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n-isopropyl-acrylamide
相关语句
  n-异丙基丙烯酰胺
     The structure and the unique thermo-responsive property of the poly(N-isopropyl-acrylamide) were determined by the()~1H NMR.
     利用1H NMR对温敏性凝胶聚N-异丙基丙烯酰胺结构进行表征,对温敏特性进行了检测.
短句来源
  “n-isopropyl-acrylamide”译为未确定词的双语例句
     Correlation and Prediction of Swelling Behavior of N-isopropyl-acrylamide Based Hydrogels in Aqueous Solution of Acetone
     IPAAm凝胶在丙酮水溶液中溶胀行为的关联与预报(英文)
短句来源
     In this paper, a new thermo-sensitive hydrogel that N-isopropyl -acrylamide (NIPAAm) was grafted onto ethylene-vinylacetate copolymer (EVA) by preirradiation grafting was obtained.
     通过空气中预辐照乙烯-醋酸乙烯共聚物(EVA)试片,将单体N-异丙基丙烯酰胺(NIPAAm)接枝到EVA表面上,得到一种新型的具有良好的热敏性及机械性能的水凝胶。
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  n-isopropyl-acrylamide
Cationic amino-containing N-isopropyl- acrylamide-styrene copolymer latex particles: 1-Particle size and morphology vs.
      
Cationic amino-containing N-isopropyl- acrylamide-styrene copolymer particles: 2-surface and colloidal characteristics
      
It has been shown that the swelling of poly-N-isopropyl-acrylamide (poly-NIPAM) microgel particles can be controlled by the addition of alcohols, in addition to the previously observed effect of temperature.
      
The ECM was formed from an aqueous solution of N-isopropyl-acrylamide co-polymers with a small amount of acrylic acid, which exhibited unique sol-gel transition in a temperature range of 30-34°C, without noticeable hysteresis.
      


Nitration of cis-β-(2-furyl) acrylic acid afforded the corresponding cis-β-(5-nitro-furyl), acrylic acid. It was readily converted to cis-β-(5-nitro-2-furyl)-N-isopropyl-acrylamide by amination with isopropylamine through the mixed anhydride method.The biological activity of this cis-isomer was examined in laboratory animals against experimental schistosomiasis and was shown to possess activity similar to that already reported for the trans-isomer.

呋喃丙胺顺式异构体的合成,系按文献方法制备顺式β-(5-硝基-2-呋喃)-丙烯酸,然后于低温下与异丙胺经混合酸酐法,氨化为顺式与反式两种酰胺的混合物,再经分离获得顺式异构体。实验动物药理结果证明其生物活性与反式异构体相似。

Temperature sensitive hydrogels have a sudden change of swelling in water at certain critical temperature range.This property can be used to concentrate very dilute biomaterial from aqueous solution or to separate biomaterials from water.In this paper,the preparation of N-isopropyl acrylamide(NIPA) and N,N-methylene bis acrylamide(Bis) hydrogel bead by inverse suspension polymerization and the separation properties of the hydrogel were studied.

热敏性水凝胶是指凝胶在水中在某一临界温度附近,随温度的微小变化,水凝胶的体积会发生突跃性变化。该性能可用于极稀的生物物质水溶液的浓缩和萃取分离。本文研究了用反相悬浮聚合法合成N-异丙基丙烯酰胺(NIPA)和N、N-次甲基双丙烯酰胺(Bis)的珠状水凝胶以及水凝胶的分离性能。

The poly (N-isopropyl acrylamide) (PNIPA) samples were prepared byfree radical polymerhation in water and in acetone/benzene respectively. The GPCshows that both polymer samples .obtained from the above two media have singledistribution peak with molecular weight, M. of 129 000 and 55 900 respectively (usingpolystyrene as the standard). FT-IR confirmed by the amide groups did not hydrolyzeduring the polymerhation. X-ray diffraction and DSC reveal that due to both effectsof hydrophobic isopropyl groups and...

The poly (N-isopropyl acrylamide) (PNIPA) samples were prepared byfree radical polymerhation in water and in acetone/benzene respectively. The GPCshows that both polymer samples .obtained from the above two media have singledistribution peak with molecular weight, M. of 129 000 and 55 900 respectively (usingpolystyrene as the standard). FT-IR confirmed by the amide groups did not hydrolyzeduring the polymerhation. X-ray diffraction and DSC reveal that due to both effectsof hydrophobic isopropyl groups and hydrogen bonds at amide group, the polymer isin the amorphous state (Tg≈ 407K). The results of X-ray diffraction and IRsuggest that the moleCular chainS of PNIPA would condense with someWhat orderstate suitable to be fit by the paracrystalline model. Besides, the strength of hydrogenbond and diffraction pattern are correlated somewhat with the sample-preparingmethod.

为了探讨聚(N-异丙基丙烯酰胺)的凝聚态结构,在水和丙酮/苯两种介质中采用自由基聚合合成了聚(N-异丙基丙烯酰胺)简称PNIPA。GPC表明两种PNIPA的分子量均为单一分布,Mw分别为129000和55900(以聚苯乙烯为标样)。FT—IR证明酰胺基没有被水解。X射线和DSC表明,核聚合物的凝聚态结构中由于异丙基和氢键的共同作用,聚合物基本呈无定形态,Tg为407K,热降解温度达395K,分析X射线和IR的结果发现,PNIPA分子链排列有一定的序度,建议采用仲晶模型来描述。另外,聚合物中氢键的强弱及X射线衍射强度还与制样方法有关。

 
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