CAJ | 학술논문

　　?采用热空气加速聚碳酸酯（PC）老化的方式进行不同时间下的老化实验，然后在氮气气氛下进行热失重分析，并用Coats-Redfern法和Freeman-Carroll法进行热分解动力学分析。结果表明：老化初期，PC起始分解温度、半失重温度和最大失重温度以及热降解活化能均呈下降趋势；PC的热稳定性下降，主要发生断链和端基脱落；老化后期，PC的起始分解温度、半失重温度和最大失重温度以及热降解活化能又均增大，因PC的交联可使其热稳定性有所提高。
　　?채용열공기가속취탄산지（PC）노화적방식진행불동시간하적노화실험，연후재담기기분하진행열실중분석，병용Coats-Redfern법화Freeman-Carroll법진행열분해동역학분석。결과표명：노화초기，PC기시분해온도、반실중온도화최대실중온도이급열강해활화능균정하강추세；PC적열은정성하강，주요발생단련화단기탈락；노화후기，PC적기시분해온도、반실중온도화최대실중온도이급열강해활화능우균증대，인PC적교련가사기열은정성유소제고。
The?thermal-oxidative?aging?experiments?of?polycarbonate?(PC)?were?carried?out?by?acceleration?of?hot?air?for?different?aging?time,?and?then?PC?was?analyzed?by?thermogravimetry?(TG)?in?nitrogen?and?its?kinetics?of?thermal?degradation?was?studied?with?Coats-Redfern?method?and?Freeman-Carroll?method.?The?results?show?that?the?initial?decomposition?temperature,?temperature?of?half?mass-loss,?temperature?of?maximum?mass-loss?rate?and?activation?energy?of?thermal?degradation?of?PC?tend?downwards?at?the?early?stage?of?aging.?Chain?rupture?and?end?group?dissociation?are?dominant?reactions,?and?the?thermal?stability?of?PC?declines.?At?the?late?stage?of?aging,?the?temperatures?above?mentioned?and?activation?energy?of?thermal?degradation?of?PC?increase.?The?thermal?stability?of?PC?is?improved?because?cross-linking?reaction?occurs?at?this?stage.