叔胺的羧酸复盐对酸酐／环氧树脂体系固化反应和固化物性能的影响

本文应用示差扫描量热和旋转粘度计等手段研究了叔胺的羧酸复盐对酸酐固化环氧树脂体系的潜促进性和固化反应动力学的影响。     

无溶剂环保型单组分潜固化聚氨酯防水涂料的研制

采用环氧大豆油调整产品体系黏度,以潜固化剂固化方式制备了无溶剂单组分聚氨酯防水涂料。讨论了环氧大豆油和醛亚胺类潜固化剂的用量对产品的黏度、VOC含量以及涂膜力学性能的影响。结果表明,环氧大豆油用量在25~30份、潜固化剂的用量在1.5~2.0份时,所制备的无溶剂环保型单组分潜固化聚氨酯防水涂料能满足PU防水涂料GB/T 19250—2013的要求。     

聚氨酯潜固化剂的固化机理及应用

概述了聚氨酯潜固化剂的固化机理以及潜固化剂对聚氨酯体系贮存稳定性、固化速度、产品性能的影响,并介绍了潜固化体系的应用现状。     

紫外光固化体系的研究进展

综述了紫外光固化体系,包括自由基紫外光固化体系、阳离子紫外光固化体系、自由基-阳离子混杂光固化体系和双重固化体系的研究进展。     

辐照固化涂进展（I）

本文从自由基光固化体系，阳离了光固化体系、电子束固化体系等方面记述了辐照固化涂料的进展 。     

单组分湿固化聚氨酯胶粘剂的研究进展

介绍了单组分湿固化型PU(聚氨酯)胶粘剂的发展概况,讨论了该类胶粘剂预聚体的合成方法。重点介绍了两种新型单组分湿固化PU胶粘剂(硅氧烷封端湿固化PU胶粘剂和潜性湿固化PU胶粘剂),并展望了其发展前景。     

几种不饱和聚酯树脂的固化体系

本文介绍了几种不饱和聚酯树脂的固化体系,包括反丁烯二酸二丁酯-过氧化物低毒固化体系;以BP-1、BP-2为促进剂的无色固化休系;以β二酮-环烷酸钴为复合促进剂的固化体系;有机硫化合物-金属盐-过氧化物固化体系以及有机锰、钒促进剂固化体系等,同时还介绍了这些固化体系的固化配方。     

环氧树脂胶粘剂的固化模型、工艺设计以及试验验证

采用非等温DSC法对环氧树脂胶粘剂的固化动力学进行了研究,利用Kissinger模型计算得到体系固化反应的表观活化能为91.2 kJ·mol^-1,通过Crane模型计算出固化反应级数为0.93。基于动力学参数,构建出体系固化度与温度、时间关系的固化模型。利用"T-β"及"t-β"外推法分析,获得了体系固化反应温度及固化时间,并试验验证了固化工艺参数的有效性。该研究成果可为环氧树脂胶粘剂的固化工艺及应用提供理论指导和参考。     

电子束固化机理

主要从下述几方面介绍了电子束固化机理：电子束和紫外光固经机理比较;电子束与介质相互作用过程;电子束固化过程中起作用的活性粒子;电子束固化丙烯酸酯体系和阳离子体系的机理等。     

环氧树脂非等温固化动力学及其固化工艺的研究

采用差示扫描量热法（DSC）研究了N-乙基邻对甲苯磺酰胺/环氧树脂体系的固化过程,研究了不同配比对固化反应的影晌,固化度与固化温度的关系,计算了固化反应表观活化能和反应级数,确定了N-乙基邻对甲苯磺酰胺/环氧树脂体系的固化工艺。结果表明：不同升温速率下,体系固化温度有很大差异,随着升温速率的提高,固化温度增加。通过动力学计算得到体系最佳固化温度为90℃,固化时间为4~6 h,固化体系的活化能为29.1 kJ/mol,反应级数为0.81。     

潜伏性环氧固化剂研究进展

按固化条件的不同分别介绍了加热型、光固化型、潮湿型潜伏性环氧固化剂,列举了各类固化剂的典型代表及其性质,展望了今后潜伏性固化剂的研究重点和发展趋势。     

单组分环氧树脂胶粘剂的研究现状

综述了单组分环氧树脂胶粘剂的发展现状,介绍了湿气固化型、微胶囊包覆型、潜伏性固化剂型以及阳离子光固化等类型的单组分环氧胶的研究进展,重点讨论了潜伏性固化剂型环氧胶的改性方法及效果。     

Novel imidazole derivatives with recoverable activity as latent curing agents for epoxy

A series of latent curing agents were developed by replacing the hydrogen atom on secondary amine in imidazole with methoxy polyethylene glycol maleate diesters via Michael addition reaction. Methoxy polyethylene glycol maleate diesters with different molecular weight also restrained the reactivity of tertiary amine in imidazole ring. The curing properties and pot-life of the modified imidazole/epoxy systems were measured by differential scanning calorimeter and rotational rheometer. The modified imidazole/epoxy system could be cured quickly at 175°C. The modified imidazole shows good latency. After stored for more than 1 month, viscosity of modified imidazole/epoxy system remains unchanged. The longer chain polyether had the better thermal latency these curing agents had. Compared with unmodified imidazole, the novel latent curing agents led to better impact strength for cured epoxy. However, the compatibility between epoxy and latent curing agent will get worse if the molecular weight of polyether unite is over 750.     

中温热熔预浸料用环氧树脂及其固化体系的研究进展

本文综述了中温热熔预浸料用环氧树脂体系,包括国内外基体树脂及固化体系的发展现状;分析了粘度对基体树脂的影响规律、固化剂和促进剂的匹配、催化剂的选择等;重点介绍了脲类衍生物和咪唑两类固化促进体系的进展;表明环氧树脂热熔预浸料研制的技术关键是选择合理的树脂体系组合,有较长潜伏期的固化剂和促进剂的匹配及合适的催化剂。     

潜伏性固化剂——亚胺衍生物的合成及对环氧丙烯酸树脂的固化作用

将丙酮、丁酮和苯甲醛与γ-氨丙基三乙氧基硅烷反应,合成了几种新型环氧丙烯酸树脂的潜伏性固化剂——亚胺衍生物,并用IR、1HNMR和元素分析进行了表征.向环氧丙烯酸树脂中添加3％上述固化剂并进行了DSC、FT-IR、水煮、黄变和硬度等涂膜的性能测试.结果表明,本实验合成的固化剂在室温下表现出惰性,在120℃下可使环氧丙烯酸酯迅速固化,显著提高了环氧丙烯酸树脂的性能.     

中温潜伏性固化剂在环氧胶黏剂中的研究进展

在环氧胶黏剂体系中,中温潜伏性固化剂以其优异的潜伏性和相对较低的固化温度而成为研究热点,符合当下提倡的绿色、环保、"低碳生活"理念。详细介绍了双氰胺、咪唑、酸酐、有机酰肼、BF3-胺络合物、微胶囊六种中温潜伏性固化剂及其改性方法。它们的改性方法主要是:通过改性活化或者加入活性促进剂降低双氰胺、酸酐、有机酰肼等高温固化剂的固化温度;通过改性钝化咪唑的固化活性,延长室温储存期;将BF3等路易斯酸室温固化的固化剂与胺络合降低其固化活性,提高室温储存期;将活性固化剂用壁材包裹形成微胶囊使其在室温时稳定,较高的温度时壁材破裂释放出活性固化剂,迅速固化。     

环氧复合材料低温固化剂研究进展

低温固化(固化温度低于100℃)可获得高尺寸稳定性、低成本、力学性能优良的环氧复合材料,室温储存期长的低温固化剂体系是低温固化环氧复合材料的关键。重点探讨了微胶囊型、潜伏性以及其它改性环氧低温固化剂,展望了其未来前景及发展方向。     

Synthesis and application of thermal latent initiators of epoxy resins: A review

Epoxy resin, which is extensively used in civil and industrial applications, shows excellent comprehensive performance, especially as a polymer matrix used in fiber-reinforced composites. A thermal latent initiator, used as an epoxy curing agent, has high storage stability and is widely applied in the preparation of epoxy-based blends and fiber-reinforced composites. In this review, the basic properties of epoxy resins and commonly used curing agents are discussed while progress on the synthesis of thermal latent initiators is reviewed in detail. Moreover, the curing mechanisms, thermal stability, and mechanical properties of epoxy resins with thermal latent initiators are also discussed.     

单组分环氧树脂胶粘剂用潜伏性固化剂

对单组分环氧树脂胶粘剂用潜伏性固化荆的研发进展进行了扼要的综述.     

Polymer hybrids from self‐emulsified PU anionomer and water‐reducible acrylate copolymer via a postcuring reaction

Water‐reducible acrylate copolymer is obtained from a free‐radical copolymerization of n‐butyl acrylate, acrylic acid, and methacrylic acid. Self‐emulsified aqueous‐based polyurethane (PU) anionomer is prepared by the conventional method. The latent curing agents (di‐ and triaziridinyl compounds, HDDA‐AZ and TMPTA‐AZ) are synthesized from the reaction of aziridine with hexandiol diacrylate and trimethylolpropane triacrylate, respectively. These two polymers and the latent curing agent are miscible in each other and become a single component and self‐curable polymer dispersion. The carboxyl ions of polymers not only stabilize the aqueous polymer dispersions but also serve the curing site toward latent curing agent in the drying process. These two polymers blend with a curing agent, which results in new polymer hybrid formation. These polymer hybrids have the improvements on performance properties and the cost/performance benefits. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 90: 3578–3587, 2003