耐高温单组分环氧胶粘剂的制备

以3,3’-二氨基-4,4’-二羟基联苯（DADHBP）、2,2-双[4-（4-氨基苯氧基）苯基】丙烷（BAPOPP）、3,3’,4,4’-四羧基二苯醚二酐（ODPA）为主原料合成了合酚羟基的聚酰亚胺树脂（HPI）;以HPI为耐高温增韧剂,与N,N,N’,N’-四缩水甘油基-4,4’-二氨基二苯甲烷（TGDDM）、固化剂等配制了综合性能优异的耐高温单组分环氧胶粘剂。     

氨解法制备的Ti(C、N)粉末及其性能

介绍了氨解法制备Ti（C、N）的合成过程。论述了热解温度及热解气氛对Ti（C、N）粉末的组成、比表面积和粒度等性能的影响，并对制得的Ti（C、N）粉末的特性进行了研究。     

相转移催化合成N,N,N',N'-四甲基二氨基二苯基甲烷

本文利用TEBAC作为相转移催化剂合成了N，N，N’，N-四甲基二氨基二苯基甲烷（MBDA）。考察了催化剂的用量，反应时间、反应温度等因素对反应结果的影响，得出了最佳反应条件。     

N,N＇-双（3-甲基苯基）-N，N’-二苯基联苯胺的合成

以二苯胺为起始原料，经两步反应合成了有机电致发光材料N,N‘-双（3-甲基苯基）-N，N’-二苯基联苯胺(TPD)。通过优化实验得到最佳的合成工艺为：二苯胺在20℃下，，以V(冰醋酸)：V(水)=l：4为溶剂，加入重铬酸钾进行反应得N，N’-二苯基联苯胺，分离提纯后，再加入18-冠-6相转移催化剂，以邻二氯苯为溶剂在氮气保护下与间碘甲苯进行乌尔曼反应，在200℃下反应20h，产物经柱层析和重结晶提纯。TPD收率为85％，较文献提高5％，w(TPD)=99．92％。并用元素分析、红外光谱和核磁共振对产物的结构进行了表征。     

一种1，2-双-（2-氨基苯氧基）-乙烷-N，N，N＇，N＇-四乙酸衍生物的合成研究

以4-二甲基氨基吡啶（DMAP）和碳化双（环己基亚胺）（DCC）催化酰化反应,合成了一种1,2-双-（2-氨基苯氧基）-乙烷一N,N,N＇,N’-四乙酸和谷氨酸二甲酯的缩合物,并采用波谱学方法对反应产物进行了结构鉴定。     

N,N,N',N'-四(3-氨基丙基)乙二胺合成和表征

利用乙二胺和丙烯腈的亲核加成反应合成了一种新型有机多腈N,N,N’,N’-四（2-氰基乙基）乙二胺。在Raney Ni存在下对N,N,N’N’-四（2-氰基乙基）乙二胺进行催化加氢,得到N,N,N’N’-四（3-氨基丙基）乙二胺。并用红外、核磁、质谱等对N,N,N’N’-四（3-氨基丙基）乙二胺进行了表征,结果表明所合成的化合物即为标题化合物。     

混合模板法低成本合成SSZ-13分子筛的研究

以硅溶胶、硫酸铝、氢氧化钠和去离子水为原料,以N,N,N-三甲基金刚烷氢氧化铵和三乙胺为模板剂,采用传统的水热法快速合成了SSZ-13分子筛。采用X射线荧光光谱（XRF）、X射线衍射（XRD）和扫描电镜（SEM）表征产物。综合考察了碱度、水量、模板剂和晶种等因素对合成SSZ-13分子筛的影响,确定了最佳合成条件。在有晶种或无晶种条件下,通过引入辅助模板剂三乙胺,晶化2 d即可得到SSZ-13分子筛。该方法缩短了生产周期,降低了生产成本,具有广泛的工业应用前景。     

硬质PVC型材专用料生产技术开发(CPE改性PVC专用料的合成)

本文采用悬浮溶胀法进行抗冲改性剂氯化聚乙烯（CPE）与氯乙烯（VC）接枝共聚，合成硬质PVC型材专用树脂，研究了接枝共聚工艺、配方以及对聚合过程和产物结构的影响规律，为工业化提供了基础。     

N,N'-二四唑胺和邻菲啰啉与碱土金属钙、锶混配配合物的合成与表征

以N,N’－二四唑胺（C2H3N9）和邻菲哕啉（C12H8N2）为配体合成碱土金属Ca,Sr的含能配合物,并对配合物进行了基础的物化表征。化学分析和元素分析确定配合物的组成为Ca（C2HN9）（C12H8N2）：（H2O）。（1）和Sr（C2HN9）（C12H8N2）2（H2O）2（2）。溶解性实验表明,常温下配合物难溶于水加热时溶解,且不溶于甲醇、乙腈等有机溶剂。红外光谱分析表明,配体邻菲啰啉以双齿螯合形式与中心离子配位,配体N,N’－二四唑胺中N原子参与了配位。TG—DTG热分析显示配合物在氮气气氛、研究温度范围内有三个热分解过程,最终分解产物可能分别为以CaO与SrO为主的混合物。     

N,N＇-二联己基吡咯烷酮的制备及芳烃抽提性能

采用γ-丁内酯（简称酯）与己二胺（简称胺）合成N,N＇-二联己基吡咯烷酮，其沸点为440~450 ℃。通过优化实验得到最佳反应工艺条件为：酯与胺物质的量比2.5:1，反应温度280 ℃，反应时间2 h，产率可达76.22%。产物纯化后进行了GC-MS、1HNMR、IR、元素分析等表征，证实产物确为N,N＇-二联己基吡咯烷酮。对N,N＇-二联己基吡咯烷酮的芳烃抽提性能进行了初步研究，通过绘制溶剂-甲苯-正辛烷三元平衡相图证明，N,N＇-二联己基吡咯烷酮具有优良的芳烃选择性和良好的溶解性。考察了不同抽提温度下，N,N＇-二联己基吡咯烷酮的芳烃抽提性能，结果表明，随着抽提温度的升高，N,N＇-二联己基吡咯烷酮对芳烃抽提的选择性下降，溶解性上升，但总体变化不大，溶剂性能比较稳定，用作重整汽油及柴油芳烃抽提溶剂具有一定可行性。     

Influence of post-curing temperature on the structure,properties, and adhesion of vinyl ester adhesive

Vinyl ester (VE) resins are widely used as thermoset adhesives in structural joints and composites, but complete curing under environmental conditions is not produced. The existing literature dealing with the effect of post-curing on the structure, viscoelastic, mechanical, and adhesion properties of VE resin is scarce. Therefore, in this study, VE resin was subjected to different post-curing temperatures (50–140 °C) for one hour, and the changes in structure and properties were assessed. The degree of cross-linking of the VE resin depended on the post-curing temperature and cure started to be completed above 100 °C, a temperature close to the glass transition temperature (115 °C) of the completely cross-linked polymer. Furthermore, gel formation in VE resin was evidenced for post-curing temperature below 100 °C. In order to fully cross-link the VE resin, post-curing at 140 °C for one hour was necessary, and it was evidenced by an increase in the glass transition temperature and in the mechanical properties; an increase in adhesion to cold rolled steel was obtained although the shear strength was lower than in the joint produced with the non-post-cured VE resin.     

小口径连续缠绕管道用乙烯基酯树脂研究

对乙烯基酯树脂(MFE711W型)作为树脂基体制作的小口径连续缠绕玻璃钢管道的工艺性能、玻璃钢(FRP)力学性能、耐腐蚀性能进行了研究,与不饱和聚酯树脂及乙烯基树脂/不饱和树脂混合树脂(UP/VE)进行力学性能、防腐蚀性能对比,证明MFE711FW在小口径连续缠绕管道应用上的优越性。连续缠绕工艺采用钴/过氧化甲乙酮体系,常温固化,解决了乙烯基酯树脂活性低,不适用于快速成型工艺的缺陷。     

On the curing of a vinylester-urethane hybrid resin

Curing kinetics of a vinylester-urethane hybrid (VEUH) resin consisting of vinylester resin (VE) diluted in styrene and novolac type polyisocyanate (NPI) have been studied by differential scanning calorimetry (DSC). As VEUH is crosslinked via free radical polymerisation between the vinyl functions of styrene and VE, and polyaddition reaction between the secondary -OH groups of VE and -NCO of NPI, it was necessary to study these reactions separately. This was achieved by studying the curing with and without incorporating the NPI. The curing reaction was monitored by measuring the heat of reaction under isothermal and dynamic temperature conditions. Models describing the curing were developed, which are in good agreement with the experiments. A comparison between the curing of the VEUH and the VE resin without NPI leads to the conclusion that the curing of the VEUH as accessed by DSC is dominated by the radical polymerisation of styrene with VE although the two reactions are not time separated.     

界面粘结对GF/VE复合材料在硫酸介质中耐蚀性能的影响

本文采用实验室模拟环境因素加速老化的方法,比较了两种界面粘结性能不同的防腐容器用玻璃纤维增强乙烯基酯树脂复合材料(GF/VEA,GF/VEB)在硫酸介质中的吸湿特性以及动态和静态力学性能的变化。结果表明,在55℃、40wt%的硫酸水溶液中,两种树脂的吸湿性能相差不大,但界面粘结情况的不同使两种复合材料的吸湿特性表现出明显差别;两种复合材料的弹性模量(E′)、剪切强度和弯曲性能均随浸泡时间的延长而下降,且GF/VEB材料因具有较好的界面粘结而呈现较高的性能保留率。     

The effect of dispersants on the tensile properties of carbon nanotube/vinyl ester composites

The effects of eight different dispersants on the stability of multiwalled carbon nanotubes (MWCNTs) in vinyl ester (VE) resin systems have been systematically analyzed. Suspensions incorporating different amounts of dispersants relative to the concentration of MWCNTs in the VE have been prepared. The resistance to sedimentation of MWCNTs in the resin was investigated by using a centrifugation technique. One dispersing agent (B60H) was found to impart long‐term stability to suspensions of MWCNTs in VE. VE‐based composites reinforced with MWCNTs were prepared using different amounts of the dispersing agent. Tensile tests were performed to analyze the effect of different concentrations of MWCNTs and the use of the dispersing agent in the composites. Fracture surfaces of VE nanocomposites have been analyzed using scanning electron microscopy (SEM) to elucidate the reinforcing effect of the CNTs. POLYM. COMPOS., 2012. © 2012 Society of Plastics Engineers     

Simultaneous effects of silanized coal fly ash and nano/micro glass fiber on fracture toughness and mechanical properties of carbon fiber‐reinforced vinyl ester resin composites

In this study, the simultaneous effects of both silanized coal fly ash (S‐CFA) and nano/micro glass fiber (nGF) on fracture toughness and mechanical properties of vinyl ester (VE) resin filled with carbon fiber‐based composite materials were investigated. The CFA was treated with (3‐trimethoxysilyl) propyl methacrylate to introduce the methacryloxy groups into the surface of CFA, and was confirmed by using FTIR technique. The nGF and S‐CFA with different weight ratios were well mixed with VE resin by using of high‐speed mechanical stirrer, and ultrasonic technique before using as matrices for fabrication of carbon fiber‐based composite materials via sheet molding compound (SMC) method and hot curing processing. Many characteristics of both cured VE resin composites and carbon fiber‐based composite were examined such as mechanical properties, fracture toughness, and morphology. The results showed that by adding of both 0.1 wt% nGF and 1 wt% S‐CFA into VE resin the tensile strength, tensile modulus, flexural strength, K_IC, impact strength as well as the Mode I interlaminar fracture toughness (G_IC) of VE composites and carbon fiber based composites get optimum values and increased about 61.39%; 39.83%; 36.21%; 103.1%; 81.79%; 48.61%, respectively when compared with pristine materials. POLYM. ENG. SCI., 59:584–591, 2019. © 2018 Society of Plastics Engineers     

Effect of α-methyl styrene on curing behaviour and interfacial properties of glass fibre-reinforced vinyl ester resins

The curing behaviour of bismethacryloyl derivative of diglycidyl ether of bisphenol A (vinyl ester VE resin) containing styrene and α-methyl styrene (MS) as reactive diluents was studied. Delayed curing was observed in samples containing increasing proportions of MS. Interfacial shear stress of untreated as well as γ-methacryloyloxy-propyl trimethoxy silane (MTS) treated, glass fibre-reinforced VE resin composites were measured by single fibre technique. In comparison to untreated glass fibres, a 30 – 50% increase in interfacial shear stress was observed in composites based on MTS treated glass fibres. Addition of up to 5 wt.-% MS to VE resin did not affect the interfacial shear strength (ILSS). This behaviour was observed by using ILSS measurement of both glass fabric-reinforced composites as well as single fibre specimens. Further increase in MS to 15 wt.-% resulted in an increase in ILSS and bending stiffness as well as flexural strength.     

Molecular dynamics simulations of vinyl ester resin monomer interactions with a pristine vapor-grown carbon nanofiber and their implications for composite interphase formation

A molecular dynamics simulation study was performed to investigate the role of liquid vinyl ester (VE) resin monomer interactions with the surface of pristine vapor-grown carbon nanofibers (VGCNFs). These interactions may influence the formation of an interphase region during resin curing. A liquid resin having a mole ratio of styrene to bisphenol-A-diglycidyl dimethacrylate VE monomers consistent with a commercially available 33 wt.% styrene VE resin was placed in contact with both sides of two pristine graphene sheets overlapped like shingles to represent the outer surface of a pristine VGCNF. The relative monomer concentrations were calculated in a direction away from the graphene sheets. At equilibrium, the styrene/VE monomer ratio was higher in a 5 Å thick region adjacent to the nanofiber surface than in the remaining liquid volume. The elevated concentration of styrene near the nanofiber surface suggests that a styrene-rich interphase region, with a lower crosslink density than the bulk matrix, could be formed upon curing. Furthermore, styrene accumulation in the immediate vicinity of the nanofiber surface might, after curing, improve the nanofiber–matrix interfacial adhesion compared to the case where the monomers were uniformly distributed throughout the matrix.     

Study on interfacial properties of unidirectional flax/vinyl ester composites: Resin manipulation on vinyl ester system

Flax fibers are widely used as reinforcements in bio‐based polymer matrix composites. This study investigated the hydrophilic nature and surface purity of flax fiber that affects fiber/matrix adhesion in combination with hydrophobic structural polymers via matrix modification and the utilization of fiber treatment, specifically in a flax/vinyl ester (VE) composite. A new method to manipulate the vinyl ester system with acrylic resin (AR) was developed to produce flax reinforced. On the other hand, different types of chemical and physical treatments were applied on the flax fiber. FTIR was applied to evaluate the effects of surface treatments. Dynamic mechanical analysis (DMA) was used to analyze the unmodified and modified VE resin system. The surface of untreated and treated flax fibers and their composites were analyzed by scanning electronic microscopy (SEM). Sodium ethoxide‐treated flax/VE with 1% (wt) AR caused the best mechanical performance among all the flax/VE composites evaluated. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013     

Effect of structure on mechanical properties of vinyl ester resins and their glass fiber‐reinforced composites

The article describes the effect of structure of vinyl ester resins (VE) on the mechanical properties of neat sheets as well as glass fabric‐reinforced composites. Different samples of VE were prepared by reacting ester of hexahydrophthalic anhydride (ER) and methacrylic acid (MAA) (1 : 1 molar ratio) followed by reaction of monomethacrylate terminated epoxy resin with glutaric (E) or adipic (F) or sebacic acid (G) (2 : 1 molar ratio). The neat VE were diluted with styrene and sheets were fabricated by using a glass mold. A significant reduction in the mechanical properties was observed by increasing the methylene content of resin backbone (i.e., sample E to G). Glass fabric‐reinforced composites were fabricated by vacuum assisted resin transfer molding (VARTM) technique. Resin content in the laminates was 50 ± 5 wt %. Increase in the number of methylene groups in the vinyl ester resin (i.e., increasing the bridge length) did not show any significant effect on limiting oxygen index (LOI) value (21 ± 1) of the laminates but tensile strength, tensile modulus, flexural strength, and flexural modulus all increased though these values are significantly lower than observed in laminates based on resin B. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008