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    常用類型橡膠的特性及用途

    發布時間:2017-07-12 23:10:00 點擊:    關鍵詞:密煉機,捏煉機,開煉機,橡膠機械

    泰州科德橡膠機械:橡膠廣泛應用在機械制造、醫療、模具加工等方面,各種托輥與膠輥中也涵蓋了不同的橡膠原材料制成的產品,比如橡膠托輥、聚氨酯托輥、丁苯膠輥等,天然橡膠以橡膠烴(聚異戊二烯)為主,含少量蛋白質、水分、樹脂酸、糖類和無機鹽等。

    天然橡膠彈性大,定伸強度高,抗撕裂性和電絕緣性優良,耐磨性和耐旱性良好,加工性佳,天然橡膠易與其它材料粘合,在綜合性能方面優于多數合成橡膠。天然橡膠的缺點是耐氧和耐臭氧性差,容易老化變質;耐油和耐溶劑性不好,低抗酸堿的腐蝕能力低;耐熱性不高。天然橡膠使用溫度范圍:約-60℃~+80℃。 天然橡膠用于制作輪胎、膠鞋、膠管、膠帶、電線電纜的絕緣層和護套以及其他通用制品。天然橡膠特別適用于制造扭振消除器、發動機減震器、機器支座、橡膠-金屬懸掛元件、膜片、模壓制品。
      2、丁苯橡膠(SBR)
      丁苯橡膠是丁二烯和苯乙烯的共聚體。丁苯橡膠的性能接近天然橡膠,是目前產量大的通用合成橡膠,丁苯橡膠特點是耐磨性、耐老化和耐熱性超過天然橡膠,質地也較天然橡膠均勻。丁苯橡膠的缺點是:彈性較低,抗屈撓、抗撕裂性能較差;加工性能差,特別是自粘性差、生膠強度低。丁苯橡膠使用溫度范圍:約-50℃~+100℃。丁苯橡膠主要用以代替天然橡膠制作輪胎、膠板、膠管、膠鞋及其他通用制品。
      3、順丁橡膠(BR)
      順丁橡膠是由丁二烯聚合而成的順式結構橡膠。順丁橡膠優點是:彈性與耐磨性優良,耐老化性好,耐低溫性優異,在動態負荷下發熱量小,易于金屬粘合。順丁橡膠缺點是強度較低,抗撕裂性差,加工性能與自粘性差。順丁橡膠使用溫度范圍:約-60℃~+100℃。 一般多和天然橡膠或丁苯橡膠并用,順丁橡膠主要制作輪胎胎面、運輸帶和特殊耐寒制品。
      4、異戊橡膠(IR)
      異戊橡膠是由異戊二烯單體聚合而成的一種順式結構橡膠。異戊橡膠的化學組成、立體結構與天然橡膠相似,性能也非常接近天然橡膠,故有合成天然橡膠之稱。異戊橡膠具有天然橡膠的大部分優點,耐老化由于天然橡膠,彈性和強力比天然橡膠稍低,加工性能差,成本較高。異戊橡膠使用溫度范圍:約-50℃~+100℃ 可代替天然橡膠制作輪胎、膠鞋、膠管、膠帶以及其他通用制品。
      5、氯丁橡膠(CR)
      氯丁橡膠是由氯丁二烯做單體乳液聚合而成的聚合體。氯丁橡膠分子中含有氯原子,所以氯丁橡膠與其他通用橡膠相比:氯丁橡膠具有優良的抗氧、抗臭氧性,不易燃,著火后能自熄,耐油、耐溶劑、耐酸堿以及耐老化、氣密性好等優點;氯丁橡膠物理機械性能也比天然橡膠好,故可用作通用橡膠,也可用作特種橡膠。氯丁橡膠主要缺點是耐寒性較差,比重較大、相對成本高,電絕緣性不好,加工時易粘滾、易焦燒及易粘模。此外,生膠穩定性差,不易保存。氯丁橡膠使用溫度范圍:約-45℃~+100℃。氯丁橡膠主要用于制造要求抗臭氧、耐老化性高的電纜護套及各種防護套、保護罩;耐油、耐化學腐蝕的膠管、膠帶和化工襯里;耐燃的地下采礦用橡膠制品,以及各種模壓制品、密封圈、墊、粘結劑等。
      6、丁基橡膠(IIR)
      丁基橡膠是異丁烯和少量異戊二烯或丁二烯的共聚體。丁基橡膠大特點是氣密性好,耐臭氧、耐老化性能好,耐熱性較高,長期工作溫度可在130℃以下;丁基橡膠能耐無機強酸(如硫酸、硝酸等)和一般有機溶劑,吸振和阻尼特性良好,電絕緣性也非常好。丁基橡膠的缺點是彈性差,加工性能差,硫化速度慢,粘著性和耐油性差。丁基橡膠使用溫度范圍:約-40℃~+120℃。丁基橡膠主要用作內胎、水胎、氣球、電線電纜絕緣層、化工設備襯里及防震制品、耐熱運輸帶、耐熱老化的膠布制品。
      7、丁腈橡膠(NBR)
      丁腈橡膠是丁二烯和丙烯腈的共聚體。丁腈橡膠特點是耐汽油和脂肪烴油類的性能特別好,僅次于聚硫橡膠、丙烯酸酯和氟橡膠,而丁腈橡膠優于其他通用橡膠。耐熱性好,氣密性、耐磨及耐水性等均較好,粘結力強。丁腈橡膠缺點是耐寒及耐臭氧性較差,強力及彈性較低,耐酸性差,電絕緣性不好,耐極性溶劑性能也較差。丁腈橡膠使用溫度范圍:約-30℃~+100℃。丁腈橡膠主要用于制造各種耐油制品,如膠管、密封制品等。
      8、氫化丁腈橡膠(HNBR)
      氫化丁腈橡膠是丁二烯和丙烯腈的共聚體。氫化丁腈橡膠是通過全部或部分氫化NBR的丁二烯中的雙鍵而得到的。氫化丁腈橡膠特點是機械強度和耐磨性高,用過氧化物交聯時耐熱性比NBR好,其他性能與丁晴橡膠一樣。氫化丁腈橡膠缺點是價格較高。氫化丁腈橡膠使用溫度范圍:約-30℃~+150℃。氫化丁腈橡膠主要用于耐油、耐高溫的密封制品。
      9、乙丙橡膠(EPM\EPDM)
      乙丙橡膠是乙烯和丙烯的共聚體,一般分為二元乙丙橡膠和三元乙丙橡膠。乙丙橡膠特點是抗臭氧、耐紫外線、耐天候性和耐老化性優異,居通用橡膠之首。乙丙橡膠的電絕緣性、耐化學性、沖擊彈性很好,耐酸堿,比重小,可進行高填充配合。耐熱可達150℃,耐極性溶劑-酮、酯等,但乙丙橡膠不耐脂肪烴和芳香烴,乙丙橡膠其他物理機械性能略次于天然橡膠而優于丁苯橡膠。乙丙橡膠缺點是自粘性和互粘性很差,不易粘合。乙丙橡膠使用溫度范圍:約-50℃~+150℃。乙丙橡膠主要用作化工設備襯里、電線電纜包皮、蒸汽膠管、耐熱運輸帶、汽車用橡膠制品及其他工業制品。
      10、硅橡膠(SIL)
      硅橡膠為主鏈含有硅、氧原子的特種橡膠,硅橡膠中起主要作用的是硅元素。硅橡膠主要特點是既耐高溫(高300℃)又耐低溫(低-100℃),是目前好扥艾寒、耐高溫橡膠;同時硅橡膠電絕緣性優良,對熱氧化和臭氧的穩定性很高,化學惰性大。硅橡膠的缺點是機械強度較低,耐油、耐溶劑和耐酸堿性差,較難硫化,價格較貴。硅橡膠使用溫度:-60℃~+200℃。硅橡膠主要用于制作耐高低溫制品(膠管、密封件等)、耐高溫電線電纜絕緣層,由于其無毒無味,硅橡膠還用于食品及醫療工業。
      11、氟橡膠(FPM)
      氟橡膠是由含氟單體共聚而成的有機彈性體。氟橡膠特點耐溫高可達300℃,耐酸堿,耐油性是耐油橡膠中好的,抗輻射、耐高真空性能好;電絕緣性、機械性能、耐化學腐蝕性、耐臭氧、耐大氣老化性均優良。氟橡膠缺點是加工性差,價格昂貴耐寒性差,彈性透氣性較低。氟橡膠使用溫度范圍:-20℃~+200℃。氟橡膠主要用于國防工業制造飛機、火箭上的耐真空、耐高溫、耐化學腐蝕的密封材料、膠管或其他零件及汽車工業。
      12、聚氨酯橡膠(AU\EU)
      聚氨酯橡膠有聚酯(或聚醚)與二異氰酸酯類化合物聚合而成的彈性體。聚氨酯橡膠的特點是耐磨性好,在各種橡膠中是好的;聚氨酯橡膠強度高、彈性好、耐油性優良。聚氨酯橡膠的耐臭氧、耐老化、氣密性等也優異。聚氨酯橡膠的缺點是耐溫性能較差,耐水和耐堿性差,耐芳香烴、氯化烴及酮、酯、醇類等溶劑性較差。聚氨酯橡膠使用溫度范圍:約-30℃~+80℃。聚氨酯橡膠用作制作輪胎緊挨由零件、墊圈、防震制品,以及耐磨、高強度和耐油的橡膠制品。
      13、丙烯酸酯橡膠(ACM\AEM)
      丙烯酸酯橡膠是丙烯酸乙酯或丙烯酸丁酯的聚合物。丙烯酸酯橡膠特點是兼有良好的耐熱、耐油性能,在含有硫、磷、氯添加劑的潤滑油中性能穩定。同時丙烯酸酯橡膠耐老化、耐氧和臭氧、耐紫外線、氣密性優良。丙烯酸酯橡膠缺點是耐寒性差,不耐水,不耐蒸汽及有機和無機酸、堿。在甲醇、乙二醇、酮酯等水溶性溶液內膨脹嚴重。同時丙烯酸酯橡膠的彈性和耐磨性差,電絕緣性差,加工性能較差。丙烯酸酯橡膠使用溫度范圍:約-25℃~+150℃。丙烯酸酯橡膠可用于制造耐油、耐熱、耐老化的制品,如密封件、膠管、化工襯里等。
      14、氯磺化聚乙烯橡膠(CSM)
      氯磺化聚乙烯橡膠是聚乙烯經氯化和磺化處理后,所得到具有彈性的聚合物。氯磺化聚乙烯橡膠耐臭氧緊挨老化優良,耐候性優于其它橡膠。氯磺化聚乙烯橡膠阻燃、耐熱、耐溶劑性及耐大多數化學藥品和耐酸堿性能較好。氯磺化聚乙烯橡膠電絕緣性尚可,耐磨性與丁苯橡膠相似。氯磺化聚乙烯橡膠缺點是抗撕裂性能差,加工性能不好。氯磺化聚乙烯橡膠使用溫度范圍:約-20℃~+120℃。氯磺化聚乙烯橡膠可用作臭氧發生器上的密封材料,制造耐油密封件、電線電纜包皮以及耐油橡膠制品和化工襯里。
      15、氯醇橡膠(CO\ECO)
      氯醇橡膠由環氧氯丙烷均聚或由環氧氯丙烷與環氧乙烷共聚而成的聚合物。氯醇橡膠特點是耐脂肪烴及氯化烴溶劑、耐堿、耐水、耐老化性能極好,耐臭氧性。氯醇橡膠可用作膠管、密封件、薄膜和容器襯里、油箱、膠輥,制造油封、水封等。
      16、氯化聚乙烯橡膠(CM或CPE)
      氯化聚乙烯橡膠是聚乙烯通過氯取代反應制成的具有彈性的聚合物。氯化聚乙烯橡膠性能與氯磺化聚乙烯橡膠接近,氯化聚乙烯橡膠特點是流動性好,容易加工;氯化聚乙烯橡膠有優良的耐天候性、耐臭氧性和耐電暈性,耐熱、耐酸堿、耐油性良好。氯化聚乙烯橡膠缺點是彈性差、壓縮變形較大,電絕緣性較低。氯化聚乙烯橡膠使用溫度范圍:約-20℃~+120℃。氯化聚乙烯橡膠用作電線電纜護套、膠管、膠帶、膠輥化工襯里等。
      17、羧基丁腈橡膠(XNBR)
      羧基丁腈橡膠系由丁二烯、丙烯腈和有機酸(丙烯酸、甲基丙烯酸等)三元共聚而成。羧基丁腈橡膠是在丁腈橡膠中引入羧基可改進其拉伸強度、撕裂強度、硬度、耐磨性、粘著性和抗臭氧老化性,羧基丁腈橡膠特別是可改善高溫下的拉伸強度。引入羧基還能提高丁腈橡膠分子的極性,增大與聚氯乙烯,酚醛樹脂等的相容性。羧基丁腈橡膠應用范圍:羧基丁腈橡膠可以單獨使用,也可以與其它彈性體并用,羧基丁腈橡膠主要用于膠管、膠帶密封件、O 型圈、膠輥、膠鞋及各種模制品,油井專用品、環氧樹脂增韌及生產高性能粘合劑產品的專用材料。


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