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偶氮聚酯
相关语句
  azo polyester
     Synthesis and Photo-responsive Behavior of a Novel Main-chain Azo Polyester
     主链型偶氮聚酯的合成和光响应性研究
短句来源
  “偶氮聚酯”译为未确定词的双语例句
     The Fourier transform infrared emission spectra of azopolyester liqvid crystalline polymer and phenolic ester liquid crystal have been investigated.
     本文研究了偶氮聚酯液晶、苯酚酯类液晶二类有机化合物的付里叶变换红外发射光谱。
短句来源
  相似匹配句对
     Synthesis and Photo-responsive Behavior of a Novel Main-chain Azo Polyester
     主链型偶氮聚酯的合成和光响应性研究
短句来源
     The biodegradable polyesters
     生物降解性聚酯
短句来源
     Media, carbon sources and nitrogen sources could affect the decolorization.
     偶氮染料;
短句来源
     SYNTHESIS OF UNSATURATED POLYESTERS
     不饱和聚酯的合成
短句来源
     SYNTHESIS AND CHARACTERIZATION OF POLYESTERS BEARING AZO GROUP FOR NONLINEAR OPTICS
     含偶氮基团的聚酯型高分子非线性光学材料的合成与表征
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  azo polymer
Elastomeric replicas of surface relief structures were prepared by molding poly(dimethylsiloxane) (PDMS) precursors against photo-inscribed surface-relief-gratings on azo polymer films.
      
This article reports the synthesis and photoresponsive properties of a hyperbranched azo polymer containing electron donor-acceptor type azo chromophores both in backbone and peripheral positions.
      
The azo polymer was characterized by 1H nuclear magnetic resonance (NMR), ultraviolet-visible (UV-Vis) spectrum and thermal analysis.
      
The drug-release profiles indicate that the degradation of the azo polymer coatings depends on their degree of swelling, due to a higher accessibility of the azo bonds for the bacterial azo reductase.
      
Release and absorption from the cecum is the combined result of diffusion and degradation of the azo polymer coatings by bacterial azo reductase.
      


The Fourier transform infrared emission spectra of azopolyester liqvid crystalline polymer and phenolic ester liquid crystal have been investigated. The applicability of the pressed KBr sandwich disk sampling technique for organic compounds has been successfully shown, The error caused by the vaporization, oxidation and carbonization of organic compound can be redued, and thus thquality of the spectra will be better. Emission temperature is an important factor. The relative emissivity is weaked during temperature...

The Fourier transform infrared emission spectra of azopolyester liqvid crystalline polymer and phenolic ester liquid crystal have been investigated. The applicability of the pressed KBr sandwich disk sampling technique for organic compounds has been successfully shown, The error caused by the vaporization, oxidation and carbonization of organic compound can be redued, and thus thquality of the spectra will be better. Emission temperature is an important factor. The relative emissivity is weaked during temperature elevation, at the phase transition point the emissivity rised suddenly, and some bands may be displaced. The effect of temperature on infrared emission spectra is studied systematically.

本文研究了偶氮聚酯液晶、苯酚酯类液晶二类有机化合物的付里叶变换红外发射光谱。结果表明,采用溴化钾夹心压片法制样有助于克服有机物高温氧化、挥发和碳化问题,提高了光谱的质量。发射温度是影响发射谱的重要因素:升温时,相对发射率下降;在相变点时发射率上升出现突变,温度变化可使某些峰发生位移。本文系统地考察了温度对它们的影响。

Hydrophobicity and increased acidity due to degradation are two fatal shortcomings for poly(lactic acid) (PLA) to be used in biomedical areas. Many chemical modifications have been done to improve its hydrophilicity, but the increased acidity is still a problem. Although introduction of basic salts into PLA by physical blending is a technique to control the pH in local environment of PLA, it could not essentially address the problem of increased acidity. Here we synthesized ethylenediamine modified poly(DL-lactic...

Hydrophobicity and increased acidity due to degradation are two fatal shortcomings for poly(lactic acid) (PLA) to be used in biomedical areas. Many chemical modifications have been done to improve its hydrophilicity, but the increased acidity is still a problem. Although introduction of basic salts into PLA by physical blending is a technique to control the pH in local environment of PLA, it could not essentially address the problem of increased acidity. Here we synthesized ethylenediamine modified poly(DL-lactic acid) (EMPLA) by the N-acylation of anhydrides in MPLA (maleic anhydride modified poly(DL-lactic acid)) with ethylenediamine, whereby basic ethylenediamine could neutralize the acidic degrading products of PLA. In this paper, the synthesis and purification of EMPLA were reported in detail, and ninhydrin reaction, DSC, FT-IR, ()~(13)C-NMR and ()~1H-NMR were used to characterize EMPLA. The obtained results show that ethylenediamine could be covalently introduced into MPLA by the developed synthetic method, which provides technical and material supports for further detecting biodegradability and biocompatibility of EMPLA and finally applications in biomedical areas.

合成了具有大π共轭体系的偶氮染料单体4-(二羟乙胺基)-4′-硝基偶氮苯(DR-19),选择不同单体与之反应,通过酯化、氨基甲酸酯化反应合成了偶氮聚酯、偶氮聚氨酯 和偶氮聚氨酯 三种偶氮聚合物。UV-vis、RF光谱研究发现,聚合物具有很好的光性能,且与之反应的单体对紫外、荧光性能有较大影响;DSC、TGA热性能研究发现,与之反应的单体决定了聚合物的热性能。

 
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