英语翻译This paper describes the synthesis and characterization of aromatic diimide–diacids (DIDAS) obtained by reacting pyromellitic dianhydride (PMDA),4,40-oxo diphthalic anhydride (ODA),1,4,5,8-naphthalene tetra carboxylic dianhydride (NTDA)

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英语翻译This paper describes the synthesis and characterization of aromatic diimide–diacids (DIDAS) obtained by reacting pyromellitic dianhydride (PMDA),4,40-oxo diphthalic anhydride (ODA),1,4,5,8-naphthalene tetra carboxylic dianhydride (NTDA)

英语翻译This paper describes the synthesis and characterization of aromatic diimide–diacids (DIDAS) obtained by reacting pyromellitic dianhydride (PMDA),4,40-oxo diphthalic anhydride (ODA),1,4,5,8-naphthalene tetra carboxylic dianhydride (NTDA)
英语翻译
This paper describes the synthesis and characterization of aromatic diimide–diacids (DIDAS) obtained by reacting pyromellitic dianhydride (PMDA),4,40-oxo diphthalic anhydride (ODA),1,4,5,8-naphthalene tetra carboxylic dianhydride (NTDA) with excess of 4-aminobutyric acid (B) or 6-aminohexanoic acid (H) using N,Ndimethyl
formamide (DMF) as solvent.The synthesized compounds were used as curing agents to investigate the effect of structure on the curing and thermal behaviour of
diglycidyl ether of bisphenol-A (DGEBA).Structural characterization of DIDAS was done by using FTIR,1H-NMR,13C-NMR spectroscopy and elemental analysis.
Curing behaviour of DGEBA in the presence of aromatic DIDAS was investigated by differential scanning calorimetry (DSC).The peak exotherm temperature (TP) was
low in the case of DIDAS synthesized from ODA and high in the case of DIDAS synthesized from NTDA.Thermal stability of the isothermally cured DGEBA with DIDAS was investigated using dynamic thermogravimetry in nitrogen atmosphere.The char yield was highest for resin cured with DIDAS containing NTDA.
The structure of synthesized DIDAS was confirmed through EA,FT-IR,1H-NMR,and 13C-NMR characterization.The DIDAS based on ODA were more reactive than those based on PMDA.The curing temperature of exothermic transition depends on the structure of DIDAS.Ti,To,Tp and Tf were highest for the resin cured with EPB
and lowest with EOH.Higher char yields were obtained with epoxy resins cured with DIDAS based on ‘NTDA’ as compared to ‘ODA’ or ‘PMDA’ based DIDAS.The highest
char yield was observed in case of ENH/ENB and lowest with EOH/EOB.
The curing behaviour of diglycidyl ether of bisphenol-A (DGEBA) was investigated by the dynamic differential scanning calorimetry using varying molar ratios of aromatic imide-amines and 4,4’-diaminodiphenylsulfone (DDS).The imide-amines were prepared by reacting 1 mole of naphthalene 1,4,5,8-tetracarboxylic dianhydride (N) and 4,4’-oxodiphthalic anhydride (O) with 2.5 moles of 4,4’-diaminodiphenyl ether (E) or 4,4’-diaminodiphenyl methane (M) or 4,4’-diaminodiphenylsulfone (S) and designated as NE/OE or NM/OM or NS/OS.The mixture of the imide-amines and DDS at ratio of 0:1,0.25:0.75,0.5:0.5,0.75:0.25 and 1:0 were used to investigate the curing behaviour of DGEBA.
A single exotherm was observed on curing with mixture of imide-amines and DDS.This clearly shows that the two amines act as co-curing agents.Curing temperatures were higher with imide-amines having sulfone linkage irrespective of anhydride.Curing of DGEBA with mixture of imide-amines and or DDS resulted in a decrease in characteristic curing temperatures.The thermal stability of the isothermally cured resins was also evaluated using dynamic thermogravimetry in a nitrogen atmosphere.The char yield was higher in case of resins cured imide-amines based on N and E.
能不能把一些专业化学英语单词也翻译出来啊~

英语翻译This paper describes the synthesis and characterization of aromatic diimide–diacids (DIDAS) obtained by reacting pyromellitic dianhydride (PMDA),4,40-oxo diphthalic anhydride (ODA),1,4,5,8-naphthalene tetra carboxylic dianhydride (NTDA)
本文介绍了以N,N-二甲基甲酰胺(DMF)为溶剂,通过均苯四甲酸二酐(PMDA)、4-4′-氧二酞酸酐(ODA)、1,4,5,8-萘四酸二酐(NTDA)与过量4-氨基丁酸(B)或6-氨基乙酸(H)反应获得芳香族二酰亚胺-二元酸(DIDAS)的合成方法及其表征.研究了该合成物用作固化剂时其结构对双酚A二环氧甘油醚(DGEBA)固化性能及热力学性能的影响.运用傅立叶红外光谱、 1H-NMR,13C-NMR 光谱及元素分析仪对DIDAS的结构进行了表征.
运用差分扫描量热仪(DSC)研究了加入了芳香族二酰亚胺-二元酸(DIDAS)的双酚A二环氧甘油醚(DGEBA)的固化性能.加入由4-4′-氧二酞酸酐(ODA)合成的芳香族二酰亚胺-二元酸(DIDAS)的放热曲线最高温度(TP)低,而加入了由1,4,5,8-萘四酸二酐(NTDA) 合成的芳香族二酰亚胺-二元酸(DIDAS)的放热曲线最高温度(TP)高.在氮气保护气氛下运用动态热量分析法研究了用DIDAS固化的DGEBA的等温线的热稳定性.用含NTDA的DIDAS固化的树脂的焦化率最高.所合成的DIDAS的结构通过EA,FT-IR,1H-NMR及13C-核碰共振表征得以确认.基于ODA合成的DIDAS比基于PMDA合成的DIDAS活性要好.热过渡的固化温度取决于DIDAS的结构.用EPB固化的树脂的To,Tp 和Tf是最高的,而用EOH固化的树脂的To,Tp 和Tf是最低的.与用基于ODA’或‘PMDA’合成的 DIDAS相比,基于‘NTDA’合成的DIDAS固化环氧树脂,基焦化率可以达到更高.通过检测,有ENH/ENB的焦化率最高,有EOH/EOB的焦化率最低.
运用动态差分量热仪(DSC)研究了加入不同摩尔比的芳香二酰胺及4,4′-二氨基二苯砜(DDS)的双酚A二环氧甘油醚(DGEBA)的固化性能.酰亚胺通过1摩尔1,4,5,8-萘四酸二酐(N)和4-4′-氧二酞酸酐(O)与2.5摩尔4,4’-二胺联苯醚(E)或4,4’-二胺联苯烷(M)或4,4’-二胺联苯砜(S)制备,分别用NE/OE或NM/OM或NS/OS代替.分别用酰亚胺和DDS摩尔比为0:1,0.25:0.75,0.5:0.5,0.75:0.25 和 1:0的混合物研究了DGEBA的固化性能.
观察了用不同摩尔比的酰亚胺和DDS混合物进行固化的各个放热曲线.结果明两种胺起着共固化剂的作用.不考虑酐的情况,有砜的酰亚胺的固化温度要高.含酰亚胺和或DDS混合物的DGEBA的固化的特性固化温度有所降低.也用动态热量分析法研究了氮气保护气氛下固化树脂等温线的热稳定性.用基于N和E形成的酰亚胺固化的树脂的焦化率要高.

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