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/>【廊坊化工】環(huán)氧樹脂是泛指分子中含有兩個(gè)或兩個(gè)以上環(huán)氧基團(tuán)的有機(jī)高分子化合物，除個(gè)別外，它們的相對(duì)分子質(zhì)量都不高。環(huán)氧樹脂的分子結(jié)構(gòu)是以分子鏈中含有活潑的環(huán)氧基團(tuán)為其特征，環(huán)氧基團(tuán)可以位于分子鏈的末端、中間或成環(huán)狀結(jié)構(gòu)。由于分子結(jié)構(gòu)中含有活潑的環(huán)氧基團(tuán)，使它們可與多種類型的固化劑發(fā)生交聯(lián)反應(yīng)而形成不溶、不熔的具有三向網(wǎng)狀結(jié)構(gòu)的高聚物。<br />環(huán)氧樹脂軟化劑應(yīng)用特性<br />1、形式多樣。各種樹脂、固化劑、改性劑體系幾乎可以適應(yīng)各種應(yīng)用對(duì)形式提出的要求，其范圍可以從極低的粘度到高熔點(diǎn)固體。<br />2、固化方便。選用各種不同的固化劑，環(huán)氧樹脂體系幾乎可以在0～180℃溫度范圍內(nèi)固化。<br />3、粘附力強(qiáng)。環(huán)氧樹脂分子鏈中固有的極性羥基和醚鍵的存在，使其對(duì)各種物質(zhì)具有很高的粘附力。環(huán)氧樹脂固化時(shí)的收縮性低，產(chǎn)生的內(nèi)應(yīng)力小，這也有助于提高粘附強(qiáng)度。<br />4、收縮性低。環(huán)氧樹脂和所用的固化劑的反應(yīng)是通過直接加成反應(yīng)或樹脂分子中環(huán)氧基的開環(huán)聚合反應(yīng)來進(jìn)行的，沒有水或其它揮發(fā)性副產(chǎn)物放出。它們和不飽和聚酯樹脂、酚醛樹脂相比，在固化過程中顯示出很低的收縮性(小于2%)。<br />5、力學(xué)性能。固化后的環(huán)氧樹脂體系具有優(yōu)良的力學(xué)性能。<br />6、電性能。固化后的環(huán)氧樹脂體系是一種具有高介電性能、耐表面漏電、耐電弧的優(yōu)良絕緣材料。<br />7、化學(xué)穩(wěn)定性。通常，固化后的環(huán)氧樹脂體系具有優(yōu)良的耐堿性、耐酸性和耐溶劑性。像固化環(huán)氧體系的其它性能一樣，化學(xué)穩(wěn)定性也取決于所選用的樹脂和固化劑。適當(dāng)?shù)剡x用環(huán)氧樹脂和固化劑，可以使其具有特殊的化學(xué)穩(wěn)定性能。<br />8、尺寸穩(wěn)定性。上述的許多性能的綜合，使環(huán)氧樹脂體系具有突出的尺寸穩(wěn)定性和耐久性。<br />9、耐霉菌。固化的環(huán)氧樹脂體系耐大多數(shù)霉菌，可以在苛刻的熱帶條件下使用。<br /><br />陽離子交換樹脂<br />你們可能還不知道我們生活的水都屬于硬水，軟化過后的水，對(duì)人們的健康非常有利，這又被稱作軟化水。點(diǎn)、就是其軟化水處理當(dāng)中采用膜分離法，內(nèi)容主要包括超濾法/微濾法/納濾等。這些膜法技術(shù)效果穩(wěn)定并且可以攔截水中的鈣、鎂等離子和。這樣得軟化水設(shè)備投資稍高，但是很適用水的范圍很廣。第二點(diǎn)、是軟化水離子交換法當(dāng)中是采用軟化水離子交換樹脂，由于水處理鈉鹽的溶解度很高，避免了造成水垢生成的情況，采用離子交換法的工藝變得比較成熟，其效果比較準(zhǔn)確穩(wěn)定。因?yàn)檐浕幚碓O(shè)備量大，采用這種軟化水處理方法，是可以將水硬度降至為零。第三點(diǎn)、第三種是不太提倡的一種，軟化水處理加藥法工藝，在設(shè)備里可以加上阻垢劑，投加阻垢劑這種方法。</p> <div class="ueyagssc" id="news_sx"><li id="ueyagssc" class="sx_left">上一篇：<a href="/Article-2247560.html">陰陽離子交換樹脂</a> <br />下一篇：<a href="/Article-2247552.html">717陰離子交換樹脂</a></li></div> </div> </div> </div> </div> <div id="ueyagssc" class="clear"></div> <div class="ueyagssc" id="footer"> <div 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