中原风采22选5走势图

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大汉动态

橡胶的来源及工艺

发布时间:2014-05-09 00:00:00 作 者:大汉机械 浏览次数: 次

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     特种型橡胶指具有某些特殊性能的橡胶。主要有:①氯丁橡胶。简称CR,由氯丁二烯聚合制得。具有良好的综合性能,耐油、耐燃、耐氧化和耐臭氧。但其密度较大,常温下易结晶变硬,贮存性不好,耐寒性差。②丁腈橡胶。简称NBR,由丁二烯和丙烯腈共聚制得。耐油、耐老化性能好  ,可在120℃的空气中或在150℃的油中长期使用。此外,还具有耐水性、气密性及优良的粘结性能。③硅橡胶。主链由硅氧原子交替组成,在硅原子上带有有机基团。耐高低温  ,耐臭氧,电绝缘性好。④氟橡胶。分子结构中含有氟原子的合成橡胶。通常以共聚物中含氟单元的氟原子数目来表示  ,如氟橡胶23,是偏二氟乙烯同三氟氯乙烯的共聚物。氟橡胶耐高温、耐油、耐化学腐蚀。⑤聚硫橡胶。由二卤代烷与碱金属或碱土金属的多硫化物缩聚而成。有优异的耐油和耐溶剂性,但强度不高,耐老化性、加工性不好,有臭味,多与丁腈橡胶并用。此外,还有聚氨酯橡胶、氯醇橡胶、丙烯酸酯橡胶等。

中原风采22选5走势图      XIANGJIAOJIAGONG:JIBENGUOCHENGBAOKUOSULIAN、HUNLIAN、YAYANHUOJICHU、CHENGXINGHELIUHUADENGJIBENGONGXU,MEIGEGONGXUZHENDUIZHIPINYOUBUTONGDEYAOQIU,FENBIEPEIHEYIRUOGANFUZHUCAOZUO。WEILENENGJIANGGEZHONGSUOXUDEPEIHEJIJIARUXIANGJIAOZHONG,SHENGJIAOSHOUXIANXUJINGGUOSULIANTIGAOQISUXING;RANHOUTONGGUOHUNLIANJIANGTANHEIJIGEZHONGXIANGJIAOZHUJIYUXIANGJIAOJUNYUNHUNHECHENGJIAOLIAO;JIAOLIAOJINGGUOYACHUZHICHENGYIDINGXINGZHUANGPILIAO;ZAISHIQIYUJINGGUOYAYANGUAJIAOHUOTUJIAODEFANGZHICAILIAO(HUOYUJINSHUCAILIAO)ZUHEZAIYIQICHENGXINGWEIBANCHENGPIN;ZUIHOUJINGGUOLIUHUAYOUJIANGJUYOUSUXINGDEBANCHENGPINZHICHENGGAODANXINGDEZUIZHONGCHANPIN。

关键词:橡胶,聚氨酯橡胶

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