1,3-戊二烯-1-戊烯阳离子共聚反应

研究了ＡｌＣｌ３引发的１,３－戊二烯（ＰＤ）－１－戊（ＰＩ）阳离子共聚反应。在正已烷作介质的ＰＤ阳离子聚合体系中加入ＰＩ可抑制凝胶（交联聚合物）的生成,同时使聚合物总产率下降。随共聚单体中ＰＩ含量的增加,聚合物分子量先呈现上升,并在达到极大值后逐渐下降。在甲苯介质中ＡｌＣｌ３引发的ＰＤ阳离子聚合体系中加入ＰＩ使得聚合物产率呈现下降趋势,聚合物分子量仍随共聚单体ＰＩ含量的增加先呈现上升并在达到极大值     

第二讲激光视盘系统结构与原理(三)

第二讲激光视盘系统结构与原理（三）陈玉生编著九可选附件（一）控制扩展板（ＤＢ－２０１０）为了扩展基本功能，以便将像计算机数据／ＳＦＡ板和并行接口板（ＧＰＩＢ）这样的其它可选附件连接到ＬＤＰ－２０００系列视盘机，ＤＢ－２０１０是可选附件之一。控制扩展板...     

可溶性聚酰亚胺的合成与性能研究

采用“柔顺性”二胺单体４，４＇－二（４－氨基苯氧基）二苯砜与二氨基二苯砜及二苯甲酮四甲酸酐进行共缩聚并在高温溶液亚胺化合成了可溶于ＮＭＰ、ＤＭＡｃ、ＤＭＦ等强极性溶剂的可溶性聚酰亚胺，并发现在本研究体系中，单纯提高分子链柔顺性并不能很好地提高ＰＩ的可溶性，必须结合共缩聚方法以破坏分子链规整性，所得ＰＩ只有在４，４’－二（４－氨基苯氧基）二苯砜与二氨基二苯砜的摩尔比在３：７～６：４时才可溶。所得可溶性ＰＩ的特性粘度为０．２１～０．３８ｄｌ／ｇ（ＮＭＰ为溶剂，Ｔ＝３０℃），以ＤＳＣ测得的玻璃化转变温度在２５０～２９０℃，氮气中热分解温度在５００℃以上。     

烯基双酚A醚接枝LDPE的研究

介绍了烯基双酚Ａ醚（ＤＢＡＥ）在引发剂过氧化二异丙苯（ＤＣＰ）存在下，与低密度聚乙（ＬＤＰＥ）在Ｈａａｋｅ转矩流变仪的混炼器中进行熔融接枝反应的工艺。采用示差扫描量热仪（ＤＳＣ）、红外光谱（ＦＴ－ＩＲ）分析了接枝共聚反应和证实了接枝共聚物ＬＤＰＥ－ｇ－ＤＢＡＥ的结构。并通过正交实验及数据分析，确定了合成ＬＤＰＥ－ｇ－ＤＢＡＥ的最佳工艺条件。     

改性PAmA—PI渗透蒸发膜促进酯化以应的研究

本文以聚酰胺羧酸（ＰＡｍＡ）为膜材料，研制了具有耐溶剂性、耐温性和机械性能稳定的聚酰亚胺（ＰＩ）渗透蒸发均质膜，同时以二元羧酸为改性剂，对ＰＡｍＡ－ＰＩ膜材料进行化学改性，从而调节膜的溶解选择性和扩散选择性，在此基础上，将改性的膜应用到乙酸异戊酯的合成反应中，通过对抑制反应的水的连续分离，破坏了化学反应平衡，使反庆向生成酯的方向移动，获得了良好的结果。     

几种共聚醚酰亚胺的H2／N2分离性能

合成了一系列双醚二酐（ＨＱＤＥＡ）型共聚醚酰亚胺，研究了它们的Ｈ２／Ｎ２分离性能。刚性二胺单体的引入可明显降低聚醚酰亚胺的链段活动性，改善Ｈ２／Ｎ２分离性能。３０℃时，ＨＱＤＥＡ－ＭＤＡ／ＤＡＢ（８０／２０）和ＨＱＤＥＡ－ＭＤＡ／ＴＤＡ（８０／２０）的透Ｈ２系数分别比均聚物ＨＱＤＥＡ－ＭＤＡ高２４％和１５％，Ｈ２／Ｎ２分离系数分别比ＨＱＤＥＡ－ＭＤＡ高９％和３０％。     

二胺改性BPDA—ODA型聚酰亚胺的H2／N2分离性能

本文合成了一系列二胺改性的ＢＰＤＡ－ＯＤＡ型共聚酰亚胺膜，改性聚酰亚胺与未改性的ＢＰＤＡ－ＯＤＡ相比，透气性得到了明显的改善，改善的程度与第二种二胺单体的结构和用量有关。３０℃时，在ＢＰＤＡ－ＯＤＡ中加入２０ｍｏｌ％三甲基间苯二胺（３ＭＰＤＡ）或四甲基对苯二胺（４ＭＰＤＡ）时，共聚酰亚胺ＢＰＤＡ－ＯＤＡ／３ＭＰＤＡ（８０／２０）或ＢＰＤＡ－ＯＤＡ／４ＭＰＤＡ（８０／２０）的透Ｈ２系数和Ｈ２／Ｎ２分     

含氨酯键双马来酰亚胺的合成反应和性能研究

本文以糠醇Ｎ－苯基马来酰亚胺，２，４－甲苯二异氰酸酯（２，４－ＴＤＩ），甲苯二异氰酸酯（ＴＤＩ－２０／８０），六次甲基二异氰酸酯（ＨＤＩ）和二苯甲烷双马来酰亚胺（ＢＭＩ）为原料，研究并确定了经由Ｄｉｅｌｓ－Ａｌｄｅｒ反应合成含氨酯键双马一为酰亚胺的合成路线和工艺条件，制备了两种含不同氨酯键结构的新型双马来酰亚胺ＢＭＵ－Ｈ和ＢＭＵ－Ｔ。实验结果表明，采用Ｄｉｅｌｓ－Ａｌｄｅｒ反应合成含氨酸键双马来酸     

水稻中一种抗真菌蛋白的分离与特性分析

从萌发的水稻种子中分离并纯化了一种能抑制多种病原真菌生长的蛋白（简称为ＲＡＦＰＩ），在马铃薯葡糖琼脂培养基上，２０μｇＲＡＦＰＩ可明显抑制木霉（Ｔｒｉｃｈｏｄｅｒｍａｒｅｅｓｅｉ）菌丝的生长，此蛋白还具有较广的抗真菌菌谱，其分子量为１６．５９ＫＤ，等电点为８．７，组成成分中富含Ｐｒｏ、ＧｌＸ和Ａｓｘ，经测序得到了其Ｎ端２０个氨基酸序列。     

共缩聚醚酯聚酰胺亚胺的合成和性能研究

用对－氨基苯甲酸酯封端的聚（四次亚甲基）醚（ＡＰＴＭＯ），４，４－二氨基二苯酰胺（ＤＡＢＡ）及均苯四甲酸二酐（ＰＭＤＡ），利用溶液聚两步法合成了一系列不同硬段含量的共缩聚醚酯聚酰胺亚胺。用动态力学分析（ＤＭＡ）、示差扫描量热（ＤＳＣ）研究了样品的热性能和相态结构，用热重分析（ＴＧＡ）和应力－应变试验测定了材料的热稳定性能和力学性能。结果表明，共缩聚醚酯聚酰胺亚胺具有两相结构，有良好的力学性能和热稳     

明胶改性聚酰胺酸的合成与表征

通过明胶链上的-NH_2与低分子酸酐封端的聚酰胺酸链端酸酐首先在较高温度下缩合反应生成改性预聚体,然后再对改性预聚体扩链,得到明胶改性聚酰胺酸.通过测定明胶改性聚酰胺酸的特性黏度,研究了改性预聚体反应阶段不同反应条件对聚合物特性黏度的影响,同时采用红外光谱和示差扫描量热测定了明胶改性聚酰胺酸的结构与热性能.结果表明,在改性预聚体合成阶段,当明胶用量为35%、反应温度为40℃和反应时间为25min时,明胶改性聚酰胺酸的特性黏度最大.经过明胶改性,改变了聚酰胺酸的结构,使其化学亚胺化薄膜的玻璃化温度比聚酰胺酸化学亚胺化薄膜的降低39℃.     

Unidirectional Fracturing of Super Engineering Plastic Films

Polyamideimides and polyimides are prepared based on chemical imidization using aromatic diamine, diacid anhydride, and diacid chloride as monomers, with the precursor polyamic acid remaining in part, to produce mechanically unique films through convection drying. The resulting films are colorless and transparent and exhibit unidirectional fracture behavior. These films do not break when bent in the direction of the air contact surface but easily break when bent in the opposite direction. A cross-sectional electron microscope image of the broken film shows that the film consists of a double layer. After examining both sides of the film through various spectroscopic and gel permeation chromatography analyses, it is found that the residual polyamic acid undergoes both hydrolytic and thermal decomposition, exclusively on the air contact surface. Later, the polymer film is laminated with two sheets of glass through UV curing of commercial acryl resin. Because of the unidirectional fracture characteristics of the film, the laminated glass does not completely break when subjected to bending toward the air contact surface but easily breaks (without fragments) in the opposite direction, indicating its potential application in safety glasses suitable for emergency escapes.     

可溶性PI／SiO2纳米复合材料中SiO2微相结构变化的研究

选取可溶性聚酰亚胺（PI）作为有机高聚物基本，通过正硅酸四乙酯（TEOS）在聚酰胺酸（PAA）的N－甲基－2－毗咯烷酮（NMP）溶液中进行溶液－凝胶反应,制备出新型的聚酰亚胺／二氧化硅（PI／SiO2)纳米复合材料，并用UV－Vis-FT-IR,SEM和光子相关法等对其溶胶－凝胶转变过程，二氧化硅微相结构的变化进行了研究，并对溶中粒子间的团聚行为作了进一步探讨，结果表明随着处理温度的升高，PAA逐步亚胺化，同时TEOS水解后的硅烃基（Si-OH)逐步缩合，由线型结构向环状结构过渡，原位生成SiO2凝胶网络，实验结果还发现热处理温的升高对二氧化硅元化粒子的尺寸无明显的影响，而光子相关法结果则表明颗粒表面活性Si-OH的存在是引起团聚的一个重要因素。     

Facile and efficient route to polyimide-TiO2 nanocomposite coating onto carbon fiber

Polyamic acid-TiO(2) hybrid colloid emulsion with an average particle size of 200 nm was formed by dispersing nano-TiO(2) into polyamic acid colloidal emulsion. The polyimide-TiO(2) nanocomposite was coated onto carbon fiber by electrophoretic deposition. The primary properties of polyamic acid-TiO(2) hybrid colloid emulsion and polyimide-TiO(2) nanocomposite coating onto carbon fiber were characterized using laser scattering, ZetaPlus particle sizing, transmission electron microscopy, field-emission scanning electron microscope, Fourier transforms infrared spectroscopy, and X-ray Diffraction analysis. The results indicated that the small amount of nano-TiO(2) would be effectively dispersed in polyamic acid colloidal particles. The polyimide-TiO(2) hybrid nanocomposite coating carbon fiber sheet displayed an excellent photodegradation performance of methyl orange, which could be degraded more than 70 wt % after 10 cycles.     

Surface properties of aromatic polymer film during thermal treatment

Aromatic polyimide films are processed from polyamic acid solutions. This process involved the simultaneous loss of solvent and chemical conversion of polyamic acid to polyimide, and implied structural reorganization which led to changed physical properties. Polymer films generated from benzophenonetetracarboxylic dianhydride and 4,4′-diamino-3,3′-dimethyl diphenylmethane have been investigated at different stages of thermal treatment. The surface polarity, which was determined by the presence of polar COOH and CONH groups, changed during polyamic acid thermal treatment. These polar groups were removed step by step by imidization process leading to the modification of the physical properties of the polymer film.     

Formation of Cu or Cu2O nanoparticles embedded in a polyimide film for nanofloating gate memory

Cu and Cu2O nanoparticles were fabricated in polyimide by curing the stacked polyamic acid/Cu/polyamic acid on Si wafer and post heat treatment. Nanoparticle distribution in polyimide (a monolayer of vertically aligned nanoparticles or the randomly dispersed nanoparticles) can be controlled by changing the reactivity of Cu with PAA and curing atmosphere. About 6-7 nm sized Cu or Cu2O nanoparticles were observed in the polyimide film. The capacitance-voltage curves were measured with Al/particles in polyimide/p-Si(100) specimens at 300 K, and the capacitance hystereses were observed at different sweep voltage ranges, which indicates that Cu2O or Cu nanoparticles can be utilized in next generation flash memories.     

High temperature resistant properties of polyimide coated optical fibre

Optical fibres were coated with polypyromellitimide (PPM) using their precursor polyamic acid to study the application of optical fibres at elevated temperatures. Normally optical fibres can withstand temperatures in the range of 100–200°C but our studies have indicated that optical fibre coated with PPM can easily withstand temperatures up to 400°C without any loss. Interaction of silica with polyamic acid has been suggested with the formation of water and thus it is presumed that damaging hydrogen is not being formed. Characterization of the coated optical fibre has been done with the help of FT-IR and TG analysis.     

煤制芳烃项目工艺技术的选择

对煤制芳烃项目工艺技术从煤气化、变换、净化、合成气制甲醇、甲醇制芳烃（MTA）、对苯二甲酸（PTA）各工序可选择的国内、外工艺技术进行了介绍，了解煤基芳烃产业链相关情况：     

棉秸秆活性炭吸附水溶性有机污染物研究

以棉花秸秆为原材料,采用"炭化-活化"工艺制备了高活性活性炭。研究了活性炭对苯酚、苯胺和苯甲酸等3种芳香族有机污染物的吸附过程动力学及热力学;测定了不同温度下该活性炭对3种污染物的吸附等温线。研究结果表明棉秸秆活性炭对苯酚、苯胺和苯甲酸的吸附过程均符合Lagergren二级吸附动力学方程;表观吸附活化能分别为Ea(苯酚)=15.91kJ/mol、Ea(苯甲酸)=12.56kJ/mol、Ea(苯胺)=11.16kJ/mol;吸附过程为自发的放热熵减过程;吸附等温模型符合Freundlich等温式;棉秸秆活性炭对苯酚、苯胺和苯甲酸的静态饱和吸附容量分别为450、321和298mg/g。棉秸秆活性炭制备简便、成本低廉,对水溶性有机污染物去除效果较好,可用于芳香族有机污染物的吸附治理。     

Influence of Crystal Properties on Powder Flow Behavior of an Aromatic Amine and L-Glutamic Acid

Polycrystalline particles with a roughly spherical shape (spherulites) have been identified in the industrial production of an aromatic amine derivative, where powder handling is one of the downstream processes following crystallization. This comparative study focuses on how uniaxial flow functions as measures of flowability of dry material of L-glutamic acid and an aromatic amine are affected by the crystal morphology and size, as analyzed by the chord length distribution measurements (FBRM) and scanning electron microscopy (SEM). L-glutamic acid was chosen as a model substance since it can be crystallized as spherulites as well as needle-shaped and polyhedral particles. Failure strength values were measured as a function of consolidation stress using the uniaxial tester. The failure strength values of L-glutamic acid were found to be lower for polyhedral particles than for needle-shaped particles with approximately the same mean chord length. Needle-shaped particles were found to have lower values for failure strength than L-glutamic acid spherulites with smaller chord lengths. It has been shown that spherulites are more unstable with respect to particle breakage than the other morphologies. Although the chord length distributions of the L-glutamic acid spherulites were shifted towards smaller values than those of the aromatic amine spherulites, the failure strength of the aromatic amine particles is more than four times as large. This can be explained by more extensive particle breakage during filtration, sample storage, and consolidation of the aromatic amine.