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  • FRPP管的老化基理及防冶

    (一) FRPP管的老化表象

    FRPPXIANLUYUTIANRANHUORENGONGTIAOJIANXIA,GONGYONGSUISHICHENDETUIYIERBIANLIEDEBIAOXIANGCHENGWEISULIAODELAOHUABIAOXIANG,CHANGJIANCHENGWEILAOHUA。

    FRPPGUANFASHENGLAOHUAKEBIAOXIANWEIRUXIAJIZHONGBIAOXIANG:①SULIAOZHIPINWAIGUANFASHENGGAIDONG,RUBIAOMIANBIANAN、BIANXING、LIEWENHUOFAMEI、ZHUILUODENG;②WULIYUHUAXUEGONGYONGFASHENGGAIDONG,RURONGJIEDU、BOLIHUAWENDU、RONGTIHUODONGSULVYUJITUANHANLIANGDENG;③LIXUEGONGYONGFASHENGGAIDONG,RULASHENQIANGDU、CHONGJIQIANGDU、KAILIESHENZHANGLVDENG;④DIANGONGYONGFASHENGGAIDONG,RUJUEYUANDIANZU、JIEDIANCHANGSHU、JICHUANDIANYADENG。

    (二) FRPP管老化的要素

    FASHENGFRPPGUANLAOHUADEYAOSUYOUNEIZAIYAOSUHEWAIZAIYAOSU。

    1.NEIZAIYAOSU

    (1)HUAXUEGUIHUADEYINGXIANG

    FRPP管老化的难易程度依赖于其化学键的强度。不一样的键具有不一样的键能,并且差异很大。聚合物分子中,分枝和侧基的存在会降低键的强度,这就发生了塑料老化难易的不一样。

    (2)DIAOJITAIGUIHUADEYINGXIANG

    DIAOJITAIGUIHUAYESHIYINGXIANGSULIAOLAOHUADEYIGEZHONGYAOYAOSU,JIEJINGXINGJUHEWUHAICUNYOUWUDINGXINGQU,JIEJINGQUYUWUDINGXINGQUDEMIDUBUYIYANG,JIEJINGDUYEBUYIYANG。SULIAOLAOHUAFANYINGDEFASHENG,ZHIXUFANYINGWU(RUYANGDENG)JINRUDAOJUHEWUGUIHUAZHONGCAIHUAYOUYIDINGDEFANYINGSUDU,FOUZELAOHUASUDUHENMAN,QIEZHIZAIBIAOMIANJINXING。YINCI,SULIAOLAOHUADEFANYINGWUXIANGSULIAOCAILIAONEIBUDEFENSANXING,SUIQIJIEJINGDUHEWUDINGXINGQUYUMIDUDEGAIDONGERYI。

    2.WAIZAIYAOSU

    FRPPGUANSHOUWAIZAIYAOSUSUOZHISHIDEHUAXUEGAIDONGSHOUYAOSHI:

    ①LIEJIESHENGCHENGDIJUWU;

    ②JIEJUSHENGCHENGDANTI;

    ③FENJIEERFANGCHUJIANLVEHUAHEWU;

    ④YANGHUAHUOJIAOLIAN。

    SHISULIAOLAOHUADEWAIJIEZUOYONGKEGAIKUOWEIWULIYAOSU(GUANG、RE、YINGLI、DIANCHANG、SHEXIANDENG)、HUAXUEYAOSU(YANG、CHOUYANG、ZHONGJINSHULIZI、HUAXUEJIEZHIDENG) YUSHENGWUYAOSU(WEISHENGWU、MEIJUNDENG)。ZAIWAIJIEZUOYONGDEZHUYAOSUZHONG,YIGUANG、YANG、RESANGEYAOSUZUIWEIZHONGYAO。YINCI,SULIAODELAOHUA,SHIZHISHANGSHISULIAOCAILIAODEGUANGLAOHUA,YANGLAOHUAYUREYANGHUADEGAIKUOXIAOYING。

    (三) FRPP管老化的防治

    SULIAODEGUANGLAOHUA,SHIZHISULIAOZAIHUWAIXIANLUZHONG,GONGYONGSUISHICHENERBIANHUAIDEBIAOXIANG,TONGCHANGCHENGWEI“QIHOULAO

    HUA”,QISHIZHISHISULIAODEGUANGLAOHUA。ZAIQIHOULAOHUADEZHUYAOSUZHONG,RIGUANGZHONGDEZIWAIXIANFUSHESHISHOUYAOYAOSU。FANGZHIGUANGLAOHUADESHOUYAOFANGFASHICANYUGUANGWENDINGJI。

    SULIAODEYANGLAOHUA,SHIZHISULIAOZAIYOUYANGCUNZAISHI,FENZILIANSHANGFASHENGDEZIDONGYANGHUAFANYING,JUYOUZIYOUJIFAN

    YINGJILI。FANGZHIYANGLAOHUADESHOUYAOFANGFASHICANYUKANGYANGJI

    FRPP管的热氧化,是指塑料在热条件下,由热本身构成的或由热推进光、氧致使的降解反应。防治热氧化的首要方法是参与热稳定剂。

    来源:FRPP管的老化基理及防冶