錦湖EPDM KEP-2371 值得信賴上海君宜化工供應(yīng)-b2b網(wǎng)站_b2b電子商務(wù)平臺(tái)【買產(chǎn)品】-上?？谄蚴称酚邢薰?/title><meta name="description" content="2.分子量對(duì)三元乙丙膠性能的影響：三元乙丙橡膠的分子量及分布可以通過凝膠滲透色譜法使用二氯苯作為溶劑在高溫下（150℃）測(cè)量而得。分子量分布通常被稱為是重量平均分子量與數(shù)量平均分子量的比例。根據(jù)普通和高度支化的結(jié)構(gòu)，這個(gè)值通常在2到5之間變"><meta name="keywords" content="錦湖EPDM KEP-2371,錦湖"><link rel="canonical" href="http://www.cdcfah.com/"/><meta name="applicable-device" content="pc"><link rel="shortcut icon" href="/static/new_net_01/images/favicon.ico"><link rel="stylesheet" href="/static/new_net_01/css/slick.css" /><link rel="stylesheet" href="/static/new_net_01/css/addnew.css"><link rel="stylesheet" href="/static/new_net_01/css/sidenav.css"><link rel="stylesheet" href="/static/new_net_01/css/style.css" /><link rel="stylesheet" href="/static/new_net_01/css/tab.css"><link rel="stylesheet" href="/static/new_net_01/css/404.css"> <meta name="baidu-site-verification" content="OBVzrC9aaQ" /> <meta http-equiv="Cache-Control" content="no-transform" 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值得信賴上海君宜化工供應(yīng)</h1><div id="foqxe8n" class="proBig"><div id="yhdk7fm" class="bigimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UpLoadFile/junyi/2019/7/637000841200332223/6370008412003322234729732.JPG" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="ei8wim8" class="smallimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UpLoadFile/junyi/2019/7/637000841200332223/6370008412003322234729732.JPG" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="q2zopr3" 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>錦湖EPDM KEP-2371,錦湖</p><p><span>***更新：</span>2020-12-13 03:02:41</p><p><span id="click" >瀏覽次數(shù)：0次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="3xzwyp3" 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: </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弄萬科御河10棟</p><p>[當(dāng)前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="cahdpq8" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="33dpg88" class="box"><p><p> 2. 分子量對(duì)三元乙丙膠性能的影響： </p> <p> 三元乙丙橡膠的分子量及分布可以通過凝膠滲透色譜法使用二氯苯作為溶劑在高溫下（150℃）測(cè)量而得。分子量分布通常被稱為是重量平均分子量與數(shù)量平均分子量的比例。根據(jù)普通和高度支化的結(jié)構(gòu)，這個(gè)值通常在2到5之間變化。三元乙丙橡膠的門尼粘度可以反映其分子量的大小，三元乙丙橡膠的門尼粘度范圍通常在20到100之間。 </p> <p> 增加三元乙丙橡膠的分子量，正面影響有：更高的拉伸和撕裂強(qiáng)度，在高溫情況下更高的生坯強(qiáng)度，能夠吸收更多的油和填料（低成本），錦湖EPDM KEP-2371。但是過高的分子量也會(huì)使得橡膠的流動(dòng)性能變差，這意味橡膠后續(xù)加工會(huì)更加的困難，比如更難混煉，更難充模，更難擠出等等，隨著分子量分布的增加，正面的影響有：增加的混煉和碾磨加工性。但是，較窄的分子量分布可以改進(jìn)硫化速度，錦湖EPDM KEP-2371，錦湖EPDM KEP-2371，硫化狀態(tài)以及注塑行為。三元乙丙橡膠制品在120℃下可長(zhǎng)期使用，在150～200℃下可短暫或間歇使用。錦湖EPDM KEP-2371</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="錦湖EPDM KEP-2371,錦湖" src="http://tyunfile.71360.com/UpLoadFile/junyi/2019/7/637000841200332223/6370008412003322234729732.JPG"></div><p> 8. EPDM的塑煉與混煉 </p> <p> 塑煉?：EPDM的塑煉效果差，不象天然橡膠和丁苯橡膠那么易于塑煉。門尼粘度高的三元乙丙橡膠塑煉時(shí)，由于分子鏈斷裂，門尼粘度有所下降。低門尼枯度的乙丙橡膠，只是在塑煉初期門尼粘度稍有下降。因此三元乙丙橡膠不象天然橡膠那樣需要專門進(jìn)行塑拉，只是在混煉前先將三元乙丙橡膠在低溫下稍薄通即可。 </p> <p> 混煉? ：EPDM可采用開煉機(jī)和密煉機(jī)混煉。但用密煉機(jī)混煉填充劑分散效果更好。 </p> <p> 開煉機(jī)混煉 </p> <p> 由于三元乙丙橡膠塑煉效果差，缺乏粘著性，不易“ 吃” 炭黑，不宜包輥。故用開煉機(jī)混煉時(shí)應(yīng)注意以下幾點(diǎn)： </p> <p> 1 ）門尼粘度低的可以用開煉機(jī)混煉，門尼粘度高的用開煉機(jī)混煉比較困難； </p> <p> 2）混煉開始時(shí)采用窄輥尾，先將生膠薄通 1 0 次左右，使其形成連續(xù)的包輥膠后再放寬輥距進(jìn)行加料混煉； </p> <p> 3）輥溫應(yīng)控制在 60℃左右，前輥溫度稍低于后輥； </p> <p> 4）混煉高填充油和高填充劑的膠料時(shí)，可將油和填充劑先混合后再加到膠料 </p> <p> 中去，以改善混煉操作。 </p> <p> 密煉機(jī)混煉 </p> <p> EPDM 密煉機(jī)混煉應(yīng)注意以下幾點(diǎn)： </p> <p> 1 ）容量應(yīng)比正常容量高 15%左右； </p> <p> 2）溫度要高些，以利于乙丙橡膠在高溫下塑化，從而使配合劑易于分散均勻； </p> <p> 3）填充劑用量高的膠料宜采用逆混法，填充劑用量低的膠料用一般混煉法較好。錦湖EPDM KEP-2371三元乙丙可以利用有機(jī)過氧化物或者硫來進(jìn)行硫化。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="錦湖EPDM KEP-2371,錦湖" src="http://tyunfile.71360.com/UploadFile/junyi/637206627878330078/1479859.jpg"></div><p> EPDM共混改性一： </p> <p> ＥＰＤＭ的硫化速度較慢，耐油性及粘合性較差，若使其與橡膠如天然橡膠（ＮＲ）、丁腈橡膠（ＮＢＲ）、丁基橡膠（ＩＩＲ）、甲基乙烯基硅橡膠（ＶＭＱ）、氯磺化聚乙烯（ＣＳＭ）、氯丁橡膠（ｃＲ）、氯化聚乙烯（ＣＰＥ）等并用改性，可以很好地綜合不同種類橡膠的優(yōu)異性能，改善各自的不足。一方面，ＥＰＤＭ可以改善其他膠種的耐熱性、耐低溫性、耐臭氧及耐水蒸氣性能等；另一方面，又會(huì)使ＥＰＤＭ本身的加工性、耐油性和粘合性得到提高。因此，ＥＰＤＭ與其他橡膠共混改性，可制造出許多具有優(yōu)異性能的新材料。ＥＰＤＭ具有飽和主鏈和低不飽和側(cè)鏈，與塑料和其他橡膠共混、動(dòng)態(tài)硫化改性，可制造多種性能優(yōu)異的新型材料。典型共混物是與聚丙烯（ＰＰ）共混動(dòng)態(tài)硫化改性制成全硫化ＴＰＶ。 </p><p> EPDM在發(fā)動(dòng)機(jī)冷卻系統(tǒng)和空調(diào)制冷系統(tǒng)密封件中的應(yīng)用 </p> <p> EPDM用于制作發(fā)動(dòng)機(jī)冷卻系統(tǒng)中的密封圈。此類產(chǎn)品接觸的介質(zhì)是防凍液、陽光、水、臭氧，使用溫度在-40℃～125℃，短期耐熱溫度可達(dá)135℃。此類零件采用的EPDM，硬度（邵氏A）為60～80（制冷系統(tǒng)中應(yīng)用的圓密封圈為75）；其拉伸強(qiáng)度應(yīng)在10.5MPa以上；斷裂伸長(zhǎng)率一般在175%以上；在伸長(zhǎng)率50%下的定伸應(yīng)力為1～2MPa；在伸長(zhǎng)率**下的定伸應(yīng)力為2～5MPa以上；壓縮變形（150℃，22h）應(yīng)小于20%；其玻璃化轉(zhuǎn)變溫度（TR）比較大為-50℃；耐臭氧老化（50pphm,拉伸20%，72h）應(yīng)無裂紋；對(duì)于發(fā)動(dòng)機(jī)冷卻系統(tǒng)中應(yīng)用的密封件應(yīng)進(jìn)行冷卻液試驗(yàn)（將試樣放于防凍液中，150℃，166h，試驗(yàn)壓力約0.4MPa），其硬度變化應(yīng)為±5，拉伸強(qiáng)度變化應(yīng)為±20%，斷裂伸長(zhǎng)率變化應(yīng)為-15%～20%，體積改變應(yīng)在±5%；對(duì)于空調(diào)系統(tǒng)中應(yīng)用的密封件，應(yīng)進(jìn)行制冷劑試驗(yàn)（將試樣放于PAG、ND8制冷劑中，100℃，70h）其硬度變化**多為±5，拉伸強(qiáng)度變化**多為±20%，斷裂伸長(zhǎng)率變化**多為-15%～20%，體積改變應(yīng)在±5%之內(nèi)；熱老化試驗(yàn)（150℃，70h），其硬度變化應(yīng)為±5，拉伸強(qiáng)度下降應(yīng)小于10%，伸長(zhǎng)率的下降不能超過10%。乙丙橡膠有優(yōu)異的耐水蒸氣性能并優(yōu)于其耐熱性。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="錦湖EPDM KEP-2371,錦湖" src="http://tyunfile.71360.com/UpLoadFile/junyi/2019/8/637025996879738409/6370259968797384098428077.jpg"></div><p> . 乙烯丙烯比 </p> <p> 乙烯丙烯比可以在硫化階段進(jìn)行改變，商業(yè)的三元乙丙聚合物乙烯丙烯比由80/20到50/50。當(dāng)乙烯丙烯比由50/50變化到80/20時(shí)，正面的影響有：更高的壓坯強(qiáng)度，更高的拉伸強(qiáng)度，更高的結(jié)晶化，更低的玻璃體轉(zhuǎn)化溫度，能將原材料聚合物轉(zhuǎn)化成丸狀，以及更好的擠出特性。不好的影響就是不好的壓延混合性，較差的低溫特性，以及不好的壓縮形變。 </p> <p> <p> . 乙烯丙烯比 </p> <p> 乙烯丙烯比可以在硫化階段進(jìn)行改變，商業(yè)的三元乙丙聚合物乙烯丙烯比由80/20到50/50。當(dāng)乙烯丙烯比由50/50變化到80/20時(shí)，正面的影響有：更高的壓坯強(qiáng)度，更高的拉伸強(qiáng)度，更高的結(jié)晶化，更低的玻璃體轉(zhuǎn)化溫度，能將原材料聚合物轉(zhuǎn)化成丸狀，以及更好的擠出特性。不好的影響就是不好的壓延混合性，較差的低溫特性，以及不好的壓縮形變。 </p> 三元乙丙是乙烯、丙烯和非共軛二烯烴的三元共聚物。KEP-4640E錦湖質(zhì)量保證</p><p style="text-indent:25px">EPDM與NBR分子極性差別很大，相容性很差，共混時(shí)需要添加相容劑提高二者的相容性。錦湖EPDM KEP-2371</p><p> 8.輪胎用EPDM選擇胎側(cè)：輪胎胎側(cè)是輪胎側(cè)向變形比較大的部位,又與大氣直接接觸,要求膠料的耐屈撓性能、耐臭氧性能和耐天候老化性能良好。在胎側(cè)膠配方中添加少量防護(hù)蠟可對(duì)輪胎胎側(cè)起靜態(tài)防護(hù)作用,但在動(dòng)態(tài)條件下防護(hù)作用**減弱,輪胎在使用一段時(shí)間后胎側(cè)仍會(huì)出現(xiàn)大量龜裂。EPDM具有突出的耐臭氧性能、耐天候性能和耐熱性能，并用少量的EPDM可以***提高胎側(cè)的耐臭氧、耐候性能和耐裂口增長(zhǎng)性能。推薦牌號(hào)：錦湖KEP5560推薦理由：窄分子量分布，超高的ENB含量，硫化速度快，用于輪胎制品時(shí)能夠很好的與NR、SBR等二烯類橡膠共混，保證良好的物理性能內(nèi)胎：因具有良好的氣密性能和耐熱性能而在輪胎內(nèi)胎中得到廣泛應(yīng)用"但其加工性能較差存在膠料收縮大&滯后生熱大和加油后易粘輥等問題并且老化時(shí)分子鏈傾向于斷裂導(dǎo)致使用后期膠料發(fā)粘嚴(yán)重時(shí)造成內(nèi)外胎粘在一起。錦湖EPDM KEP-2371</p><p style="text-indent:25px">上海君宜化工銷售中心（有限合伙）致力于橡塑，是一家貿(mào)易型公司。上海君宜化工致力于為客戶提供良好的化工原料及產(chǎn)品，橡膠，炭黑，色母粒，彈性體，一切以用戶需求為中心，深受廣大客戶的歡迎。公司注重以質(zhì)量為中心，以服務(wù)為理念，秉持誠(chéng)信為本的理念，打造橡塑良好品牌。在社會(huì)各界的鼎力支持下，持續(xù)創(chuàng)新，不斷鑄造***服務(wù)體驗(yàn)，為客戶成功提供堅(jiān)實(shí)有力的支持。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/2380085.html</p></div></div></div></div></div><div id="8o349d7" class="page-right twoColRt"><div id="8mawyk9" class="box01 margin10 clearfix"><h3><a 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