共查询到20条相似文献,搜索用时 109 毫秒
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《有机硅材料及应用》2009,(5):356-356
深圳职业技术学院的刘红波等人将N-环己基-3-氨丙基甲基二甲氧基硅烷与季戊四醇三丙烯酸酯通过迈克尔加成反应制成可光固化的有机硅改性丙烯酸酯;并将其作为稀释剂加入到由环氧丙烯酸酯、二丙二醇二丙烯酸酯、季戊四醇三丙烯酸酯和光引发剂组成的紫外光固化体系中。结果发现,随着有机硅改性丙烯酸酯加入量的增加,固化膜的凝胶率和断裂强度下降,表面的水接触角增大; 相似文献
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以多种多元醇、异氰酸酯与扩链剂为原料采用预聚法合成聚氨酯弹性体,考察了不同多元醇、异氰酸酯、扩链剂的种类及含量对聚氨酯弹性体性能的影响。结果表明:聚己二酸乙二醇酯二醇(PEA)与三羟甲基丙烷(TMP)并用,在质量比为95∶5时,制得的弹性体综合力学性能较好。随着4,4′-二环己基甲烷二异氰酸酯(H12MDI)含量的增加,材料的强度有所增加,预聚体的凝胶时间逐渐延长。 相似文献
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以聚酯多元醇、二异氰酸酯和丙烯酸羟乙酯为原料,合成聚氨酯丙烯酸预聚体,并在此基础上通过添加活性稀释单体、光引发剂等配制成UV固化胶黏剂。通过分析不同组分在LCD液晶灌注口密封及金属管脚固定的粘接性能影响,确定合成预聚体所需的聚酯多元醇种类及丙烯酸羟乙酯的合适用量,同时确定配胶所需活性稀释单体与光引发剂的合适用量。最后制得粘接性能好、耐候性能佳,可满足LCD产品生产工艺的性能要求的UV固化胶黏剂。 相似文献
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UV固化低聚物及其涂料研究进展 总被引:3,自引:0,他引:3
综述了UV固化低聚物(主要是环氧丙烯酸酯和聚氨酯丙烯酸酯)的研究进展。环氧丙烯酸酯研究进展包括:降低黏度、改善柔韧性、光敏活性、耐热性、耐磨性和阻燃性能;聚氨酯丙烯酸酯的研究进展包括:紫外光固化的聚氨酯丙烯酸酯预聚物合成方法;聚氨酯丙烯酸酯/无机纳米复合材料;光固化无机/有机杂化材料;水性UV固化聚氨酯丙烯酸酯和UV固化超支化聚氨酯丙烯酸酯。较为详细地论述了氧阻聚的3种作用机理及解决方法(物理和化学2种方法),最后对光固化技术的5大发展趋势进行了展望。 相似文献
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以聚醚二元醇和POCl3为原料合成了含磷三元醇聚合物,再与异佛尔酮二异氰酸酯(IP-DI)、丙烯酸羟乙酯(HEA)反应,制成了聚氨酯丙烯酸酯(PUA)改性磷酸酯,通过红外光谱进行分析表征。将合成的PUA改性磷酸酯添加在紫外光固化胶粘剂中分析测试了其应用性能,并与紫外光固化胶粘剂(UV胶)中常用的磷酸酯类附着力促进剂进行了对比。结果表明,POCl3与聚醚二元醇在40℃下反应4 h可以得到预期的含磷三元醇。得到的PUA改性磷酸酯与UV胶粘剂中常用的磷酸酯相比,附着力、粘接强度可以达到其要求,但是酸值低于现有的磷酸酯,更适合在UV胶粘剂中应用。 相似文献
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以二官能团PUA(聚氨酯丙烯酸酯)为基体树脂、四氢呋喃丙烯酸酯为稀释单体、γ-缩水甘油醚基丙基三甲氧基硅烷(KH-560)为偶联剂、HCPK(1-羟基环己基苯基甲酮)为光引发剂和nano-SiO2(纳米二氧化硅)为填料,成功制备出一种UV(紫外光)固化胶。将UV固化胶用于PC(聚碳酸酯)塑料片材的胶接,并以该胶接件的T型剥离强度作为考核指标,采用单因素试验法优选出制备UV固化胶的较佳配方。结果表明:当w(二官能团PUA)=64%、w(HCPK)=3.0%、w(KH-560)=1.00%、w(四氢呋喃丙烯酸酯)=30%和w(nano-SiO2)=2.0%时,UV固化胶的剥离强度达到甚至超过市售同类产品(loctite3106)。 相似文献
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聚氨酯丙烯酸酯软段结构对UV胶性能的影响 总被引:1,自引:0,他引:1
以几种不同结构的多元醇、异佛尔酮二异氰酸酯(IPDI)和丙烯酸羟乙酯为原料,合成了多种聚氨酯丙烯酸酯预聚物(PUA).按照同样比例的单体、引发剂及其他助剂配制成光固化胶粘剂(UV胶),考察了聚氨酯中多元醇结构对UV胶固化速度、黏结强度、胶膜性能等的影响.结果表明,聚氨酯结构中软段结构对UV胶粘剂性能影响比较大,合理地选... 相似文献
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Vishal Gavande Seungjae Lee Donghyeok Im Saravanan Nagappan Chang‐Sik Ha Won‐Ki Lee 《Polymer International》2020,69(10):1008-1017
This study deals with the fabrication of a novel polyketone nanofiber‐reinforced UV‐curable polyurethane acrylate nanocomposite. An aliphatic polyketone nanofibrous mat was proficiently prepared by electrospinning using a solvent mixture of methylene chloride and trifluoroacetic acid. The outstanding characteristics of polymer nanofibers including a small pore size, a high aspect ratio and molecular orientation and an excellent mechanical performance offer the use of nanofibers as reinforcement in making nanocomposites. We fabricated a novel highly transparent and flexible nanocomposite film based on casting, electrospinning and UV‐curing processes. This method allowed significant enhancement of the mechanical properties using a very small amount (approximately 3.5 gsm) of polyketone nanofiber. The yield strength and Young's modulus of the nanocomposite were improved by up to 61% and 60%, respectively, compared to a UV‐cured polyurethane acrylate film. The reinforcing effect of nanofibers was accomplished without sacrificing the transparency and flexibility of polyurethane acrylate. The morphologies of the nanofibers and fiber–resin interface as well as the characteristics of the nanocomposite films were also studied. The effective use of nanofibers as a reinforcement and the preparation of a nanocomposite along with its characterization in comparison to a UV‐cured polyurethane acrylate film are also discussed. © 2020 Society of Chemical Industry 相似文献
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Glass laminates have been readily obtained by photocuring at ambient temperature of an acrylic adhesive consisting either of a liquid resin or a solid thermoplastic polymer. The light-induced polymerization process was followed by real-time infrared spectroscopy. Close to 100% conversion was reached within a few seconds of exposure, by taking as the photoinitiator an α-hydroxy alkylphenone or an aryl phosphine oxide. A liquid formulation containing an aliphatic polyurethane–acrylate oligomer, acrylic acid, and butyl acrylate gives the best performance in terms of reactivity, adhesion, impact resistance, and transparency. The impact resistance was further increased by introducing a polycarbonate core between the two glass plates. The solid thermoplastic polymer was obtained either by casting from a solution containing an aliphatic polyurethane, an acrylate oligomer, and the photoinitiator or by mixing these compounds in the molten state and further extrusion. The glass assembly was heated above the softening temperature (80°C) under a 1 MPa pressure and cured by a 1 min exposure to UV radiation to give a strongly adhesive laminate showing good transparency and long term weatherability. © 1995 John Wiley & Sons, Inc. 相似文献
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采用2-羟基-2-甲基-1-苯基-1-丙酮(Darocur 1173)作为超支化聚氨酯丙烯酸酯(HBUA)的紫外光(UV)固化引发剂,研究了Darocur 1173用量、活性单体种类及用量对HBUA固化膜机械性能的影响,并用光差扫描量热法(Photo—DSC)对HBUA的光固化动力学进行了表征。结果表明,随着Darocur 1173用量的增加,光固化膜的摆杆硬度及冲击强度增大,最大光固化反应速率Rp^max提高,到达Rp^max的时间缩短。己二醇二丙烯酸酯(HDDA)作活性单体更有利于提高光固化膜的机械性能,并有利于促进光固化反应的进行。Darocur 1173和HDDA的适宜用量分别为4%(wt)和20%(wt)。 相似文献
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针对环氧丙烯酸酯附着力和柔韧性差的缺点,通过在环氧丙烯酸酯中引入硅烷基团,合成硅烷改性的环氧丙烯酸酯。考察了各工艺参数对反应产品的影响,通过滴定和红外光谱分析跟踪反应进程和确定产物结构。合成产物通过和光固化单体、光引发剂混配成紫外光固化胶粘剂,并与改性之前的环氧丙烯酸酯作为主体树脂时的紫外光固化胶粘剂的性能进行了对比。研究发现,合成产物通过硅烷基团的引入,改善了环氧丙烯酸酯的柔韧性。同时,由于硅烷偶联剂基团在固化过程中水解露出的硅羟基增强了对无机底材的附着力,使得紫外光固化胶粘剂的综合性能得到了优化和改善。 相似文献
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Z97光敏胶粘剂的研制 总被引:6,自引:1,他引:5
合成了光反应性稀释剂烯丙基双酚A丙烯酸酯(AEDB),用这种稀释剂配制成Z-97光敏胶。该胶粘剂对玻璃的粘接强度及耐水性均较以甲基丙烯酸甲酯(MMA)做稀释剂配制的光敏胶有所提高。 相似文献