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<meta http-equiv="Cache-Control" content="no-siteapp" /> <script>var V_PATH="/";window.onerror=function(){ return true; };</script> </head><body> <h1><a href="http://www.cdcfah.com/">六月丁香婷婷亚洲中文字幕,欧美精品高清一区二区蜜芽,尤物92午夜福利视频,精品视频一区二区三区在线观看</a></h1> <div style="position:fixed;left:-9000px;top:-9000px;"><object id="qgqbi"></object><delect id="qgqbi"><sub id="qgqbi"><dl id="qgqbi"></dl></sub></delect><track id="qgqbi"></track><tr id="qgqbi"></tr><video id="qgqbi"></video><xmp id="qgqbi"><span id="qgqbi"></span></xmp><span id="qgqbi"></span><strong id="qgqbi"><em id="qgqbi"><sup id="qgqbi"><progress id="qgqbi"></progress></sup></em></strong><dl id="qgqbi"><small id="qgqbi"></small></dl><wbr id="qgqbi"></wbr><noscript id="qgqbi"></noscript><tr id="qgqbi"></tr><track id="qgqbi"><dl id="qgqbi"></dl></track><label id="qgqbi"><em id="qgqbi"></em></label><tbody id="qgqbi"></tbody><blockquote id="qgqbi"></blockquote><dfn id="qgqbi"><center id="qgqbi"></center></dfn><sub id="qgqbi"></sub><u 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id="suwii"></object></div><header class="header container"><span id="qec0eee" class="logo"><a href="http://www.cdcfah.com/"><img src="/static/new_net_01/images/logo.png" alt="找產(chǎn)品網(wǎng)"></a></span><span id="geu02co" class="tigs"> 發(fā)信息做推廣就找產(chǎn)品網(wǎng)<br />企業(yè)電商信息綜合服務平臺 </span><div id="acsykci" class="searchbox"><div id="ymioyeo" class="searchLt"><div id="2wagu4u" class="tabs"><a href="JavaScript:;" data-type="product" class="active">產(chǎn)品</a><a href="JavaScript:;" data-type="member" class="">公司</a><a href="JavaScript:;" data-type="article" class="">資訊</a><a href="JavaScript:;" data-type="exhibition" class="">展會</a></div><div id="usw2wae" class="clearfix searchWrap"><div id="syeqk0o" class="searchInput"><input type="text" name="keywords" placeholder="請輸入搜索關鍵詞" id="kd"><a href="javascript:void(0)" class="searchBtn" id="search">搜索</a></div></div></div></div></header><nav class="navbox"><div id="k2gswae" class="container"><ul><li id = "index_index"><a 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href="http://www.cdcfah.com/cp/third-gyhwzx_qtgyhw/">其他過氧化物</a>?南寧質(zhì)量固化劑廠家批發(fā)價歡迎咨詢江陰泉林化學品供應</p><div id="gy2aag2" class="leftbox clearfix"><h1>南寧質(zhì)量固化劑廠家批發(fā)價歡迎咨詢江陰泉林化學品供應</h1><div id="kkokosm" class="proBig"><div id="ya4sei2" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/Jyquanlin/637286280330771484/890705.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="2uimiuq" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/Jyquanlin/637286280330771484/890705.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="yyu24qm" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價格要求：</span>面議</p><p><span>所在地：</span>江蘇省</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關鍵詞：</span>南寧質(zhì)量固化劑廠家批發(fā)價,固化劑</p><p><span>***更新：</span>2020-07-27 05:13:40</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="mw222uw" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">江陰泉林化學品有限公司</a></p><p><span>聯(lián)系人：</span>葉奇</p><p><span>郵箱: </span>63173667@QQ.COM</p><p><span>電話: </span>13861290603</p><p><span>傳真: </span>0510_</p><p><span>網(wǎng)址: </span></p><p><span>手機: </span>0510-86658688</p><p><span>地址: </span>常澄路1號16樓1617-1620</p><p>[當前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="w4ogcyk" class="page-proshow02"><p class="title">詳細說明</p><div id="oam2kgs" class="box"><p><p> 樹脂中阻聚劑等其它添加劑的影響 </p> <p> 在保存未固化的液體 UPR 時，要加入阻聚劑，使 UPR 商品在貯存過程中免于過早膠凝變質(zhì)。引發(fā)劑和促進劑反應釋放出的游離基，一開始是被阻聚劑消耗掉，南寧質(zhì)量固化劑廠家批發(fā)價，阻聚劑變?yōu)榉€(wěn)定的大分子失去阻聚能力。因此，低反應活性的樹脂有可能因為其中加入的阻聚劑量很少而顯得反應活性很高，而高反應活性的樹脂也可能因其中加入了較大量的阻聚劑變得不甚活潑。另外樹脂中的填料、色漿，南寧質(zhì)量固化劑廠家批發(fā)價、低收縮添加劑等也會影響樹脂的固化程度。低溫或高濕度的不利的固化條件下，南寧質(zhì)量固化劑廠家批發(fā)價，可采用復合固化系統(tǒng) 過氧化甲乙酮 1% N，N-二甲基苯胺 0.5% 過氧化苯甲酰 2%。南寧質(zhì)量固化劑廠家批發(fā)價</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="南寧質(zhì)量固化劑廠家批發(fā)價,固化劑" src="https://tyunfile.71360.com/WaterMark/UploadFile/Jyquanlin/637286280330771484/890705.png"></div><p> 當然也會有其他導致樹脂變黃的原因?？偟膩碚f熱氧和紫外線是黃變的主要原因。采用飽和二元酸(或酸酐)代替芳香族二元酸(或酸酐)，雖然可以在一定程度上使樹脂顏色淺一點，但考慮到樹脂性能、成本等各方面的因素，所以此法也是不夠理想的。 </p> <p> 據(jù)**介紹，除了在生產(chǎn)、儲存過程中充惰性氣體盡可能隔絕與氧氣的接觸外，更有效的方法是添加抗氧劑與紫外線吸收劑，可有效地防止與延遲聚酯發(fā)生黃變。推薦的不飽和樹脂抗黃變解決方案是：選用不含胺類的抗氧劑，而采用主輔抗氧劑復配使用，主抗氧劑通常為受阻酚類，可以捕捉過氧化自由基；輔助抗氧劑則為亞磷酸酯類，在分解氫過氧化物的同時還能螯合金屬離子，防止樹脂氧化變色。如果想進一步提高耐黃變、耐候性，建議再添加紫外線吸收劑進去，添加紫外線吸收劑能有效***高分子材料，在紫外線作用下的黃變現(xiàn)象，且給產(chǎn)品提供優(yōu)異的保護作用，有效防止光澤的降低、裂紋、氣泡、脫層的產(chǎn)生，明顯提高產(chǎn)品的耐候性，與抗氧劑一起使用有很好的協(xié)同效應。當然抗氧劑與紫外線吸收劑的使用，并不能從根本上解決黃變問題，但是在一定的范圍內(nèi)，還是能有效地防止不飽和聚酯產(chǎn)品氧化黃變，保持產(chǎn)品水色透明，提高產(chǎn)品的檔次。南寧質(zhì)量固化劑廠家批發(fā)價如施工單位無熱處理條件，可在施工后常溫養(yǎng)護 1 個月。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="南寧質(zhì)量固化劑廠家批發(fā)價,固化劑" src="https://tyunfile.71360.com/WaterMark/UploadFile/Jyquanlin/637281088415224610/3058979.png"></div><p> 桐油酸酐 308 液體每100份標準樹脂用100-200份 </p> <p> 甲基六氫鄰苯二甲酸酐 MHHPA液體每100份標準樹脂用70-80份固化：80℃4小時+120℃4小時 </p> <p> 乙二醇雙偏苯三酸酐酯 TME 粘度:102cps 每100份標準樹脂用56份固化：150℃1小時+180℃4小時，使用期3-4天。 </p> <p> 鄰苯二甲酸酐 PA HT901EPA DQ19121 白色粉末熔點128℃每100份標準樹脂用30-40份固化：100-200℃12-6小時，使用期長。熱變形溫度110-152℃ 抗彎強度1120Kg/cm2 抗壓強度1550Kg/cm2 抗拉強度830Kg/cm2 伸長率4.8% 沖擊強度2.5Kg-cm/cm2 洛氏硬度100 介電常數(shù)（50Hz23℃）3.64 功率因數(shù)（50Hz23℃）0.007 </p> <p> 偏苯三酸酐 TMA 白色粉末熔點168℃每100份標準樹脂用30-35份固化：150℃1小時+180℃4小時。 </p><p> 不飽和聚酯樹脂（UPR）的固化似乎是從理論和實踐上已研究得十分透徹的問題，但是因為影響固化反應的因素相當復雜，而在UPR的各種應用領域中，制品所出現(xiàn)的質(zhì)量瑕疵在很大程度上幾乎都與“固化”有關。所以，我們有對 UPR 的固化進行較深入探討的必要。（探討不飽和聚酯樹脂的固化，首先應該了解與不飽和聚酯樹脂固化有關的一些概念和定義） </p> <p> 與不飽和聚酯樹脂固化有關的概念和定義 </p> <p> 1 固化的定義 </p> <p> 液態(tài) UPR 在光、熱或引發(fā)劑的作用下可以通過線型聚酯鏈中的不飽和雙鍵與交聯(lián)單體的雙鍵的結合，形成三向交聯(lián)的不溶不熔的體型結構。這個過程稱為 UPR 的固化。 </p> <p> 2固化劑 </p> <p> 不飽和聚酯樹脂的固化是游離基引發(fā)的共聚合反應，如何能使反應啟動是問題的關鍵。單體一旦被引發(fā)，產(chǎn)生游離基，分子鏈即可以迅速增長而形成三向交聯(lián)的大分子。 </p> <p> 不飽和聚酯樹脂固化的啟動是首先使不飽和 C—C 雙鍵斷裂，由于化學鍵發(fā)生斷裂所需的能量不同，對于 C—C 鍵，其鍵能 E=350kJ/mol，需 350-550℃的溫度才能將其激發(fā)裂解。 </p> <p> <br /> </p> <p> <br /> </p> <p> <br /> 連鎖交聯(lián)反應不易進行， **終導致長久的欠固化。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="南寧質(zhì)量固化劑廠家批發(fā)價,固化劑" src="https://tyunfile.71360.com/WaterMark/UploadFile/Jyquanlin/637286280878593750/9329214.png"></div><p> 多乙烯多胺 PEPA H2NC2H4（NHC2H4）nNH2 淺黃色液體每100份標準樹脂用14-15份性能：毒性較小，揮發(fā)性低、適用期較長、價廉。 </p> <p> 二丙烯三胺 DPTA H2N（CH2）3 NH（CH2）3NH2 分子量131 活潑氫當量26 淺黃色液體每100份標準樹脂用12-15份性能同TETA。 </p> <p> 二甲胺基丙胺 DMAPA （CH3）2N （CH2）3NH2 低粘度透明液體每100份標準樹脂用4-7份毒性較大，具有固化和催化兩個反應，粘附性能良好，柔性也好，適用期長。 </p> <p> 二乙胺基丙胺 DEAPA （C2H5）2N （CH2）3NH2 分子量130 活潑氫當量65 低粘度透明液體每100份標準樹脂用4-8份固化：60-70℃4小時。性能：適用期50克25℃4小時，熱變形溫78-94℃，抗壓強度920-1050kg/cm2，抗拉強度480-640kg/cm2，沖擊強度 0.2尺-磅/寸洛氏硬度90-98。介電常數(shù)（50赫、23℃）3.75 功率因數(shù)（50赫、23℃）0.007 中溫固化、低溫性能好 </p> <p> <br /> </p> <p> <br /> 制品體積小，要適當增加固化劑、促進劑的加入量。南寧質(zhì)量固化劑廠家批發(fā)價</p><p style="text-indent:25px">凝膠階段（A 階段）：從加入固化劑、促進劑以后算起，直到樹脂凝結成膠凍狀而失去流動性的階段。南寧質(zhì)量固化劑廠家批發(fā)價</p><p> FRP 產(chǎn)品在實際施工中，由于不同廠家不同批次的樹脂固化速度不同，同時施工時受環(huán)境溫度、濕度等諸多因素的影響，制品達比較好固化程度的時間會有所不同。下面介紹幾種間接判斷 FPR 產(chǎn)品固化程度的常用方法。 </p> <p> 現(xiàn)場檢查 </p> <p> 用手觸 FRP 產(chǎn)品表面無粘感；用干凈棉球蘸取**放在制品表面觀察，棉花是否出現(xiàn)顏色；敲擊制品聽聲音，應清脆而不是模糊；用硬幣劃不出傷痕。 </p> <p> 巴氏硬度法 </p> <p> 巴氏硬度法是用 Barcol 硬度儀測試成型材料的硬度值。一般巴氏硬度達 40～50，則達到較為理想的固化程度，即可投入使用了。南寧質(zhì)量固化劑廠家批發(fā)價</p><p style="text-indent:25px">江陰泉林化學品有限公司始建于2019-03-01，坐落于常澄路1號16樓1617-1620，現(xiàn)有員工5~10人余人。專業(yè)的團隊大多數(shù)員工都有多年工作經(jīng)驗，熟悉行業(yè)專業(yè)知識技能，致力于發(fā)展泉林的品牌。公司堅持以客戶為中心、不飽和樹脂，乙烯基樹脂，環(huán)氧樹脂，玻纖纖維紗，玻纖纖維布，促進劑，固化劑，脫模劑，脫模蠟，玻璃纖維氈，環(huán)氧固化劑，環(huán)氧樹脂色漿，樹脂色漿，樹脂膠衣，高溫固化劑，粒子引發(fā)劑，DTBP，以及樹脂配套類產(chǎn)品。市場為導向，重信譽，保質(zhì)量，想客戶之所想，急用戶之所急，全力以赴滿足客戶的一切需要。江陰泉林化學品有限公司主營業(yè)務涵蓋[ "不飽和聚酯樹脂不飽和樹脂", "乙烯基樹脂，樹脂，膠衣", "玻璃纖維紗，玻璃纖維布", "固化劑促進劑，環(huán)氧固化劑" ]，堅持“質(zhì)量***、質(zhì)量服務、顧客滿意”的質(zhì)量方針，贏得廣大客戶的支持和信賴。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/714773.html</p></div></div></div></div></div><div id="oy2oc22" class="page-right twoColRt"><div id="mye4u4w" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="2yuyeiw" class="recomPic likePro"><a 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