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| 本帖產(chǎn)生 1 個 翻譯EPI ，點擊這里進(jìn)行查看 | ||
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檸檬曉精靈新蟲 (正式寫手)
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[求助]
求助：一篇文獻(xiàn)的摘要翻譯，急
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Abstract ：This work deal with the influence that addition of poly tolylene 2,4-diisocyanate terminated prepolymer at different stages during the manufacturing process of a traditional lithium lubricating grease exerts on its rheological and morphological characteristics.With this aim ,the reaction between terminal isocyanate groups and the hydroxy group located in the hydrocarbon chain of the 12-hydroxystearate lithium soap was intended to be promoted during lubricating grease processing.Several PBTDI-based greases just differing in the process stage at which this polymer was added were prepared. The polymer used and the final lubricating greases were characterized by FTIR spectroscopy and DSC techniques. The effect of PBTDI addition at different processing stages was tasted on final greases by performing small-amplitude oscillactory shear (SAOS)measurements as well as atomic force microscopy(AFM)observations. Addition of PBTDI significantly increased the values of the linear viscoelasticity functions when it was added during the final cooling stage of the manufacturing process. it was demonstrated that this increment in relation to the values found for the additive-free lubricating grease was only observed when PBTDI chemically interacted with the soap network. However , the effectiveness of PBTDI as rheology modifier was much lower when the addition took place at earlier steps of the manufacturing process.Some competitive reactions due to either the presence of water or the high temperatures applied have been proposed to explain this loss of effectiveness depending on the lubricating grease processing stage at which PBTDI was added. |
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檸檬曉精靈
新蟲 (正式寫手)
- 應(yīng)助: 3 (幼兒園)
- 金幣: 548.3
- 散金: 210
- 帖子: 460
- 在線: 65.9小時
- 蟲號: 2182669
- 注冊: 2012-12-12
- 性別: MM
5樓2013-04-02 13:06:16
檸檬曉精靈
新蟲 (正式寫手)
- 應(yīng)助: 3 (幼兒園)
- 金幣: 548.3
- 散金: 210
- 帖子: 460
- 在線: 65.9小時
- 蟲號: 2182669
- 注冊: 2012-12-12
- 性別: MM
2樓2013-04-01 22:07:02
【答案】應(yīng)助回帖
★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★
檸檬曉精靈: 金幣+30, 翻譯EPI+1, ★★★很有幫助 2013-04-02 13:05:39
檸檬曉精靈: 金幣+30, 翻譯EPI+1, ★★★很有幫助 2013-04-02 13:05:39
| 摘要：此試驗主要研究，加入不同程度的聚亞甲苯基2,4 - 二異氰酸酯對傳統(tǒng)鋰潤滑脂生產(chǎn)過程中的影響。為此，位于烴鏈中的12 - 羥基硬脂酸鋰皂的羥基和終端異氰酸酯組之間的化學(xué)反應(yīng)會促進(jìn)潤滑油脂加工。一些基礎(chǔ)PBTDI-潤滑脂只是在不同階段加入在該聚合物溶液。用紅外光譜和DSC技術(shù)確定最終產(chǎn)物潤滑脂的特點。通過最終產(chǎn)物油脂進(jìn)行小幅度剪切（SAOS）測量以及原子力顯微鏡（AFM）觀察確定PBTDI在不同時期對生產(chǎn)過程中的影響。在冷卻過程中添加時可發(fā)現(xiàn)PBTDI線性粘彈性功能值數(shù)明顯增加。實驗結(jié)果表明，這些增量只有在PBTDI的相互作用之下才看到。不過在早期生產(chǎn)過程中，PBTDI作為流變改性劑其影響不大。由于水的存在或高溫導(dǎo)致的一些競爭反應(yīng)可解釋PBTDI的有效性降低取決于所加入的潤滑脂加工階段。 |
3樓2013-04-02 00:06:41
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