氧化石墨烯/环氧富锌底漆的制备及性能研究

采用分散性能优异的氧化石墨烯(GO)代替环氧富锌底漆中的部分锌粉,制备了一种氧化石墨烯/环氧富锌底漆。采用X射线衍射分析仪、透射电子显微镜、扫描电子显微镜、盐雾试验仪、耐冲击测试仪、附着力测试仪等对氧化石墨烯/环氧富锌底漆中氧化石墨烯分散效果以及氧化石墨烯/环氧富锌底漆涂层的性能进行了方法分析。结果表明,氧化石墨烯添加量为0.5%时,氧化石墨烯/环氧富锌底漆中氧化石墨烯的分散效果最好,且氧化石墨烯/环氧富锌底漆涂层具有最佳的防腐性能。     

钢结构重防腐涂层典型配套的水性化研究

研制开发的钢结构水性环氧防锈底漆、水性环氧富锌底漆、水性环氧防腐中间漆和水性丙烯酸聚氨酯面漆系列产品性能接近或达到行业标准(港口机械钢结构防腐涂层技术要求JT/T 733—2008)的技术要求,产品具有明显的竞争优势。     

钢结构用水性环氧防腐底漆的研制

采用水性环氧固化剂乳化固化液体环氧树脂技术路线,制备钢结构用水性双组分环氧防腐底漆。该底漆VOC含量低,气味和毒性小,涂膜附着力强,耐水、耐碱、耐盐雾性能好。其性能可以达到溶剂型环氧底漆水平,成本与溶剂型环氧底漆相当。     

水性环氧底漆在城轨车辆上应用的难点

重点介绍了城轨车辆用水性环氧底漆的涂装工艺、技术要求,探讨了水性环氧底漆防腐性能、施工工艺、配套性3个技术难点。     

船用车间底漆样品性能研究

对搜集到的国内外知名厂家的11个车间底漆样品进行水性与溶剂型无机硅酸锌车间底漆性能试验及对比研究,研究结果表明:水性无机锌车间底漆可以达到GB/T 6747-2008《船用车间底漆》的要求,并且具有耐高温性能好、VOC含量低的特点.为了能在船厂生产线进行进一步应用和适用性等试验,还进行了一些前期实验室的探索试验工作.     

铁路机车用环氧底漆耐盐雾性能的改进

通过分析盐雾腐蚀机理及影响环氧底漆耐盐雾性能的各种因素,对铁路机车用环氧底漆的耐盐雾性能采取了各种改进措施,达到了铁道部标准TB/T2260—2001规定的500h的要求。     

船舶建造期中的保养底漆——H_(210)底漆

由广州制漆厂、广州东风化工厂、广州造船厂协作试制的H_(210)聚酚氧保养底漆经过两年多的不断研究和改进,各项技术性能和实船施工效果基本符合造船工业钢材自动抛丸除锈防腐流水线工艺的要求,广东省军工局受六机部委托汇同广州市化工局于一九七五年十二月在广州进行了技术鉴定。鉴定认为,H_(210)保养底漆用于钢材自动抛丸除锈防腐流水线工艺真有较好的性能,具体表现为: 1.能够使用喷涂施工,干燥速度比环氧富锌底漆快,喷漆后5—10分钟即可吊运; 2.喷漆后的钢材进行气割和焊接时产生的主要有害气体为国家规定最高容许浓度的1/11,为环氧富锌底漆的1/7,工人施工以后未发现象环氧富锌底漆那种发热头昏等     

轨道交通客车车辆用水性环氧底漆的制备与性能研究

通过对树脂、固化剂、防锈颜料和附着力促进剂的筛选,制备了应用于轨道交通客车车辆防腐的水性环氧底漆。其性能符合Q/CR 581—2017《铁路客车用涂料技术条件》,该底漆VOCs含量较低,耐盐雾性佳,具备极佳的环境友好性能和防腐性能;在碳钢、不锈钢、铝合金3种底材上的附着力极好;与原子灰腻子的配套性极佳,是轨道交通客车配套涂装应用中VOCs减排、防腐蚀的优选产品。     

环氧/氟碳复合涂层对碳钢在盐水中的保护作用研究

用电化学交流阻抗技术(EIS)分析了环氧富锌底漆、环氧云铁中间漆和氟碳面漆配套而成的3种不同涂层体系(单涂层、双涂层及三涂层体系)在3.5%NaCl水溶液中的失效过程。通过|Z|0.01 Hz、涂层孔隙率和吸水率的变化分析了底漆、中间漆和面漆对涂层整体防腐性能的影响。结果表明,环氧云铁中间漆的抗腐蚀介质渗透能力优于环氧富锌底漆和氟碳面漆,对复合涂层体系的防护性能起到了重要作用。浸泡初期,中间漆对涂层屏蔽性能影响很大;浸泡中后期,环氧富锌底漆发挥阴极保护和腐蚀产物的屏蔽作用,使得涂层的防护性能得到有效提高。氟碳/环氧云铁/环氧富锌复合的三涂层体系的吸水率和孔隙率总体最低,吸水率能在较长时间保持在较低水平,对水和离子渗透起到了很有效的屏蔽作用。     

油罐用聚氨酯改性环氧树脂基防腐底漆的研制

采用聚氨酯改性环氧树脂为基料,环己酮、甲基异丁基酮和2-庚酮(MAK)为混合溶剂,三聚磷酸铝和磷酸锌、云母氧化铁红作为防锈颜填料,制备聚氨酯改性环氧树脂基防腐底漆,研究了基料、混合溶剂和防锈颜填料等因素对底漆防腐性能的影响。利用红外光谱、接触角测试、机械性能测试、电化学交流阻抗谱、耐腐蚀介质测试、单因素和正交试验等方法检测底漆的防腐性能。结果表明:混合溶剂质量比为5∶4∶1的清漆涂层阻抗为1.32×1010Ω·cm2;颜基比(P/B)为0.8~0.9、三聚磷酸铝与磷酸锌质量比为6∶4、厚度为75~90μm的色漆涂层阻抗高达2.1×1010Ω·cm2,涂层电容低至7.2×10-11F/cm2;底漆具有优异的机械性能和防腐性能,能够满足石油储罐的防腐技术要求。     

Influence of molecular interactions on spherulite morphology in miscible poly(ethylene oxide)/epoxy network versus poly(ethylene oxide)/poly(4‐vinyl phenol) blend

Relationships between the spherulite morphology and changes in hydrogen‐bonding interactions between the linear poly(ethylene oxide) (PEO) polymer and a crosslinking epoxy system (diglycidylether of bisphenol‐A resin with 4,4′‐diaminodiphenylsulfone) (DGEBA/DDS) before and after cure have been explored The hydrogen‐bonding interaction is more significant before cure because of the interactions between the ether group of PEO and the amine group of DDS. The interaction between PEO and epoxy/DDS becomes less in the cured network. The morphology of the PEO crystals is, in turn, affected by the contents and chemical structures (functional groups, molecular weights, crosslinks, etc) of crosslinking epoxy/DDS. PEO/poly(4‐vinyl phenol) (PVPh), a thermoplastic non‐curing miscible system with the hydrogen bonding between the ether group of PEO and the ? OH group of PVPh, is also compared. In comparison with the PEO/epoxy/DDS system, the spherulite morphology of PEO/PVPh becomes more extensively spread out, with the extents increasing with the PVPh contents in the PEO/PVPh blend. © 2001 Society of Chemical Industry     

环氧端基酚酞聚芳醚腈改性环氧树脂胶粘剂性能的研究

通过差示扫描量热 (DSC)、热解重量分析 (TGA)和粘接强度的测定 ,对环氧端基酚酞聚芳醚腈改性的环氧树脂胶粘剂的性能进行了研究     

Improvement of adhesion between poly(ethylene terephthalate) and polyethylene

Three-layer films were prepared with polyethylene (PE) and poly(ethylene terephthalate) (PET) films as the outer layers and a film of high-density polyethylene (HDPE)/ethylene-methyl acrylate-glycidyl methacrylate (E-MA-GMA) terpolymer blend as the inner layer using compression molding. E-MA-GMA, an elastomer containing an epoxy functional group, was used as the adhesion promoting agent in the multilayer films. The effects of processing temperature, pressure application time and elastomer concentration on adhesion were investigated. The adhesion strength between PE and PET films increased with increasing bonding temperature, bonding time and elastomer concentration. From contact angle measurements, it was observed that the work of adhesion between the polymers increased with increasing amount of elastomer. Improved adhesion between PET and HDPE with 30% elastomer films was confirmed by SEM analyses of the film layers. Using FT-IR analysis of PE/HDPE-30% elastomer/PET delaminated film, the decrease in peak intensity of the epoxy groups tends to indicate reaction of epoxy functionality with functional groups in PET.     

Poly(methyl methacrylate)–epoxy vitrimer composites

In this study, we synthesized poly(methyl methacrylate) (PMMA) epoxy vitrimer composites by doping methyl methacrylate (MMA) and benzoyl peroxide into a curing system of epoxy resin and citric acid. The vitrimer composites were characterized with dynamic mechanical thermal analysis, scanning electron microscopy, and stress‐relaxation and lap‐shear testing. The test results show that with increasing amount of MMA, the existence of PMMA in the epoxy vitrimer matrix in the form of intermiscible, slightly soluble, and phase separation became more evident. When the doping amount of PMMA reached 10–25 wt %, the bonding strength of the PMMA–epoxy vitrimer composites was about two times that of the epoxy vitrimer (from 2.3 to 4.3 MPa). This showed that the self‐healing strength of the vitrimer composites was better than that of the pure vitrimer. When the PMMA in the epoxy matrix was in a slightly soluble form, the linear PMMA improved the mechanical properties of the epoxy vitrimer by physical winding. At the same time, the doping of PMMA promoted the transesterification rate of the epoxy vitrimer and enhanced the bonding strength of the composites without lowering the epoxy vitrimer glass‐transition temperature. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135, 46307.     

环氧树脂导电胶的研究现状

环氧导电胶是代替Sn/Pb焊料的一种胶黏剂,与传统的Sn/Pb焊料相比,环氧导电胶具有粘接温度低、可控性好、分辨率高、工艺简便以及环保等优点。近年来,科研工作者积极地研发高性能、多功能以及低成本的新型导电胶,以满足不断发展的市场需求。环氧导电胶作为一种新型的复合工业材料,具有巨大的发展潜力以及广阔的应用前景。阐述了影响环氧导电胶黏剂性能的因素以及高性能环氧导电胶的研究状况,并对环氧导电胶黏剂的未来发展作了展望。     

Hydrogen bonding in epoxy resin/poly(ϵ-caprolactone) blends

Poly(?-caprolactone) (PCL) of ca. 20,000 molecular weight is shown to be partially miscible with three aromatic-amine-cured epoxy resins. This conclusion is based on the depression of the epoxy T_g, the effect on physical and mechanical properties, and the observation that a large proportion (40-55%) of the PCL ester groups are involved in hydrogen bonding. This miscibility behavior is compared to PCL blends with anhydride-cured epoxy resins, which appear to have a two-phase morphology. The different miscibilities are rationalized on the basis of the existence of functional groups (e. g., hydroxyl) in amine-cured epoxies which are capable of hydrogen bonding to the PCL ester groups. Anhydride-cured epoxy resins contain fewer potential hydrogen bonding sites.     

纳米TiO2对环氧树脂及碳纤维增强复合材料力学性能的影响

利用超声波技术将纳米TiO2在环氧树脂中进行分散,考察了纳米TiO2含量对环氧树脂及碳纤维/环氧复合材料力学性能的影响。研究表明,纳米TiO2可对环氧树脂固化物同时起到增韧增强的作用,冲击断口形貌显示为典型的韧性断裂。同时纳米粒子的加入可改善碳纤维和树脂基体的界面粘结性能,提高复合材料的层间剪切强度。     

制刷用环氧树脂胶黏剂的研制

以油脂为原料,对长碳链环氧树脂的合成工艺进行了研究,探讨了合成反应条件对环氧树脂性能的影响。合成可挠性环氧树脂的最佳工艺条件为:反应温度 125℃,时间 2 h,催化剂用量 0.2%。制得的环氧树脂胶黏剂的性能及刷鬃结合强度达到相关企业标准。     

Influence of intramolecular specific interactions on phase behavior of epoxy resin and poly(ε-caprolactone) blends cured with aromatic amines

Two aromatic amines were used as the curing agents to prepare the thermosetting blends of epoxy and poly(ε-caprolactone) (PCL). When cured with 4,4′-methylenebis(2-chloroaniline) (MOCA), the thermosetting blends are miscible in the amorphous state in the entire composition, which was evidenced by the behavior of single, and composition-dependent glass transition temperatures (T_g's) in terms of thermal analysis. Fourier transform infrared spectroscopy (FTIR) showed that there are the intermolecular specific interactions (viz. hydrogen bonding) between the component polymers. However, the 4,4′-diaminodiphenylsulfone (DDS)-cured epoxy forms the immiscible blends with PCL. The blends displayed a typical reaction-induced phase separation morphology. The phase behavior seems to be more than the expected since it was ever proposed that there would be the intermolecular specific interactions between amine-cured epoxy and PCL, which would fulfill the miscibility of the systems. To interpret the phase behavior, we investigated that the miscibility and intermolecular specific interactions in the blends of model compounds and linear homologues of epoxy with PCL. It was observed that in MOCA-cured blends there were much stronger intermolecular specific interactions than in DDS-cured counterparts. The weaker intermolecular specific interactions between DDS-cured epoxy and PCL resulted from the formation of the intramolecular hydrogen bonding interactions within DDS-crosslinked epoxy, which were involved with the sulfonyl groups and the secondary hydroxyls. The intramolecular association could suppress the formation of the strong intermolecular hydrogen bonding interactions between carbonyls and hydroxyls of amine-cured epoxy, which are sufficient to fulfill the homogenization of the system during the in situ polymerization. Therefore, the presence of the intramolecular specific interactions between sulfonyl and hydroxyl groups was taken as the origin of phase-separated morphology for DDS-cured blends of epoxy with PCL.     

提高环氧树脂黏钢胶机械性能的研究

研究目的在于提高建筑用环氧树脂黏钢胶的机械性能,以符合建筑行业使用的要求.通过采用自制酚醛胺为固化剂,并采用复配技术优化环氧树脂胶黏剂的组成,达到了调节胶黏剂刚性和韧性平衡的目的.考察了环氧树脂和填料的种类及用量对环氧树脂胶黏剂拉伸、弯曲和压缩强度的影响.当主树脂为E-51,添加100％比例为1:3的滑石粉与细砂复配填...