水性涂料在船舶上的应用研究

采用无皂法制备水性丙烯酸乳液,通过半连续滴加工艺进行无皂乳液聚合反应,利用该乳液制备的涂料,研磨分散过程不易破乳,且漆膜与基材的附着力好。通过分析乳液种类、玻璃化转变温度和配套底漆类型对漆膜的外观形貌、附着力及耐盐雾性能影响,得到影响耐盐雾性能的因素。结果表明:利用无皂法制备的丙烯酸乳液水性内舱面漆膜致密;玻璃化转变温度高的无皂乳液耐盐雾500 h内具有优异的性能,而玻璃化转变温度低的在1 000 h盐雾的效果更好一些;与溶剂型环氧底漆、水性环氧底漆都具有良好的配套性能,具有优异的附着力和良好的耐盐雾性能。     

无溶剂环氧涂料的制备及涂层性能研究

为提高环氧涂料在受力和形变等动态环境下的性能,通过对环氧树脂和固化剂等基础材料的筛选、涂膜柔韧性能的改善和防腐蚀底漆配方的设计,研制一款无溶剂环氧树脂工业防腐蚀涂料。选取黏度较低的J51型环氧树脂以及与其成膜性好且漆膜力学性能优异的WH-31型环氧固化剂作为主要成膜物质,通过环氧活性稀释剂(SM80)进行增韧,当SM80与环氧树脂比例为1:7时,涂层柔韧性可达1mm且与碳钢板拉拔附着力可达12MPa。在此基础上进行无溶剂环氧铁红底漆研制,得到施工方便、力学性能优异、耐水性良好、耐碱性良好,耐盐雾可达1000h的工业防腐蚀底漆。     

纳米硅溶胶/丙烯酸复合防蚀薄膜的研究

为了寻找一种镀锌层表面用无铬钝化剂,研究以水溶性丙烯酸树脂为成膜物质,纳米硅溶胶为颜料,用浸涂法在热镀锌板上制备有机/无机复合薄膜,并利用SEM、浸水、中性盐雾试验等测试手段分析了薄膜表面形态、吸水率和耐盐雾性能.结果表明,在复合薄膜中丙烯酸与SiO2形成互相贯穿的无规网络结构,薄膜与镀锌板结合力良好,表面呈现出良好的抗白锈能力,其耐蚀性能是热镀锌板的4倍.这种钝化剂为镀锌层的腐蚀防护提供了一种新的环保型薄膜材料.     

碳纤维/碳纳米管-环氧树脂复合材料的耐老化性能

将环氧树脂基体与氨基化碳纳米管(MWNTs)复合,制备了碳纤维/氨基化碳纳米管-环氧树脂(CF/MWNTs-EP)复合材料。表征CF/MWNTs-EP三相复合材料的断面,并在标准条件下测试其冲击、拉伸等力学性能,研究了耐老化性能。结果表明:氨基化碳纳米管的加入明显提高了材料的耐盐雾性、耐热氧老化性和耐湿热性能。氨基化碳纳米管的加入改善了纤维与基体树脂间的界面性能,同时,促进了环氧树脂的固化,降低孔隙率,导致耐老化性能显著提高。当MWNTs-NH2的添加量(质量分数)为1.0%时,在72h和168h不同盐雾时间下,三相复合材料的耐盐雾老化性比CF/EP复合材料分别提高了61.8%和67.5%。在48h、96h和168h热氧老化时间下,三相复合材料的耐热氧老化性比CF/EP复合材料分别提高了43.5%、48.5%和41.7%。在72h和168h不同湿热时间下,三相复合材料的耐湿热老化性比CF/EP复合材料分别提高了52.8%和60.0%。     

高耐蚀性新型水性锈转化涂料的制备及涂膜性能

现有的几种锈转化涂料存在转锈效果差、溶剂污染、受施工环境影响等问题,自制了螯合型G-OA1转锈剂,并辅以颜填料和助剂,制备了一种具有良好带锈施工性能和防腐蚀性能的新型水性锈转化涂料。利用X射线衍射仪和扫描电镜分析了G-OA1的转锈效果;采用划格法和盐雾试验测试涂膜的附着力和耐蚀性。优选了主成膜物质及转锈剂用量。结果表明:以氯乙烯基乳液为主成膜物质,转锈剂G-OA1用量为4%~5%(质量分数)时,涂料涂膜性能最佳;该涂料铁锈转化能力强;涂膜附着力达1级,盐雾腐蚀500 h未出现返锈、起泡、起皱及脱落现象;此涂料作底漆时,与溶剂型或水性面漆匹配性好,与旧漆膜亦有良好的附着力。     

环氧改性醇酸树脂发光涂料的研制

以环氧改性醇酸树脂为成膜物质,添加稀土发光材料(SrAl2O4∶Dy3 ,Eu2 )制备出高性能发光涂料,并介绍配方及工艺。结果表明,所得涂料的干燥性好,耐盐水性,耐盐雾性,和耐化学品性佳,发光性能优良,余辉亮度强且余辉时间长,为优质的发光涂料。     

环氧底面合一防腐耐候涂料的制备

底面合一涂料可缩短施工周期，降低施工费用。选用氢化环氧树脂、超支化增韧树脂和脂环胺固化剂作为涂料的成膜物体系，辅以防腐耐候型颜填料，制备出底面合一防腐耐候涂料。结果表明：经与普通双酚A型环氧树脂涂层性能对比，底面合一防腐耐候涂料涂层可耐人工气候老化(UVB)和划叉盐雾2000h,涂层变色2级，粉化1级，不起泡、不开裂、不脱落，附着力高，施工性能好，可应用在船舶及其他钢结构，同时还可在极低温度下应用，在极寒地区有较好的应用前景。     

纳米二氧化钛表面化学改性及在涂料中的应用

探讨了一种有效的纳米二氧化钛表面化学改性的方法，对改性后的二氧化钛各项性能进行了测试，并将其应用于环氧树脂涂料中，和常规二氧化钛以及未经改性的纳米二氧化钛进行了比较，发现其能显提高涂料的耐盐雾性、抗冲击性、耐划痕性和柔韧性等。     

石墨烯改性锌粉环氧底漆的贮存稳定性及涂层盐雾性能研究

为了探究石墨烯改性锌粉底漆经过长期贮存后的稳定性及防腐蚀性能变化,采用不同方法制备的石墨烯粉体配制了石墨烯改性锌粉环氧涂料,对经长期贮存后的石墨烯分离物分别进行拉曼光谱、透射电镜和扫描电镜等测试分析,利用中性盐雾试验(NSS)测试了石墨烯改性锌粉底漆的耐蚀性.结果 表明:在合理的锌粉底漆配方下,采用爆燃法制备的石墨烯粉体与市售涂料用氧化还原法制备的相比,前者制备的石墨烯改性锌粉底漆的耐盐雾性能更为优异,稳定性更好.     

有机硅改性丙烯酸树脂夜光涂料

用有机硅改性丙烯酸树脂作为主要成膜物质,将稀土硫化锌夜光颜料和铝酸锶铕夜光颜料分散于有机硅改性丙烯酸树脂中制成夜光涂料。结果表明,所得有机硅改性丙烯酸树脂稀土硫化锌夜光涂料和有机硅改性丙烯酸树脂铝酸锶铕夜光涂料的涂抹性能好,耐水性、耐碱性、耐候性和耐沾污性强,夜光性能好,余辉亮度强且余辉时间长,为优质的夜光涂料。     

Synthesis and characterization of petroleum resins with epoxy groups

Pyrolysis of petroleum hydrocarbons (including diesel pyrolysis) aimed at obtaining polyethylene also creates certain liquid products which can be used for making so-called petroleum resins (PRs). The C₉ fraction from pyrolysis contains among others, styrene and its derivatives, indene and pentanodiene. Petroleum resins with epoxy groups (PREs) have been synthesized by oligomerization of unsaturated components of the C₉ fraction in the presence of 4,4′-azo-bis-[2,3-epoxypropoxy-4-cyano-pentanenitrile] (AEPCP) used as an azoinitiator. The influence of azoinitiator quantity, temperature and time of oligomerization upon the yield and characteristics of the resulting functional petroleum resins has been evaluated. The structure of the products was confirmed by IR-spectroscopy. Our PREs have potential applications as active additives to industrial epoxy resins based on Bisphenol A.     

溶剂浸渍树脂的制备及孔结构的研究

用萃取剂N_(235)(多种叔胺混合物)浸渍大孔苯乙烯-二乙烯基苯吸附树脂(SDAR)制备了溶剂浸渍树脂(SIR)。研究了浸渍和SDAR合成条件与SDAR对N_(235)的吸附率的关系及N_(235)在SDAR基体上的分布情况,测试了SIR的孔结构及热稳定性。红外光谱表明,N_(235)在SDAR基体上属于物理吸附。     

环氧树脂高性能化的方法与机理

本文介绍了近年来国内外环氧树脂高性能化的方法与机理，包括结构化改性、橡胶改性、热塑性树脂改性、膨胀单体改性以及无机填料改性等。     

Survey of Food Can Coatings in Thailand – Their Use,Extractable Residues and Migrations

Face‐to‐face interviews with manufacturers of food cans and producers of canned foods in Thailand were performed to collect information in real practice regarding the use of coating resins with respect to packed food types. For export markets, epoxy‐coated cans accounted for 58%, polyvinyl chloride organosol 35% and uncoated 7%. Meanwhile, the respective fractions for domestic markets were 83, 2 and 15%. The identification of coating polymers was confirmed using Fourier transmission infrared technique. It was found that acetonitrile extraction could be used to predetermine the compliance of coated cans before use, provided that the detected amounts are below the limits. Interestingly, the highest levels of bisphenol A diglycidyl ether (BADGE) and its hydrolysed products detected in simulants and 45 canned food samples were factors of 10 to 21 below its SML of 9 mg/kg, and the percentage of samples containing ‘non‐detectable’ levels of BADGE ranging from 10 to 70; of chlorohydroxy BADGE – factors of 3 to 13 below 1 mg/kg, and the percentage of ‘non‐detectable’ ranging from 57 to 85; and of bisphenol A – factors of 32 to 140 below 0.60 mg/kg, and the percentages of ‘non‐detectable’ ranging from 0 to 95. The determination of BADGE and its derivatives was performed on a high‐performance liquid chromatograph with a fluorescence detector, while bisphenol A using a gas chromatography–mass spectrometry technique. All cans and canned food samples extensively complied with European Union regulations and Japanese voluntary standards. Copyright © 2017 John Wiley & Sons, Ltd.     

Effect of fibre conditioning on the interfacial shear strength of glass-fibre composites

A study of the interaction of water-sized E glass fibres, supplied with and without an aminopropylsilane coupling agent, with vinyl and epoxy resins is reported. Interfacial shear strength measurements, made by means of the multifragmentation technique, have demonstrated that molecularly thin layers are effective adhesion promoters, as indicated by (a) the silane contamination on the nominally non-coupled fibres and (b) the aqueous extraction of the coupled fibres. Epoxy resins adhere through amino coupling reactions, but for the vinyl ester resin the maximum adhesion probably occurs through aluminium hydroxide sites exposed through extractive hydrolysis, and acidic residues in the resin.     

钼酚醛树脂的热性能和烧蚀性能的研究

采用DSC方法研究了新型钼酚醛树脂的固化行为和固化反应动力学,用TG方法研究了固化产物的热降解性能,并进行了钼酚醛复合材料的高温烧蚀试验和高焓条件下的烧蚀试验。结果表明,No.2钼酚醛树脂,当树脂、固化剂配比为100/10时,固化温度最低,固化反应表现活化能最小,产物的热稳定性最佳,成炭率最高。同时表明,钼酚醛复合材料的高温烧蚀性能良好,特别是在高热通量条件下,性能更佳。     

摩擦材料中树脂对其性能的影响

阐述了硼桐油双改性酚醛树脂的改性原理,对以此为基体的编织型摩擦材料的磨损率和摩擦系数进行了测试和分析,并与其他几种酚醛树脂基摩擦材料进行了对比。结果表明,对酚醛树脂进行硼桐油双改性后应用于摩擦材料的效果理想。     

环氧树脂的NM R 表征

用1H、13C 核磁共振波谱对二酚基丙烷环氧树脂E-51、缩水甘油胺型环氧树脂A G-80、脂环族缩水甘油酯TDE-85 的结构进行了表征, 并通过二维COSY 谱及1H-13C 化学位移相关谱对各共振峰进行了指认。      

液晶环氧树脂的研究概况

综述了液晶环氧树脂国内外的研究进展,介绍了液晶环氧化合物及固化剂的种类主要性质和合成方法,并简述了液晶环氧树脂的前景及发展方向。