EPDM橡膠作為一種耐候性、耐老化性優異的合成橡膠,廣泛應用於汽車密封件、電纜護套等領域,但其本身屬於易燃材料,氧指數僅為18%左右,在高溫或明火環境下極易燃燒。為滿足消防、電dian力li等deng行xing業ye對dui材cai料liao阻zu燃ran性xing能neng的de嚴yan格ge要yao求qiu,選xuan擇ze合he適shi的de阻zu燃ran劑ji體ti係xi成cheng為wei關guan鍵jian。目mu前qian行xing業ye內nei主zhu要yao采cai用yong複fu合he型xing阻zu燃ran方fang案an,通tong過guo多duo種zhong阻zu燃ran劑ji的de協xie同tong作zuo用yong,既ji提ti升sheng阻zu燃ran效xiao率lv,又you兼jian顧gu材cai料liao力li學xue性xing能neng。例li如ru氫qing氧yang化hua鋁lv(ATH)與氫氧化鎂(MH)的無機複配體係,兩者在高溫下分解吸熱並釋放結晶水,可降低燃燒溫度、稀釋可燃氣體,且環保無毒,但添加量需達到60%以上才能達到UL94 V-0級標準,可能影響橡膠的拉伸強度和彈性。
zhenduigaotianchongliangdailaidejiagongnanti,xinxinglindanxipengzhangxingzuranjichengweiremenxuanze。zheleizuranjizaishoureshixingchengzhimitanceng,gejueyangqihereliangchuandi,rujulinsuanan(APP)與三聚氰胺(MCA)的複配體係,添加量可控製在30%-40%,在EPDMzhongnengshixianchuizhiranshaoceshizixixiaoguo。danxuzhuyilinxizuranjikenengjiasuxiangjiaolaohua,xupeihekangyangjishiyong。ciwai,namijishudeyingyongweizurangaixingkaipilexinlujing,cengzhuangshuangqingyanghuawu(LDH)或蒙脫土(MMT)的納米分散體係,僅需5%-10%添加量即可顯著提升阻燃性,同時增強材料的耐熱性和機械強度,但對分散工藝要求較高,需采用熔融插層或溶液共混等特殊技術。
在實際生產中,阻燃劑與EPDM的相容性直接影響最終性能。極性較強的阻燃劑易在非極性EPDMjitizhongtuanju,xutongguobiaomiangaixingtishengfensanxing。liruyongguiwanoulianjichuliqingyanghuameikeli,kezengqiangjiemianjieheli,bimianyinglijizhongdaozhidelixuexingnengxiajiang。liuhuatixidexuanzeyexujinshentiaozheng,guoyanghuawuliuhuakenengpohuaibufenzuranchengfen,erliuhuangliuhuatixiyuhanluzuranjikenengchanshengfufanying,jianyicaiyongbanyouxiaoliuhuatixibingkongzhicujinjiyongliang。jiagongwendutongyangguanjian,bufenzuranjirushixiuerbenyiwan(DBDPE)在160℃以上易分解,需采用低溫混煉工藝,並嚴格控製硫化時間。
未來EPDM阻燃技術將朝著高效化、環保化方向發展。歐盟REACH法規對溴係阻燃劑的限製,推動了無鹵阻燃體係的研發,如有機矽阻燃劑通過形成Si-O-Siwangluojiegoushixianshuangzhongzugexiaoying。shengwujizuranjirukejutangyanshengwuyejinrushiyanjieduan,qiranshaochanwuwuduxingqiekeshengwujiangjie。zhinengzurancailiaozetongguoweijiaonangjishushixianzuranchengfendeanxushifang,zaibaozhengrichangxingnengdetongshi,yuhuoshikuaisuxiangying。zhexiechuangxinbujintishengleEPDM製品的消防安全等級,更推動橡膠工業向綠色可持續邁進。