N-[4-(N′-取代酰胺基)苯基]马来酰亚胺的合成与表征

N-取代马来酰亚胺(RMI)是一类重要的新型树脂改性单体,由于其具有刚性五元环的结构,能显著提高聚合物的玻璃化温度和热分解温度,改善材料的工艺性和力学性能[1-9]。但文献对于在N-取代基团中引入杂环结构的单体合成报道很少。本文报道了由顺丁烯二酸酐、8-氨基喹啉、对甲苯胺为主要原料合成N-[4-(N′-8-喹林基)苯甲酰胺基]马来酰亚胺(QPM)和N-[4-(N′-4-甲基苯基)苯甲酰胺基]马来酰亚胺(TPM)的方法,并对产物进行了元素分析和1H-NMR、FT-IR表征。同时,由于8-氨基喹啉具有与8-羟基喹啉类似的结构,能表现出较好的光学性能[10,11],以N…     

聚[N-(4-二甲氨联苯基)马来酰亚胺]单体的合成及其聚合

N-取代的马来酰亚胺是缺电子的负性单体[1],它很容易进行自由基聚合或共聚合[2,3],特别是能够与负性单体如丙烯腈共聚合[4].如果在缺电子的N-取代马来酰亚胺单体中引入给电子生色基团,即给电子生色基团与受电子基团于一体,能够表现出较好的光化学性能[5].本文中报道了聚[N-(4-二甲氨联苯基)马来酰亚胺]及其单体的合成,聚合物的光化学性能将在另文报道.     

苯乙烯与N-对位取代苯基马来酰亚胺的乳液共聚

合成了苯乙烯(St)与 N-对位取代基马来酰亚胺的3种二元共聚物乳液.在苯乙烯与N-对位取代苯基马来酰亚胺(N-p-RPhMI)的最大共聚比内,通过种子滴加乳液聚合制得高稳定性、高固含量(40%)、低粘度的共聚物乳液.研究了 N-p-RPhMI 苯环对位上取代基团对共聚物乳液的性能以及共聚物热性能影响.结果表明:N-p-RPhMI 的加入提高了乳液的产率,并且随着取代基团极性的增强,乳液产率提高,乳胶粒的平均粒径增大,乳液的表观粘度降低;共聚物的热分解温度随着取代基团极性的增加而提高,但取代基极性对共聚物的玻璃化转变温度(Tg)的影响明显.同时,St/N-对甲氧基马来酰亚胺(N-p-MOPhMI)体系中助溶剂的加入对共聚物乳液性能影响很大,使共聚物的热起始分解温度升高,但对共聚物的 Tg 基本无影响.     

N-(4-羟基苯基)马来酰亚胺的合成及其光谱分析

利用对氨基酚和马来酸酐反应制取N-(4-羟基苯基)马来酰亚胺(HPM),并采用红外光谱及核磁光谱对其结构进行了表征.研究了HPM在甲醇、四氢呋喃及二氯甲烷3种溶剂中的紫外光谱.结果发现,在这3种溶剂中,HPM在210～250 nm范围内的吸收峰对溶剂极性及溶液浓度敏感;而275 nm左右的吸收峰在各种极性不同溶剂中位置...     

N－（4－烯丙氧基苯基）马来酰亚胺的合成

Ｎ－取代马来酰亚胺与双马来酰亚胺的混合物可制备耐热性高、工艺性好的热固性高分子材料。本文通过对氨基酚与乙酸肝的反应，再通过酚羟基的醚化反应和乙酰氨基的水解反应，并与顺丁烯二酸酐进行酰亚胺化成环反应，合成并鉴定了标题化合物。     

N-对位取代苯基马来酰亚胺与苯乙烯溶液共聚动力学的研究

以DMF为溶剂 ,采用膨胀计法对N 对位取代苯基马来酰亚胺与苯乙烯的溶液共聚动力学作了系统研究 .其中N 苯基马来酰亚胺与苯乙烯的均相溶液聚合 ,聚合速率方程为Rp=k[I]1/ 2 [M ].同时还测定了四种N 对位取代苯基马来酰亚胺与苯乙烯在DMF中的共聚表观活化能 ,并由此证明四种单体的共聚活性及CTC络合物的存在     

N-取代马来酰亚胺和苯乙烯的原子转移自由基共聚合

近来,以卤代烷、铜（Ⅰ）卤素盐和２,２ 联吡啶体系引发苯乙烯可进行活性聚合,即原子转移自由基聚合（ＡＴＲＰ）,得到指定分子量和窄分子量分布的聚合物［１］,开辟了活性聚合的一个新领域,引起了广泛的关注．利用ＡＴＲＰ方法,对合成较窄的分子量分布的均聚物...     

N-取代苯基马来酰亚胺合成的1H-NMR研究

采用核磁共振氢谱对合成的N-取代苯基马来酰亚胺系列产物和反应过程的跟踪表征．通过研究产物和反应过程混合物的碳碳双键上质子、苯环上质子的化学位移和强度变化，判断反应进行程度．同时还研究了取代基对反应产物和中间产物的碳碳双键质子和苯环质子偶合常数的影响．     

N-苯基马来酰亚胺与环己烯共聚物的制备和表征

Ｎ苯基马来酰亚胺（ＰＨＭＩ）是一种很有应用价值的共聚单体,它能赋予共聚物很好的耐热性．有关ＰＨＭＩ与甲基丙烯酸甲酯、苯乙烯及乙烯基醚的二元共聚合反应已有文献报道［１～３］．而有关ＰＨＭＩ与环烯烃特别是环己烯的共聚合研究除我们所做的工作外［４］,报道甚少．作者研究了ＰＨＭＩ与环己烯在溶液中的二元共聚合反应,并对所得的共聚物进行了表征．１　原料ＰＨＭＩ,自制,ｍ．ｐ．８８－７℃;元素分析Ｃ,６９－３３;Ｈ,４－０７;Ｎ,８－１０;理论值Ｃ,６９－３６;Ｈ,４－０７;Ｎ,８－０９,１ＨＮＭＲ（δ）…     

(ArO)2Sm(THF)4催化N-苯基马来酰亚胺聚合

发现二价稀土配合物二 ( 2 ,6 二叔丁基 4 甲基苯氧基 )钐 [(ArO) 2 Sm (THF) 4]能较好地引发N 苯基马来酰亚胺 (N PMI)的聚合 ,溶剂对聚合的影响较大 ,在四氢呋喃中聚合转化率最高 ,且聚合转化率随单体浓度的提高而提高 ,而温度对聚合的影响不大。     

Syntheses and thermostabilities of N-[4-(N′-substituted aminocarbonyl)phenyl]maleimide polymers

Three types of novel N-[4-(N′-substituted aminocarbonyl)phenyl] maleimide (RPhMI: N-substituent (R) = phenyl, cyclohexyl, and cyclododecyl) were synthesized and homopolymerized under several conditions. In the copolymerizations of RPhMI (M₁) with styrene (ST; M₂) or methyl methacrylate (MMA; M₂), monomer reactivity ratios and Alfrey-Price Q, e values were determined. All homopolymers decomposed without softening and melting points. The initial degradation temperatures (T_d) of poly(RPhMI)s were over 320°C. The glass transition temperatures (T_g) of RPhMI copolymers were much higher than those of N-phenylmaleimide (PhMI)–ST, PhMI–MMA, N-cyclohexylmaleimide (CHMI)–ST, and CHMI–MMA copolymers. Thermal stability of the terpolymers of RPhMI with ST and acrylonitrile (AN) was higher than that of ST–AN copolymers, i.e., AS resin. © 1998 John Wiley & Sons, Inc. J. Polym. Sci. A Polym. Chem. 36: 2001–2012, 1998     

[4-(4-苯甲酰基苯氧基)苯]苯基碘鎓六氟磷酸盐的合成

紫外光固化反应分为自由基固化机理、阳离子固化机理,以及自由基-阳离子混杂固化机理。自由基-阳离子混杂固化是指在同一体系里同时发生自由基光聚合反应和阳离子光聚合反应[1],结合了前两类聚合反应的优点,表现出很好的协同效应[2]。[4-(4-苯甲酰基苯氧基)苯]苯基碘鎓六氟磷酸     

Spectrofluorimetric determination of thiols by use of N[P-(2-benzoxazolyl)phenyl]maleimide

The weak fluorescence of N-[P-(2-benzoxazolyl)phenyl]maleimide (BOPM) can be greatly enhanced by thiol-containing compounds. A sensitive and simple spectrofluorimetric method based on the use of BOPM has been developed for the determination of thiols such as cysteine (Cys) and reduced glutathione (GSH). Calibration plots were linear in the concentration range from 0 to 1.6 x 10(-7) mol L(-1) for Cys and 0 to 1.7 x 10(-7) mol L(-1) for GSH. The detection limits (3a) were 2.36 x 10(-10) mol L(-1) for Cys and 1.49 x 10(-10) mol L(-1) for GSH. Many other amino acids (present at 100-fold greater concentrations) did not interfere with the determination. The proposed method has been used for the determination of Cys in protein hydrolysate and cystine electrolyte or GSH in serum, with recoveries of 95.4-103.7%.     

Synthesis and characterization of soluble polyamides based on 2,2-bis[4-(4-aminophenoxy)phenyl]hexafluoropropane and 2,2-bis[4-(4-aminophenoxy)phenyl]propane and diacid chlorides

Aromatic soluble polyamides and copolyamides having hexafluoroisopropylidene and isopropylidene moieties in the molecular structure of polymer chain were prepared by reacting the aromatic diacid chlorides and fluorine or nonfluorine containing aromatic diamines using low-temperature polycondensation process. Polymers were produced with high yield and moderate to high inherent viscosity. All polyimides and copolyamides showed thermal stability above 440°C and glass transition temperature above 200°C. Some of the polyamides were cast into transparent bulk films which were further characterized by mechanical, x-ray, and water absorption analysis. Fluoro polyamides showed superior structural properties as compared to nonfluoro polyamides. © 1996 John Wiley & Sons, Inc.     

Stereochemical studies of 5-methyl-3-(substituted phenyl)-5-[(substituted phenyl) hydroxy methyl]-2-thiooxazolidin-4-ones

The synthesis and stereochemical aspects of the aldol products, 5-methyl-3-(substituted phenyl)-5-[(substituted phenyl) hydroxy methyl]-2-thiooxazolidin-4-ones, are discussed.     

4-(对取代苯基)-2-[2-(取代苯基)呋喃-4-甲酰胺]-1',3',4'-均三唑[1,2-d]-1,3,4-噻二唑类衍生物的合成和生物活性

以1-氨基-5-巯基-2-(对取代苯基)-1,3,4-均三唑和5-取代苯基-2-呋喃甲酰异硫氰酸酯为原料, 合成了10个未见文献报道的含苯环连呋喃的均三唑并噻二唑类衍生物, 通过元素分析, ¹H NMR, IR和MS确定化合物的结构, 初步生物活性测试表明标题化合物具有一定的除草活性.