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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>江蘇省</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>上海多POM批發(fā)廠家,POM</p><p><span>***更新：</span>2021-02-03 09:20:47</p><p><span id="click" >瀏覽次數(shù)：1次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="tcijk2v" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">蘇州晶塑米新材料有限公司</a></p><p><span>聯(lián)系人：</span>李麗</p><p><span>郵箱: </span>321260043@qq.com</p><p><span>電話: </span>15162619982</p><p><span>傳真: </span>151_</p><p><span>網(wǎng)址: </span>http://szjingsumi.shop.88360.com</p><p><span>手機(jī): </span>151-62619982</p><p><span>地址: </span>陸家鎮(zhèn)陸豐東路3號(hào)仕泰隆模具城17-8號(hào)</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="gplmdef" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="gpgctfw" class="box"><p><p style="text-indent:25px">聚甲醛(POM)可替代哪幾種工程塑料：1.替代聚碳酸酯汽車工業(yè)中PC在內(nèi)外裝飾件方面使用歷史比較悠久，但聚甲醛固有性能加上相關(guān)新技術(shù)帶來的可能性及成本差別，使之在內(nèi)外裝飾件范疇內(nèi)替代了一大批PC的結(jié)構(gòu)方案。 2.替代聚苯硫醚PPS雖體現(xiàn)出它對(duì)與其他通用工程塑料的總體優(yōu)勢，但實(shí)際的應(yīng)用領(lǐng)域中，綜合性能方面與聚甲醛的差距，以及聚甲醛本身的特長，上海多POM批發(fā)廠家，使聚甲醛有很好的機(jī)會(huì)進(jìn)入通常為PPS所占據(jù)的應(yīng)用領(lǐng)域，上海多POM批發(fā)廠家。 3.替代聚四氟乙烯：摩擦磨耗特性與耐疲勞、耐蠕變性，使得其在許多應(yīng)用中能夠取代聚四氟乙烯，上海多POM批發(fā)廠家。聚甲醛之所以有前景極好以及能扮演多面角色這兩個(gè)好處，就是它有過千頭萬緒的不同用法，有了太多的商業(yè)上可以得到的現(xiàn)成的品級(jí)選擇范圍，色的摩擦磨耗特性加上出色的剛性抗蠕變及抵御烴類的能力，市場上的地位可用強(qiáng)勁二字來描述。聚甲醛用于注射成型、注塑成型和擠出成型的縮醛樹脂都可買到。上海多POM批發(fā)廠家</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="上海多POM批發(fā)廠家,POM" src="https://tyunfile.71360.com/UploadFile/szjingsumi/637387287884734903/8623844.png"></div><p style="text-indent:25px">簡介：縮醛樹脂是強(qiáng)而硬且有良好疲勞性和熱穩(wěn)定性的熱塑(性)塑料，它電具有低的摩擦系數(shù)和良好的耐熱性以認(rèn)為縮醛樹脂類似于尼龍，但它的耐疲勞性、耐蠕變性、硬度和耐水性比尼龍更好。但是縮醛樹脂的抗蠕變能力不如聚碳酸酯。如前所述，縮醛樹脂具有優(yōu)異的耐溶劑性，還沒有找到在70℃以下可以溶解縮醛樹脂的有機(jī)溶劑；但是它可以在某些溶劑中溶脹?？s醛樹脂對(duì)酸、堿和氧化劑敏感。盡管C—O鍵是極性的．但它已被平衡．且極性比尼龍中的羰基小得多，其結(jié)果導(dǎo)致縮醛樹脂具有相對(duì) 低的吸濕性。吸附的少量濕氣可能引起溶脹和尺寸變化，但不會(huì)導(dǎo)致聚合物水解而降解。濕氣的影響比尼龍聚合物小得多。紫外線光町能會(huì){f起聚合物降解，町以通過加入炭黑來降低這種降解。共聚物通常具有和均聚物類似的性質(zhì)，但均聚物的力學(xué)性能比共聚物稍高一些．其熔點(diǎn)也更高，但其熱穩(wěn)定性和耐堿性比共聚物差。均聚物和共聚物都是填充填料(玻璃纖維、含氟聚合物、芳族聚酰胺纖維和其他填料)制成增韌級(jí)、紫外線光(UV)穩(wěn)定級(jí)材料?？s醛樹脂與聚氨酯彈性體共混提高其韌性，這些材料都可以在市場上買到。上海多POM批發(fā)廠家聚甲醛除了酸性物質(zhì)耐受性差以外，對(duì)大部分的化學(xué)試劑耐受性都非常好。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="上海多POM批發(fā)廠家,POM" src="https://tyunfile.71360.com/UploadFile/szjingsumi/637387288040623353/6169138.png"></div><p style="text-indent:25px">簡介：縮醛聚合物即聚甲醛是由甲醛聚合形成的，它也常稱做聚氧亞甲基(POM)。由甲醛來制備聚合物早在20世紀(jì)20年代就被研究過，但是直到l950年杜邦開發(fā)出Delrin (戴林)以前尚來制得熱穩(wěn)定的材料。均聚物是用非常純的甲醛經(jīng)陰離子聚合制得。形成的聚合物是不溶的。隨著聚合反應(yīng)的進(jìn)行不斷析出。隨著甲醛選出縮醛樹脂被拉開，于是發(fā)生了熱降解。聚合物的熱穩(wěn)定性可通過端羥基與**的酯化來提高。改善熱穩(wěn)定性的另一個(gè)方法是與第二單體：如環(huán)氧乙烷等共聚，其聚物是按陽離子聚合法制備的。</p><p style="text-indent:25px">聚甲醛阻燃改性：純聚甲醛具有易燃的性質(zhì)，屬于極易燃燒的塑料。阻燃劑的添加是重要的改性手段。直接添加阻燃劑很難使聚甲醛具有優(yōu)良的阻燃性能，復(fù)合阻燃體系可以增加聚甲醛的相容性。目前業(yè)內(nèi)關(guān)于聚甲醛阻燃研究主要集中于無鹵膨脹型阻燃體系。聚甲醛常用的膨脹體系一般有：阻燃劑、成炭劑、甲醛吸收劑等三個(gè)部分。其經(jīng)典構(gòu)成有聚磷酸胺、**和三聚氰胺，它們都具有良好的阻燃性，而且符合當(dāng)前對(duì)阻燃劑的少煙、低毒的要求，可以同時(shí)提高聚甲醛的阻燃性、熱穩(wěn)定性和光穩(wěn)定性。聚甲醛為乳白色不透明結(jié)晶性線性熱塑性樹脂，有良好的綜合性能和著色性，具有較高的彈性模量。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="上海多POM批發(fā)廠家,POM" src="https://tyunfile.71360.com/UploadFile/szjingsumi/637387287940535671/468471.png"></div><p style="text-indent:25px">生產(chǎn)均聚甲醛的工藝：均聚甲醛是三聚甲醛的均聚體，在抗疲勞強(qiáng)度和延展強(qiáng)度方面都有著非常出色的表現(xiàn)，但是對(duì)其進(jìn)行加工時(shí)有著一定的難度，而且在進(jìn)行加工時(shí)其加工溫度的范圍是比較小的，在成型時(shí)熱分解、熱穩(wěn)定性、熱劣化特性、耐酸堿腐蝕性以及耐熱水性等方面均聚甲醛是不如共聚甲醛的。但是均聚甲醛的結(jié)晶度是非常高的，在彈性率、強(qiáng)度以及表征物理耐熱性的復(fù)合彎曲溫度方面要略好于共聚甲醛。同時(shí)聚甲醛具備著十分較好的剛性，其拉伸強(qiáng)度zui高可達(dá)到68.9MPa，而且均聚甲醛的摩擦因素比較小、耐磨性比較好，但是均聚甲醛在耐酸和穩(wěn)定性方面是比較差的。聚甲醛繼聚酰胺之后又一種綜合性能優(yōu)良的工程塑料，具有高的力學(xué)性能。無錫POM</p><p style="text-indent:25px">聚甲醛在路易斯酸的作用下共聚的生產(chǎn)技術(shù)。上海多POM批發(fā)廠家</p><p style="text-indent:25px">功能化改性（方向和熱點(diǎn)）：提高摩擦磨損性能：在聚甲醛樹脂中加入有機(jī)油或硅油、聚四氟乙烯（PTFE）或二硫化鉬，可以達(dá)到降**品表面摩擦系數(shù)及磨損率的作用。潤滑聚甲醛zui適用于機(jī)械、電子電器用零件的傳動(dòng)部位材料，如齒輪、滾輪、凸輪、連桿類制品。 ① 添加PTFE、PE、UHMWPE 等自身摩擦系數(shù)較低的結(jié)晶性高分子材料。 ② 添加玻纖、碳纖等纖維狀材料。 ③ 添加硅油、礦物油、油脂等潤滑油及潤滑脂類。 ④ 添加MoS2 、石墨等無機(jī)粉類潤滑材料。 ⑤ 利用接枝、嵌段等手段在POM 分子鏈上引入具有潤滑性的鏈段。上海多POM批發(fā)廠家</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/3141980.html</p></div></div></div></div></div><div id="ydkgmie" class="page-right 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