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class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價(jià)格要求：</span>面議</p><p><span>所在地：</span>上海市</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>KEP-350錦湖誠(chéng)信合作,錦湖</p><p><span>***更新：</span>2021-01-13 00:14:12</p><p><span id="click" >瀏覽次數(shù)：2次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="2924amn" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">上海君宜化工銷(xiāo)售中心（有限合伙）</a></p><p><span>聯(lián)系人：</span>蘇剛</p><p><span>郵箱: </span>sg@estrongchem.com</p><p><span>電話(huà): </span>13524989551</p><p><span>傳真: </span>021_60823996 </p><p><span>網(wǎng)址: </span></p><p><span>手機(jī): </span>021-60826029</p><p><span>地址: </span>上海市浦東新區(qū)五星路676弄萬(wàn)科御河10棟</p><p>[當(dāng)前離線(xiàn)] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="ywov7x8" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="lewya7a" class="box"><p><p> 乙丙膠與高不飽和膠種并用一： </p> <p> 在兩種橡膠并用時(shí)影響共硫化的因素有橡膠相的混合性，兩種橡膠的硫化特性及配合劑的分散性，據(jù)知，三元乙丙膠與丁苯膠，KEP-350錦湖誠(chéng)信合作，KEP-350錦湖誠(chéng)信合作、天然橡膠或聚丁二烯膠等并用時(shí)，分散狀態(tài)為微觀不均勻分散，與硫化體系無(wú)關(guān)。但ＮＲ／ＳＢＲ、ＮＲ／聚丁二烯并用體系同ＥＰＤＭ并用體系的摻和狀態(tài)基本上都是相同的。因而分散狀態(tài)并不是一個(gè)太大的問(wèn)題，問(wèn)題在于硫化特性方面，決定因素為橡膠的硫化速度和硫化程度，當(dāng)采用硫化體系時(shí)還決定于雙鍵的數(shù)量、位置和分布，此外，還決定于ＥＰＤＭ第三單體的種類(lèi)。 </p> <p> 當(dāng)三元乙丙膠并用少量不飽和橡膠時(shí)強(qiáng)度比較低，其原因在于兩種橡膠的硫化速度不同，二烯類(lèi)橡膠先行硫化，而ＥＰＤＭ卻還停留在未硫化狀態(tài)，因此，KEP-350錦湖誠(chéng)信合作，為要提高共硫化性，研究一下如何提高ＥＰＤＭ含量大的膠料的強(qiáng)度是有意義的。乙丙橡膠的**主要缺點(diǎn)是硫化速度慢；與其它不飽和橡膠并用難，自粘和互粘性都很差，故加工性能不好。KEP-350錦湖誠(chéng)信合作</p> <span style="display:none;"></span><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="KEP-350錦湖誠(chéng)信合作,錦湖" src="http://tyunfile.71360.com/UpLoadFile/junyi/2019/7/637000840541317795/6370008405413177956391122.JPG"></div><p> 2. EPDM分子結(jié)構(gòu)和特性; </p> <p> 三元乙丙是乙烯、丙烯和非共軛二烯烴的三元共聚物。二烯烴具有特殊的結(jié)構(gòu)，只有兩鍵之一的才能共聚，不飽和的雙鍵主要是作為交鏈處。另一個(gè)不飽和的不會(huì)成為聚合物主鏈，只會(huì)成為邊側(cè)鏈。三元乙丙的主要聚合物鏈?zhǔn)峭耆柡偷?。這個(gè)特性使得三元乙丙可以抵抗熱，光，氧氣，尤其是臭氧。三元乙丙本質(zhì)上是無(wú)極性的，對(duì)極性溶液和化學(xué)物具有抗性，吸水率低，具有良好的絕緣特性。 </p> <p> 主鏈上沒(méi)有雙鍵—耐臭氧耐候性(光，紫外線(xiàn))，優(yōu)異的耐熱氧老化性(可達(dá) 160℃) </p> <p> 天然碳?xì)錁?shù)脂—低溫柔韌性好，優(yōu)異的電性能和耐化學(xué)性能 </p> <p> 低密度高填充—降低膠料成本 </p> <p> 組分范圍寬泛—乙烯含量從低到高，ENB 從 0 到高，分子量范圍寬泛 </p> <p> 在三元乙丙生產(chǎn)過(guò)程中，通過(guò)改變?nèi)龁误w的數(shù)量，乙烯丙烯比，分子量及其分布以及硫化的方法可以調(diào)整其特性。錦湖KUMHO KEP-5770普通牌號(hào)的乙丙橡膠即使不加入耐熱型防老劑，也具有良好的耐高溫性能。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="KEP-350錦湖誠(chéng)信合作,錦湖" src="http://tyunfile.71360.com/UploadFile/junyi/637206627954843750/3081753.jpg"></div><p> 增強(qiáng)改性一： </p> <p> 納米材料增強(qiáng)：用納米技術(shù)能夠在分子水平上重組物質(zhì)結(jié)構(gòu)，從而使新材料具有比傳統(tǒng)材料更優(yōu)越的性能。通過(guò)填充納米填料制備橡膠納米復(fù)合材料（分散相至少有一維的尺寸介于１~１００nｍ）已成為目前研究的新熱點(diǎn)。由于納米粒子具有的小尺寸效應(yīng)、量子效應(yīng)、不飽和價(jià)效應(yīng)和電子隧道效應(yīng)等表面效應(yīng)，因此引入納米填料將使橡膠的性質(zhì)發(fā)生很大改變，并有可能獲得一些新的性能。 </p> <p> 納米材料增強(qiáng)ＥＰＤＭ研究近年十分活躍，主要有納米粘土（層狀硅酸鹽）、納米二氧化硅、納米碳酸鈣、炭黑一白炭黑雙相納米填料、納米氧化鋅、納米氫氧化鎂、納米石墨、納米氧化鋁、納米氮化硅、納米丙烯酸金屬鹽、納米ＰＴＥＥ、碳納米管和納米級(jí)纖維等，使ＥＰＤＭ獲得更優(yōu)異、更***的性能，進(jìn)一步拓寬ＥＰＤＭ使用范圍。 </p><p> EPDM的填充 </p> <p> 三元乙丙膠屬于補(bǔ)強(qiáng)型的橡膠，并在大量填充時(shí)其物理性能的降低很小，當(dāng)用炭黑作為補(bǔ)強(qiáng)材料時(shí)，拉斷強(qiáng)度隨炭黑粒徑的減少而增大，而與炭黑的結(jié)構(gòu)關(guān)系不大，而定伸應(yīng)力、硬度、門(mén)尼粘度等則幾乎只與炭黑的結(jié)構(gòu)相關(guān)，至于撕裂強(qiáng)度，則與炭黑的粒徑和結(jié)構(gòu)兩者均有依賴(lài)關(guān)系，其中以粒徑影響較大。 </p> <p> EＰＤＭ中用的**多的軟化劑是石油系油，它的組成特別復(fù)雜。但對(duì)三元乙丙膠具有相容性，它可以像填充劑那樣可以大量添加，主要的支配因素是油的粘度，從揮發(fā)性、膠料門(mén)尼粘度、拉斷強(qiáng)度、撕裂強(qiáng)度、熱老化后的拉斷強(qiáng)度和抗吸水性來(lái)看，油的粘度高些好，壓縮長(zhǎng)久變形、屈撓龜裂增長(zhǎng)和高溫拉斷強(qiáng)度等不受油的種類(lèi)和型號(hào)所影響，但低溫特性隨油的粘度升高而變差 EPDM用于制作發(fā)動(dòng)機(jī)冷卻系統(tǒng)中的密封圈。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="KEP-350錦湖誠(chéng)信合作,錦湖" src="http://tyunfile.71360.com/UploadFile/junyi/637206627881660156/3435995.jpg"></div><p> 乙丙橡膠化學(xué)改性 </p> <p> 盡管乙丙橡膠具有耐熱、抗老化、抗沖擊彈性和低溫性能良好等優(yōu)點(diǎn)，但存在強(qiáng)度低、自粘性及互粘性差，與其他膠種并用時(shí)，共混相溶性不好等缺點(diǎn)。為了制備綜合性能更優(yōu)異的橡膠，在技術(shù)上常對(duì)乙丙橡膠進(jìn)行極化改性。改性乙丙橡膠主要是將乙丙橡膠進(jìn)行溴化、氯化、磺化、順酐化、馬來(lái)酸酐化等。乙丙橡膠還通過(guò)接枝方法進(jìn)行改性，以解決乙丙橡膠的分子主鏈為非極性飽和結(jié)構(gòu)存在的強(qiáng)度低、自粘性及互粘性差、本身著色、印刷、電鍍困難、與其它膠種共混并用時(shí)相容性差等性能缺點(diǎn)，從而拓展了乙丙橡膠在許多方面的應(yīng)用。 EPDM與硅橡膠有一定的相容性，用EPDM改性后的硅橡膠性能明顯提高可應(yīng)用于許多領(lǐng)域。KEP-282F錦湖歡迎咨詢(xún)</p><p style="text-indent:25px">三元乙丙的交鏈速度和硫化時(shí)間隨著硫化類(lèi)型和含量而改變。KEP-350錦湖誠(chéng)信合作</p><p style="text-indent:25px">近年來(lái)，隨著現(xiàn)代新型橡塑的不斷發(fā)展，人們節(jié)能環(huán)保意識(shí)增強(qiáng)，注塑模具加工工業(yè)也隨著變化。在此基礎(chǔ)上，發(fā)展出了各種新興的注射成型技術(shù)。但從整體來(lái)看我國(guó)與國(guó)外塑料模具的優(yōu)先水平相比，依然存在不小的差距。由于國(guó)際化工巨頭接連遭受不可抗力、摩擦，國(guó)內(nèi)環(huán)保趨嚴(yán)、廢塑料進(jìn)口禁止，導(dǎo)致原材料成本大幅上升，出口放緩，同時(shí)受“限塑”新政出臺(tái)、家電/汽車(chē)行業(yè)產(chǎn)銷(xiāo)增速下滑等因素影響，國(guó)化工原料及產(chǎn)品，橡膠，炭黑，色母粒，彈性體行業(yè)生產(chǎn)環(huán)境難以樂(lè)觀。目前，有限責(zé)任公司制造企業(yè)在整個(gè)模具行業(yè)中所占比例高達(dá)30%，塑料模具加工技術(shù)的革新對(duì)于模具行業(yè)具有重要的意義。塑料制品應(yīng)用范圍的擴(kuò)展，對(duì)于產(chǎn)品質(zhì)量、形態(tài)、數(shù)量的要求也在不斷增加。在市場(chǎng)需求結(jié)構(gòu)和宏觀經(jīng)濟(jì)環(huán)境都發(fā)生顯著變化的大背景下，行業(yè)中不少企業(yè)不斷創(chuàng)新和嶄新面貌進(jìn)入新的發(fā)展階段，生產(chǎn)更符合市場(chǎng)需求的產(chǎn)品。KEP-350錦湖誠(chéng)信合作</p><p 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