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.結(jié)果發(fā)現(xiàn) ,阻燃劑含量的增加有利于提高膠體的膨化性能和改善玻璃框架中背火面玻璃的抗碎裂性能 ,但過量的阻燃劑則會對膠體的耐火時間產(chǎn)生不利影響 . </div> <p><span>發(fā)布時間：</span>2020-01-05</p> <p><span>瀏覽次數(shù)：</span>848</p> <div id="zp5t555" class="product_btn"> <a href="/order.html" class="probtn1" rel="nofollow">在線詢價</a> <a href="/contact.html" class="probtn2" rel="nofollow">聯(lián)系我們</a> </div> </div> </div> <div id="rfpxj5b" class="pro_list"> <div id="lnv5phj" class="pro_con"> <div id="ftn5rrh" class="pro_gs"> <div id="tfztnpd" class="gs_tit"><h3>產(chǎn)品概述</h3></div> <div id="nrnvdpr" class="gs_text"> <p><strong>pam聚丙烯酰胺工廠價格</strong></p><p>阻燃劑對聚丙烯酰胺膠體防火性能的影響<br />研究了膨脹型阻燃劑對聚丙烯酰胺膠體的炭化和膨化性能的影響 ,以及阻燃劑含量對膠體防火性能的影響 .結(jié)果發(fā)現(xiàn) ,阻燃劑含量的增加有利于提高膠體的膨化性能和改善玻璃框架中背火面玻璃的抗碎裂性能 ,但過量的阻燃劑則會對膠體的耐火時間產(chǎn)生不利影響 .</p><p>丙烯酰胺+水（引發(fā)劑/聚合）→聚丙烯酰胺膠塊→造粒→干燥→粉碎→聚丙烯酰胺產(chǎn)品<br />我國聚丙烯酰胺生產(chǎn)技術(shù)大概也經(jīng)歷了3個階段:<br />第階段是zui早采用盤式聚合，即將混合好的聚合反應(yīng)液放在不銹鋼盤中，再將這些不銹鋼盤推至保溫烘房中，聚合數(shù)小時后，從烘房中推出，用鍘刀把聚丙烯酰胺切成條狀，進絞肉機造粒，烘房干燥，粉碎制得成品。這種工藝*是手工作坊式。<br />第二階段是采用捏合機，即將混合好的聚合反應(yīng)液放在捏合機中加熱，聚合開始后，開始捏合機，一邊聚合一邊捏合，聚合完后，造粒也基本完成，倒出物料經(jīng)干燥、粉碎得成品。<br />第三階段是，20世紀80年代后期，開發(fā)了錐形釜聚合工藝，由核工業(yè)部五所在江蘇江都化工廠試車成功。該工藝在錐形釜下部帶有造料旋轉(zhuǎn)刀，聚合物在壓出的同時，即成粒狀，經(jīng)轉(zhuǎn)鼓干燥機干燥，粉碎得產(chǎn)品。<br />為了避免聚丙烯酰胺膠塊黏附在聚合釜釜壁上，有的技術(shù)采用氟或硅的高分子化合物涂覆在聚合釜的內(nèi)壁上，但此涂覆層在上產(chǎn)過程中易脫落而污染聚丙烯酰胺產(chǎn)品。<br />也有可旋轉(zhuǎn)的錐形釜，聚合反應(yīng)完成后，聚合釜倒轉(zhuǎn)將聚丙烯酰胺膠塊倒出）、造粒方式（有機械造粒、切割造粒，也有濕式造粒即分散液中造粒）、干燥方式（有采用穿流回轉(zhuǎn)干燥，也有用振動流化床干燥）及粉碎方式。這些不同中有些是設(shè)備質(zhì)量上有差異，有些是采用的具體方式上的油差異，但總的來看，聚合技術(shù)趨向于固定錐形釜聚合，振動流化床干燥技術(shù)。<br />聚丙烯酰胺生產(chǎn)技術(shù)除了上述的單元操作外，在工藝配方上還有較明顯的差別，引發(fā)就有前加堿共水解工藝和后加堿后水解工藝之分，兩種方法各有利弊，前加堿共水解工藝過程簡單，但存在水解傳熱易產(chǎn)生交聯(lián)和相對分子質(zhì)量損失大的問題，后加堿后水解雖然工藝過程增加了，但水解均勻不易產(chǎn)生交聯(lián)，對產(chǎn)品相對分子質(zhì)量損失也不大。</p><p><strong>pam聚丙烯酰胺工廠價格</strong><br />目前我國聚丙烯酰胺聚合用的引發(fā)劑有無機引發(fā)劑、有機引發(fā)劑和無機—有機混合體系3中類型。<br />（1）過氧化物<br />過氧化物大致分為無機過氧化物和有機過氧化物。無機過氧化物如過流酸鉀，過硫酸銨、過溴酸鈉和過氧化氫等。有機過氧化物如過氧化苯甲酰、過氧化月桂酰和叔丁羥基過氧化物等。它們配用的還原劑有硫酸亞鐵、氯化亞鐵、偏亞硫酸鈉和硫代硫酸鈉等。<br />（2）偶氮化合物類<br />如偶雙二甲基戊腈、偶氮雙氰基戊酸鈉和20世紀80年代開發(fā)的偶氮脒鹽系列，如偶氮N-取代脒丙烷鹽酸鹽是一類競相開發(fā)的產(chǎn)品，它們的加入濃度為萬分之0.005-1，催化效率很高，有助于生產(chǎn)相對分子質(zhì)量高的產(chǎn)品，且溶于水，便于使用。<br />反相懸浮聚合法<br />聚丙烯酰胺是目前工業(yè)上zui重要的有機高分子絮凝劑之一，在工業(yè)上通常采用水溶液法，反向懸浮聚合法來生產(chǎn)聚丙烯酰胺。下面來介紹一下反向懸浮聚合法生產(chǎn)聚丙烯酰胺的工藝。<br />反向懸浮聚合法是制作聚丙烯酰胺（PAM）微球的如今使用zui廣泛、技術(shù)相對成熟的方法。采用強烈攪拌將單體或單體混合物分散在介質(zhì)（介質(zhì)為有機溶劑）中，成為細小顆粒再進行單體、引發(fā)劑、有機溶劑和分散穩(wěn)定劑的聚合。當聚合完成后，經(jīng)過沸脫水、分離、干燥可以得到微粒狀產(chǎn)品。反向懸浮聚合法得到的產(chǎn)品，固體質(zhì)量分數(shù)>90%，聚合率>95%，單體殘留量<0.5%，產(chǎn)品粒徑在10-500委靡之間，產(chǎn)品的水溶性良好。<br />該方法因為工藝簡單，操作控制方便，聚合熱易于去除，聚合物易于分離、洗滌、干燥，產(chǎn)品純凈、均勻、穩(wěn)定，容易實現(xiàn)工業(yè)化。但是反向懸浮聚合法在工業(yè)生產(chǎn)中也存在著問題，首先受攪拌轉(zhuǎn)速的影響很大，容易聚結(jié)，發(fā)生凝膠，共沸時體系不穩(wěn)定，出水時間長等缺點。還有出品粒徑分布較寬，大量的有機溶劑使用，生產(chǎn)操作的安全，聚合成本太高等系列原因?qū)е路聪驊腋【酆戏ㄔ诤苌僭趪鴥?nèi)用于生產(chǎn)聚丙烯酰胺。</p><p>陰離子<br />陰離子聚丙烯酰胺（APAM）產(chǎn)品描述：陰離子聚丙烯酰胺（APAM）外觀為白色粉粒，分子量從600萬到2500萬水溶解性好，能以任意比例溶解于水且不溶于有機溶劑。有效的PH值范圍為4到14，在中性堿性介質(zhì)中呈高聚合物電解質(zhì)的特性，與鹽類電解質(zhì)敏感，與高價金屬離子能交聯(lián)成不溶性凝膠體。</p><p>分子式：<br />工業(yè)廢水處理：對于懸浮顆粒，較出、濃度高、粒子帶陽電荷，水的PH值為中性或堿性的污水，鋼鐵廠廢水，電鍍廠廢水，冶金廢水，洗煤廢水等污水處理，效果zuihao。飲用水處理：我國很多自來水廠的水源來自江河，泥沙及礦物質(zhì)含量高，比較渾濁，雖經(jīng)過沉淀過濾，仍不能達到要求，需要投加絮凝劑，投加量是無機絮凝劑的1/50，但效果是無機絮凝劑的幾倍，對于有機物污染嚴重的江河水可采用無機絮凝劑和陽離子聚丙烯酰胺配合使用效果更好?，F(xiàn)投加陰離子聚丙烯酰胺，使淀粉微粒絮凝沉淀，然后將沉淀物經(jīng)壓濾機壓濾變成餅狀，可作飼料，酒精廠的酒精也可采用陰離子聚丙烯酰胺脫水，壓濾進行回收。用于河水泥漿沉降。用于造紙干強劑。</p><p> </p><p> </p> </div> </div> </div> <link rel="stylesheet" type="text/css" href="/css/MessageBoard_style.css"> <script language="javascript" src="/skins/Scripts/order.js?v=20210318" type="text/javascript"></script> <a name="order" id="order"></a> <div id="h53tpr5" class="ly_msg" id="ly_msg"> <form method="post" name="form2" id="form2"> <h3>留言框 </h3> <ul> <li> <h4 class="xh">產(chǎn)品：</h4> <div id="vntbfjl" class="msg_ipt1"><input class="textborder" size="30" name="Product" 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