本文關(guān)鍵詞： 硫磺 不溶性硫磺 低溫熔融法 熱穩(wěn)定性　出處：《華東理工大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：本論文對國內(nèi)外不溶性硫磺的研究進(jìn)展進(jìn)行了比較詳細(xì)的綜述。以工業(yè)硫磺為原料,采用低溫熔融法工藝制備不溶性硫磺。通過正交實驗設(shè)計考察工藝條件對硫磺聚合轉(zhuǎn)化的影響,綜合考慮硫磺聚合轉(zhuǎn)化率、產(chǎn)品的熱穩(wěn)定性、萃取效果,不溶性硫磺制備工藝條件為：聚合溫度280℃,聚合時間20min,升溫速率4℃/min,淬冷液用室溫下的去離子水,其用量與原料硫磺的質(zhì)量比為10：1,固化溫度60℃,固化時間2h,在淬冷液中添加0.6%的乙二醇作穩(wěn)定劑,產(chǎn)品精制采用四氫萘作萃取劑,萃取溫度70℃,劑硫比按7：1分兩次萃取,每次萃取10min,由此硫磺聚合所得產(chǎn)品中不溶性硫磺的含量達(dá)43%左右,精制后產(chǎn)品純度可達(dá)96%左右。萃取和充油過程穩(wěn)定劑的加入均可顯著提高產(chǎn)品熱穩(wěn)定性,但充油過程穩(wěn)定劑的加入效果更好。萃取和充油階段同時添加穩(wěn)定劑能進(jìn)一步提高產(chǎn)品的穩(wěn)定性,當(dāng)兩階段同時加入2%的酯類穩(wěn)定劑C時效果最好,產(chǎn)品的熱穩(wěn)定性可達(dá)到50.45%。無論硫磺聚合轉(zhuǎn)化率還是不溶性硫磺產(chǎn)品熱穩(wěn)定性均達(dá)到同類工藝的領(lǐng)先水平。
[Abstract]:In this paper, the research progress of insoluble sulfur at home and abroad is reviewed in detail. The insoluble sulfur was prepared by low temperature melting process. The effects of the process conditions on the conversion of sulfur polymerization were investigated by orthogonal experimental design. The conversion of sulfur polymerization, the thermal stability of the product and the extraction effect were considered synthetically. The preparation conditions of insoluble sulfur are as follows: polymerization temperature 280 鈩，

本文編號：1512904