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[求助]
求助漢翻英。歡迎指正錯誤。。高分子材料方面
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高分子材料方面求指正改正。。。。 對于HEC，在HEC用量為5g、醚化劑用量為7.5g、堿用量1.85g、在65℃下反應(yīng)2小時，得到的QHEC取代度最優(yōu)為0.61，反應(yīng)效率為64%；對于PVA，在PVA的濃度為5%、醚化劑用量為7g、堿用量2.5g、在65℃下反應(yīng)6小時，得到的QPVA取代度最優(yōu)為3.95。 For HEC, the HEC dosage of 5g, etherification agent is 7.5g, alkali 1.85g, at 65 ℃ for 2 hours, the optimal degree of substitution obtained QHEC 0.61, the reaction efficiency was 64%; for the PVA, the PVA concentration of 5%, etherification agent is 7g, alkali 2.5g, at 65 ℃ for 6 hours, get QPVA optimal degree of substitution 3.95. [ Last edited by mlnjut on 2011-5-27 at 20:12 ] |
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【答案】應(yīng)助回帖
mlnjut(金幣+4): 可以的。。嘿嘿 2011-05-27 20:43:49
mlnjut(金幣+6): 2011-05-28 08:15:58
mlnjut(金幣+6): 2011-05-28 08:15:58
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the optimal degree of substitution obtained QHEC 0.61, the reaction efficiency was 64%可以做主句， For HEC, the HEC dosage of 5g, etherification agent is 7.5g, alkali 1.85g, at 65 ℃ for 2 hours,用“when.....” 不知道可以不 |
8樓2011-05-27 19:54:41
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2樓2011-05-27 16:21:47
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Mally89(金幣+1): 感謝應(yīng)助！~歡迎常來！~ 2011-05-27 19:41:15
Mally89(金幣+1): 感謝應(yīng)助！~歡迎常來！~ 2011-05-27 19:41:15
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PVA and HEC are water-soluble. We used 3-chloro-2-hydroxypropyl trimethyl ammonium chloride as etherifying agent to introduce quaternary ammonium groups into the structure of PVA and HEC through quaternization reaction to prouduce quaternized QPVA and QHEC, respectively. The effect of reaction conditions on the degree of substitution and reaction efficiency were studied. For HEC, the HEC dosage of 5g, etherification agent is 7.5g, alkali 1.85g, at 65 ℃ for 2 hours, the optimal degree of substitution obtained QHEC 0.61, the reaction efficiency was 64%.(這句話沒有謂語）好好改改~ for the PVA, the PVA concentration of 5%, etherification agent is 7g, alkali 2.5g, at 65 ℃ for 6 hours, get QPVA optimal degree of substitution 3.95. （同上） |
3樓2011-05-27 16:22:46
4樓2011-05-27 16:28:40
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