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clytze_520金蟲(chóng) (小有名氣)
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[求助]
麻煩翻譯一段文獻(xiàn)
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Copolyetheramides with different chemical compositions and block lengths were prepared from N6,PEO, AA, and HMD following the "three-step route"outlined in Figure 1. In the first step, N6 was reacted with an excess amount of AA to obtain a carboxyterminated N6. Then the reaction mixture was purified by solvent-nonsolvent method to remove unreacted AA. The excess amount of AA accounts for two facts: (1) to prevent chain extension of end-capped N6 and (2) to verify the completion of the end-capping process which is one of the specifications to approach a narrow molecular weight distribution of the ultimate product. In the second step, chain extension was performed by reacting AA with PEO and HMD with end-capped N6 for samples consisting of lower (<20 wt %) and higher (>20 wt %) amounts of PA, respectively. In the final step, polycondensation was accomplished under vacuum to remove the produced water, supporting the formation of copolymer chains. |
鐵桿木蟲(chóng) (正式寫(xiě)手)
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具有不同化學(xué)成分和塊長(zhǎng)度的共聚酰胺由N6、PEO、AA和HMD按照?qǐng)D1中概述的"三 步路線"進(jìn)行。在第一步中,N6 被反應(yīng)與過(guò)量的 AA,以獲得碳化 N6。然后用溶劑 -溶劑法對(duì)反應(yīng)混合物進(jìn)行凈化,去除未反應(yīng)的AA。AA 的過(guò)量量說(shuō)明兩個(gè)事實(shí):(1) 防止端蓋 N6 的鏈?zhǔn)窖由旌?(2) 驗(yàn)證最終封頂過(guò)程的完成,這是接近最終產(chǎn)品的窄 分子量分布的規(guī)格之一。在第二步中,鏈延伸通過(guò)響應(yīng) AA 與 PEO 和 HMD 與端蓋 N6 對(duì)包含較低的樣本 (<20 wt%)和更高 (>20 wt %)數(shù)量,分別。在最后一步, 在真空下完成多冷凝,以去除產(chǎn)生的水,支持共聚鏈的形成。 |

銅蟲(chóng) (初入文壇)
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按照 在圖1中概述"三步法"路線 ,由N6、PEO、AA和HMD制備了具有不同化學(xué)成分和嵌段長(zhǎng)度的共聚醚酰胺。第一步,N6與過(guò)量的AA反應(yīng),得到羧基末端的N6。然后反應(yīng)溶劑-非溶劑法純化混合物,以去除未反應(yīng)的AA。過(guò)量的AA占兩個(gè)事實(shí)。(1)防止端蓋N6的擴(kuò)鏈;(2)驗(yàn)證端蓋過(guò)程的完成情況,這是接近端蓋的規(guī)格之一。 窄分子量分布的最終產(chǎn)品。在第二步中,通過(guò)使AA與PEO反應(yīng),進(jìn)行鏈的延伸。 HMD與端蓋N6的樣品由較低(<20重量%)和較高(>20重量%)量的PA,分別在最后一步中,聚合在真空下完成,以除去產(chǎn)生的水,支持共聚物鏈的形成。 |

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