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偶联剂的种类、特点及应用

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偶联剂的种类、特点及应用

发布日期:2017-10-02 作者:兰州三金化工有限责任公司 点击:

今天兰州三金化工有限责任公司小编和您一起学习一下偶联剂的种类、特点及应用。 

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1、GUIWANOULIANJI          

GUIWANOULIANJISHIRENMENYANJIUZUIZAO、YINGYONGZUIZAODEOULIANJI。YOUYUQIDUTEDEXINGNENGJIXINCHANPINDEBUDUANWENSHI,SHIQIYINGYONGLINGYUZHUJIANKUODA,YICHENGWEIYOUJIGUIGONGYEDEZHONGYAOFENZHI。TASHIJINNIANLAIFAZHANJIAOKUAIDEYILEIYOUJIGUICHANPIN,QIPINZHONGFANDUO,JIEGOUXINYING,JINYIZHIJIEGOUDECHANPINJIUYOUBAIYUZHONG。1945NIANQIANHOUYOUMEIGUOLIANTAN(UC)HEDAOKANGNING(DOW  CORNING)DENGGONGSIKAIFAHEGONGBULEYIXILIEJUYOUDIANXINGJIEGOUDEGUIWANOULIANJI;1955NIANYOUYOUUCGONGSISHOUCITICHULEHANANJIDEGUIWANOULIANJI;CONG1959NIANKAISHILUXUCHUXIANLEYIXILIEGAIXINGANJIGUIWANOULIANJI;20SHIJI60NIANDAICHUQICHUXIANDEHANGUOYANGJIGUIWANOULIANJIHE60NIANDAIMOQICHUXIANDEJUYOUZHONGDANHEDIEDANJIEGOUDEGUIWANOULIANJI,YOUDADAFENGFULEGUIWANOULIANJIDEPINZHONG。JINJISHINIANLAI,SUIZHEBOLIXIANWEIZENGQIANGSULIAODEFAZHAN,CUJINLEGEZHONGOULIANJIDEYANJIUYUKAIFA。GAIXINGANJIGUIWANOULIANJI、GUOYANGJIGUIWANOULIANJIHEDIEDANJIGUIWANOULIANJIDEHECHENGYUYINGYONGJIUSHIZHEIYISHIQIDEZHUYAOCHENGGUO。WOGUOYU20SHIJI60NIANDAIZHONGQIKAISHIYANZHIGUIWANOULIANJI。SHOUXIANYOUZHONGGUOKEXUEYUANHUAXUEYANJIUSUOKAISHIYANZHIΓGUANNENGTUANGUIWANOULIANJI,NANJINGDAXUEYETONGSHIKAISHIYANZHIΑGUANNENGTUANGUIWANOULIANJI。         

2、JIEGOUHEZUOYONGJILI         

 GUIWANOULIANJIDETONGSHIWEIRNSIX(4-N),SHIZHONGRWEIFEISHUIJIEDE、KEYUGAOFENZIJUHEWUJIEHEDEYOUJIGUANNENGTUAN。GENJUGAOFENZIJUHEWUDEBUTONGXINGZHI,RYINGYUJUHEWUFENZIYOUJIAOQIANGDEQINHELIHUOFANYINGNENGLI,RUJIAJI、YIXIJI、ANJI、HUANYANGJI、QIUJI、BINGXIXIANYANGBINGJIDENG。XWEIKESHUIJIEJITUAN,YUSHUIRONGYE、KONGQIZHONGDESHUIFENHUOWUJIWUBIAOMIANXIFUDESHUIFENJUNKEYINQIFENJIE,YUWUJIWUBIAOMIANYOUJIAOHAODEFANYINGXING。DIANXINGDEXJITUANYOUWANYANGJI、FANGYANGJI、XIANJI、LVJIDENG;ZUICHANGYONGDEZESHIJIAYANGJIHEYIYANGJI,TAMENZAIOULIANFANYINGZHONGFENBIESHENGCHENGJIACHUNHEYICHUNFUCHANWU。YOUYULVGUIWANZAIOULIANFANYINGZHONGSHENGCHENGYOUFUSHIXINGDEFUCHANWULVHUAQING,YINCIYAOZHUOQINGSHIYONG。          

JINNIANLAI,XIANGDUIFENZIZHILIANGJIAODAHEJUYOUTEZHONGGUANNENGTUANDEGUIWANOULIANJIFAZHANHENKUAI,RUXINXIJI、SHIERWANJI,HAIYOUHANGUOYANGJI、NIAOJI、TANGWANYANGJIHEYANGLIZITINGJIGUIWANOULIANJIDENG。LAWRENCEDENGLIYONGGUIWANOULIANJIDUITANXIANWEIBIAOMIANJINXINGCHULI,OULIANJIZHONGDEJIAJIGUIWANYANGDUANJISHUIJIESHENGCHENGDEGUIQIANGJIYUTANXIANWEIBIAOMIANDEQIANGJIGUANNENGTUANJINXINGJIANHE,JIEGUOFUHECAILIAODELASHENQIANGDUHEMOLIANGTIGAO,KONGQIKONGXILVXIAJIANG。ZAOZAI1947NIANMEIGUOJOHNSHOPKINSDAXUEDEWITTRWDENGZAIYIFENBAOGAOZHONGZHICHU,ZAIDUIWANJILVGUIWANOULIANJICHULIBOLIXIANWEIBIAOMIANDEYANJIUZHONGFAXIAN,YONGHANYOUNENGYUSHUZHIFANYINGDEGUIWANJITUANCHULIBOLIXIANWEIZHICHENGJUZHIBOLIGANG,QIQIANGDUKETIGAO2BEIYISHANG。TAMENRENWEI,YONGWANJILVGUIWANSHUIJIECHANWUCHULIBOLIXIANWEIBIAOMIAN,NENGYUSHUZHICHANSHENGHUAXUEJIAN。ZHEISHIRENMENDIYICICONGFENZIDEJIAODUJIESHIBIAOMIANCHULIJIZAIJIEMIANZHONGDEZHUANGTAI。  

硅烷偶联剂由于在分子中具有这两类化学基团,因此既能与无机物中的羟基反应,又能与有机物中的长分子链相互作用起到偶联的功效,其作用机理大致分以下3步:(1)X基水解为羟基;(2)羟基与无机物表面存在的羟基生成氢键或脱水成醚键;(3)R基与有机物相结合。          

3、应用在使用硅烷偶联剂时,为获得较佳的效果,需对每一个特定的应用场合进行试验预选。   

硅烷偶联剂一般要用水和乙醇配成很稀的溶液(质量分数为0.005~0.02)使用,也可单独用水溶解,但要先配成质量分数为0.001的醋酸水溶液,以改善溶解性和促进水解;还可配成非水溶液使用,如配成甲醇、乙醇、丙醇或苯的溶液;也能够直接使用。硅烷偶联剂的用量与其种类和填料表面积有关,即硅烷偶联剂用量(G)=[填料用量(G)×填料表面积(M2/G)]/硅烷最小包覆面积(M2/G)。如果填料表面积不明确,则硅烷偶联剂的加入量可确定为填料量的1%左右。          

颗粒状或粉状填料可用偶联剂溶液浸渍,然后用离心分离机或压滤机将溶液滤去,再将填料加热、干燥、粉碎。如果用来制造补强复合材料或玻璃钢,可用连续法先将玻璃纤维或玻璃布浸渍偶联剂溶液,然后干燥、浸树脂、干燥,再加热层压而成玻璃钢板。以上做法称为表面预处理法,都是先将无机材料或被粘物的表面用偶联剂溶液预处理,然后再与有机树脂接触、压合、粘合、成型,其中阳离子型硅烷偶联剂在兼具降低粘度和起偶联作用方面最有效。          

硅烷偶联剂的应用十分广泛,主要有以下几方面:  

用作表面处理剂,以改善室温固化硅橡胶与金属的粘合性能;    

用于无机填料填充塑料时,可以改善其分散性和粘合性;    

用作增粘剂,在水电站工程中提高水泥与环氧树脂的粘合性;    

用作密封剂,具有耐水、耐高温、耐气候等性能,用于氟橡胶与金属的粘合密封;   

用作单组分硅橡胶的交联剂;    

用作难粘材料聚烯烃(如PE,PP)和特种橡胶(如硅橡胶、EPR、CR、氟橡胶)的粘合促进剂。             

更多化工原料知识请关注兰州三金化工有限责任公司官网!

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