合成材料老化与应用2023年第52卷第1期35覆铜板半固化环氧树脂热分解行为李标，管妮（广州合成材料研究院有限公司，广东广州510665）摘要：采用热重分析（TG）以不同的升温速率（5、10、15、20、30℃/min）分别在氮气气氛和空气气氛下对覆铜板中双氰胺固化环氧树脂热分解行为进行了研究，讨论不同升温速率以及不同气氛下双氰胺固化双酚A环氧树脂的热分解行为的变化。研究发现环氧树脂的TG曲线随升温速率的提高移向高温区，说明热分解温度随升温速率的增加而上升。DTA曲线的峰顶随着升温速率的增加移向高温段，说明受热分解所需达到的温度更高。氮气气氛下环氧树脂只有一个阶段的受热分解且其分解放热量较小，而空气气氛下环氧树脂则分两个阶段进行且其分解放热量高，主要集中在第二阶段放热，说明环氧树脂在空气气氛下与空气中的成分发生了复杂的热分解反应。关键词：覆铜板中双氰胺固化环氧树脂；热分解行为；热分解速率；放热量中图分类号：TQ311StudyonThermalDecompositionBehaviorofSemi-curedEpoxyResininCopperCladPlatesLIBiao,GUANGNi(GugangzhouSyntheticMaterialsResearchInstituteCo.Ltd.,Guangzhou510665,Guangdong,China)Abstract:Inthispaper,thermaldecompositionbehaviorofdicyandiamidecuredepoxyresinincoppercladplatewasstudiedbythermogravimetric(TG)analysisatdifferentheatingrates(5、10、15、20、30℃/min)innitrogenatmosphereandairatmosphererespectively.ThethermaldecompositionbehaviorsofbisphenolAepoxyresincuredbydicyandiamideunderdifferentheatingrateanddifferentatmospherewerediscussed.ThestudyfoundthattheTGcurvesofepoxyresinmovedtothehightemperatureregionwiththeincreaseoftheheatingrate,indicatingthatthethermaldecompositiontemperatureincreasedwiththeincreaseofheatingrate.ThepeakofDTAcurvemovedtothehightemperatureregionwiththeincreaseoftheheatingrate,indicatingthatthethermaldecompositionrequiredforhighertemperature.Thethermaldecompositionofepoxyresininnitrogenatmospherewasonlyonestagewithlessheatreleasing.Intheairatmosphere,thethermaldecompositionofepoxyresinwasdividedintotwostagesanditsdecompositionheatwashigh,whichwasattributedtoconcentratedheatreleaseinthesecondstage.Italsoshowedthattheepoxyresinhadacomplexthermaldecompositionreactionwit...
