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翻譯一段 漢譯英 急！
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這是一篇關(guān)于化學(xué)降解PET制備新型塑化劑的文章，其研究目的是吸引人的。乙醇胺和PET反應(yīng)得到單體BHETA這個(gè)反應(yīng)對(duì)于作者來說并非首創(chuàng)，而且，對(duì)反應(yīng)條件的探索上尚欠缺，例如胺解反應(yīng)中，PET：EA的比例對(duì)反應(yīng)的影響中，隨著比例1：1，1：2.5到1：4，產(chǎn)率逐漸增大，是否應(yīng)該探索一下繼續(xù)升高PET：EA的比例對(duì)反應(yīng)的影響呢?同樣，當(dāng)反應(yīng)時(shí)間超過4h的時(shí)候，產(chǎn)率有什么變化?圖1給出的反應(yīng)方程式有嚴(yán)重的錯(cuò)誤，在這個(gè)反應(yīng)中是正庚酸的羧基脫去羥基。作者對(duì)圖5，BHETA的DSC出現(xiàn)兩個(gè)放熱峰的解釋并不充分，另外，我認(rèn)為圖9，BHETA的XRD與DSC的結(jié)果，也就是XRD的結(jié)果和BHETA的熔點(diǎn)沒有必然的聯(lián)系。綜合來講，作者完成的研究并不深入，很多地方缺乏科學(xué)性的論證。 [ Last edited by 板凳匪徒 on 2013-6-27 at 10:37 ] |
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hyt0615
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愛與雨下: 金幣+1 2013-06-27 21:38:40
愛與雨下: 金幣+1 2013-06-27 21:38:40
| Using the chemical degradation of PET to prepare new plasticizer was reported in this study, which is appealing. The reaction of ethanolamine and PET obtained BHETA monomer. But, this reaction is not the pioneer for the author. Moreover, the exploration of the reaction conditions is still lacking. For example, the influence of the ratio of PET and EA on the aminolysis reaction, as the ratio changed from 1:1 to 1:2.5 and 1:4, the yield was increased. If this ratio was further increased, what is the situation? Similarly, the reaction time exceeds 4 hours, what is the change of the yield? The reaction equation showed in the Figure 1 has a fatal error. It should be the hydroxyl removal of carboxyl of n-heptanoic acid. The explanations for the appearance of the two exothermic peaks in DSC of BHETA in Fig.5 were not sufficient. Also, I think XRD and DSC of BHETA in Fig.9, that is, the results of XRD and the melting point of BHETA is not necessarily linked. In summary, this study is not in-depth, and lack of scientific proof. |
2樓2013-06-27 20:43:37
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