢及进一步的不利结果产生。因此,热稳定剂是PVC加工的必须添加剂。关键词:热稳定剂;聚***乙烯(PVC);钙锌热稳定剂;稀土热稳定剂;有机热稳定剂Abstract:Polyvinylchloride(PVC)isoutputsecondonlytopolyethylene(PE)ofthesecondgeneralplasticsandhastheadvantagesofhighstrengthandplasticizingandcorrosionresistant,flameretardant,goodinsulation,hightransparencyandadvantages,byaddingproperadditiveandusingappropriatetechnologyandequipmentcanproducevariouskindsofplasticproducts,includingrigidsheet,pipe,pipe,profile,,tubes,shoes,toys,cablematerials,artificialleather,soft-ware,widelyusedinindustrialconstruction,agriculture,dailynecessities,packaging,electricpower,,becauseofitsownstructuraldefects,heatintheuseprocess,ur,generatehydrogenhalides,resultinginhalidesdestructionandprocessingequipmentdamageandotherseriousconsequences,poundsinheatedusingaprocessmustbeaddedtotheheatstabilizer,,:polyvinylchloride;heatstabilizerIcalcium/zincstabilizer;anicstabilizer正文:聚***乙烯(PVC)是世界第三大通用塑料,产量仅次于聚乙烯(PE)和聚丙烯(