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-二氟二苯酮
相关语句
  4 '-difluorobenzophenone
     l. Epoxy-terminated poly(aryl ether sulfone ketone) (E-PPESK) was synthesized by the reaction of epichlorohydrin with PPESK oligomer prepared by nucleophilic substitution of 4,4'-dichloro-benzosulfone and 4,4'-difluorobenzophenone with 4-(4-hydroxypheny)-2,3-phthalazin-l-one.
     1.以4-4’-二氯二苯砜(DCS)、4-4’-二氟二苯酮(DFK)和4-(4-羟基苯基)-2,3二氮杂萘-1-酮(DHPZ)为原料通过亲核取代反应合成了PPESK预聚体。
短句来源
     1-(2-fluorophenyl)-1-(4-fluorophenyl) oxirane was synthesized by the reaction of 2,4'-difluorobenzophenone and trimethylsulphonium hydrogen sulphate in basic conditions.
     以2,4’-二氟二苯酮和锍盐(CH3)3SHSO4为原料,在碱性条件下反应生成1-(2-氟苯基)-1-(4-氟苯基)环氧乙烷。
短句来源
     Through orthogonal experimental design,the optimum reaction conditions were determined: molar ratio of potassium hydroxide, methanol and 2,4'-difluorobenzophenone was 6∶1.25∶1,reaction temperature was 45℃.
     通过正交实验确定最佳工艺条件为:氢氧化钾、甲醇和2,4’-二氟二苯酮的物质的量比为6∶1.25∶1,反应温度45℃。
短句来源
     Calculated based on 2,4'-difluorobenzophenone,the yield and purity of 1-(2-fluorophenyl)-1-(4-fluorophenyl) oxirane was 91.23% and 97.45% respectively.
     以2,4’-二氟二苯酮计,产品收率为91.23%,含量为97.45%。
短句来源
  “4’-二氟二苯酮”译为未确定词的双语例句
     Poly(ether ether ketone)s containing the structure unit of naphthalene rings were prepared by the nucleophilic substitution reaction of 4,4'-difiuoro diphenyl ketone with p-bisphenol and 1,5-dihydroxy naphthalene using diphenyl sulfone(Ph2SO2) as solvent in the presence of anhydrous potassium carbonate(K2CO3) and sodium carbonate(Na2CO3) as catalysts.
     本文以4,4’-二氟二苯酮、对苯二酚、1,5-二羟基萘为单体,二苯基砜为溶剂,K_2CO_3和Na_2CO_3的混合物为催化剂,采用亲核缩聚反应合成了含萘聚醚醚酮,用DSC、TGA、X—光衍射等手段对合成的聚合物进行了表征。
  相似匹配句对
     A NEW SYNTHESIS OF 4—HYDROXY—4'—X—DIPHENYL KETONE
     4—羟基—4′—X—苯酮的合成
短句来源
     Objective: To optimizate the preparation technology for 4-trihydro-two-benzophenone.
     目的 :优化 4—羟基苯酮制备工艺 ;
短句来源
     4. The capability of immobilized cell of R.
     4.R.
短句来源
     4) Root colonization and quantity of external hyphae by G.
     4)G.
短句来源
     二.
     .
短句来源
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  4 '-difluorobenzophenone
Exchange reactions that may proceed in the course of polycondensation during formation of a polymer from 4,4'-difluorobenzophenone and 4,4'-(isopropylidene)diphenol have been studied.
      
The nucleophilic substitution of the activated aryl halide in DMAA in the presence of potassium carbonate yields high-molecular-mass block copoly(arylene ether ketones) based on 4,4'-difluorobenzophenone and a number of bisphenols.
      
The proton conductivity of films based on sulfonated poly(arylene ether ketone) derived from bisphenol A and 4,4'-difluorobenzophenone of various modification degrees has been studied.
      
The Synthesis and Characterization of a Novel Ternary Polymer Bisphenol A-4,4'-Difluorobenzophenone-bis(p-hydroxylphenyl)-1,4,5,
      
PESEK was synthesised by the nucleophilic substitution reaction of 4,4'-difluorobenzophenone with dihydroxydiphenylsulfone using sulfolane as solvent and potassium carbonate as catalyst at 230?°C.
      
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The heterogeneity of interbipolycondensation product,polyetherket onesulfone(PEKS) has been evaluated quantitatively by determining the relative activity of two comonomers (γ)and contents of the units of two comonomer(CR,Cs). We find here the γ of DOS and DFK is 1. 97×10-8exp(9. 6×103/ T),CR.Cs are determined by 13C-NMR.The chain structure of PEKS is also characterized by illustrating average block length values (LR, Ls) in terms of portions of different triads(PRR,PRS.PSS).The microheterogeneities of a series...

The heterogeneity of interbipolycondensation product,polyetherket onesulfone(PEKS) has been evaluated quantitatively by determining the relative activity of two comonomers (γ)and contents of the units of two comonomer(CR,Cs). We find here the γ of DOS and DFK is 1. 97×10-8exp(9. 6×103/ T),CR.Cs are determined by 13C-NMR.The chain structure of PEKS is also characterized by illustrating average block length values (LR, Ls) in terms of portions of different triads(PRR,PRS.PSS).The microheterogeneities of a series of PEKS synthesised by different ratio of comonomers at different reaction temperature are studied by 13C-NMR and DSC , indicating that the chain structure is greatly influenced by the ratio of comonomers and reaction temperature. As Tg has a direct relation to the chain structure,this can be seen from the variation of Tg temperature.

测定两种共单体的相对活性(γ)和两种共单体的单位含量(C_R、C_S),可定量评价聚醚酮砜二元共缩聚的非均一性。发现二氯二苯砜(DDS)与二氟二苯酮(DFK)的相对活性为1.97×10~(-08)exp(9.6×10~3/T。由~(13)C-NMR测定了C_R、C_S。PEKS的链结构按不同的三个部分(P_(RR)、P_(RS)、P_(SS))的平均链段长度值(L_R、L_S)来表征说明。 在不同反应温度及共单体的不同比例,采用~(13)C-NMR和DSC研究了合成的一系列PEKS的微观非均一性,并指出共单体和反应温度对链结构影响很大,由T_(?)温度变化能看到链结构对T_(?)的直接影响。

4,4'—Difluorobenzophenon and 1,4—bis(4—fluorobenzoyl)benzene,monomers for aromaticpolyetherketone,are prepared by Friedel-Crafts reaction of fluorooenzene with CCl_4 and terephthaloyldichloride respectively.Yields(67% and 81%)and purities are high.Effects of temperature,solventand catalyst on the reactions are investigated.Furthermore,structures and purities of both compoundsare verified by melting point,element analysis,IR,H NMR and MS.

芳香族二氟代物是制备高性能高分子材料聚芳醚酮所需单体之一.本文以氟苯、四氯化碳和对苯二甲酰氯等为原料通过付一克酰化反应合成了两种高纯度的芳香族二氟代物:4,4′—二氟二苯酮和1,4—二(对氟苯甲酰基)苯,反应产率较文献值有大幅度提高,分别为67%和81%。本文还进一步探讨了各种反应条件对反应的影响,并通过熔点测定、元素分析、红外光谱(IR)、核磁共振谱(~1HNMR)和质谱(MS)等方法确证了这两种化合物的结构和纯度。

A novel biphenol monomer,1-hydroxy-4-(hydroxypheny)-phthalazine,was successfully synthesized.The poly (aryletherketone)can be readily prepared by the reaction of this monomer with 4,4'-defourodiphenylketone in appropriate condition.Its inherent viscosity is 0.25 ̄1.0.The polyketone is a very thermooxidatively stable polymer with surprisingly high glass transition temperature.The structure of the monomer and polymer were studied by NMR,IR and HPLC technique.The test sample were made by means of pressing plate.The...

A novel biphenol monomer,1-hydroxy-4-(hydroxypheny)-phthalazine,was successfully synthesized.The poly (aryletherketone)can be readily prepared by the reaction of this monomer with 4,4'-defourodiphenylketone in appropriate condition.Its inherent viscosity is 0.25 ̄1.0.The polyketone is a very thermooxidatively stable polymer with surprisingly high glass transition temperature.The structure of the monomer and polymer were studied by NMR,IR and HPLC technique.The test sample were made by means of pressing plate.The properties of the polyketone were tested and determined.It has been proved that the polymer has very high glass transition temperature (Tg=263℃),good electric property(ε=3.4),high strength(σy=104MPa) and satisfactory solubility.

成功地合成了一种新的双酚单体-1-羟基-4-(4-羟基苯基)二氮杂萘,并通过IR、DSC、1H-NMR、13C-NMR和高效液相色谱对其结构和纯度进行了研究。用此双酚单体与4,4′-二氟二苯酮反应,在适当的条件下可得到特性粘度为0.25~0.80的改性聚醚酮树脂,并用1H-NMR和13C-NMR对其结构进行了检测。性能测定样品由浇膜和模压方法制得,经测定,改性聚醚酮具有很好的热稳定性和很高的玻璃化温度(Tg=263℃),优良的机械性能(σy=104MPa)、粘附性和可溶解性。

 
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