Z97光敏胶粘剂的研制

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。     

全色光敏玻璃

我们早已对胶态金属的色彩予以青睐。过去对胶态金、银和铜着色的光敏硅酸盐玻璃以及采用一种或多种此类金属核化的白色或着色的乳浊光敏玻璃和含有胶态卤化银的光致变色玻璃已有过介绍。在研究某些含银的氟化钠乳白色光敏玻璃时,当在产生光·乳浊效应     

光学玻璃的胶接试验

玻璃和金属的胶接已经有十分成功的方法。可是,光学玻璃的胶接方法不很成熟。因为它不仅要求有一定的胶接强度,更重要的是要求玻璃的光学性能不因胶接而发生变化。产生光学性能变化的因素很多,其中一个重要原因是胶粘剂在固化过程中发生体积收缩。例如环氧树脂在固化过程中体积收缩大约5%左右。在凝胶化以前,体系     

胶接接头无损检测研究进展

介绍了胶接接头无损检测技术近年来的发展情况，对超声波、声、应力波等无损检测技术的发展作了概要的阐述，同时对胶接接头的强度检测进行了分析，认为检测中所选用的强度相关参数，应充分体现胶接接头对应力的响应，这样才可能实现胶接强度的定量检测。     

影响胶粘剂胶接性能的因素分析

本文通过不同胶层厚度、胶接真空度、胶接夹持距离等因素分析影响胶粘剂胶接强度的原因,通过试验,表明随着胶层厚度的增加,胶接强度先增加然后再减小。加大真空度能提高胶接强度,但达到极限后随着真空度的提高胶接强度反而减小。通过点加压也能提高胶接强度,而且随着夹持距离的减少,胶接强度逐渐增大。     

输送带热硫化胶

由湖北省宜昌市葛洲坝粘合剂开发公司推出的输送带热硫化胶，该产品是由硫化胶浆和硫化胶片组成，具有阻燃性、粘接强度高，流动性好、易涂刷、干燥速度快等特点。该胶广泛用于各种橡胶输送带，钢芯输送带、整芯输送带、尼龙、帆布、聚酯输送带接头硫化胶接，特别适应上述输送带在高温环境下接头硫化胶接。     

阻燃型MEPA3光敏胶的研制

研制了折光率为1.5230,透明性好的无溶剂紫外线固化型结构胶。该胶对玻璃、塑料及金属的粘结强度高,玻璃接头在沸水中煮沸500h,在海水、酸液及碱液中室温浸泡4个月也不发生胶接界面的剥离,具有优良的耐热水、耐介质的粘接性,而且此胶的氧指数为43,具有良好的阻燃性。可开发应用于光学通信、电子、电气、汽车、机械等领域。     

材料因素对胶接强度的影响

为了认识金属板和硫化橡胶的胶接机理及寻求其防止方法,本文研讨了材料因素对胶接强度的影响,金属的种类将影响初粘强度(FS_0),硬度低者,其初粘强度的值亦低下。胶接强度(FS)受橡胶极性的影响。但是,经过一定时间后(2天)影响将减小。炭黑和白炭黑等填充剂对胶接强度的影响与其对硫化的作用有关,前者(炭黑)促进胶接,而后者(白炭黑)则抑制胶接。硫黄及过氧化物等硫化剂的用量和种类对胶接有影响。一般,这些硫化剂提供了同金属反应的组份。此时,胶接强度就得以提高。使用能提供多硫交联键和侧链的促进剂或者提供胺和巯基苯并噻唑等硫化残留物的促进剂的硫化橡胶显示出高胶接强度。另外,通用防老剂和润滑剂对金属和硫化橡胶的反应无促进作用,也不影响胶接。     

高真空用高导热高强度胶粘剂(C—28胶)的探讨

本文对C—28胶粘剂各组份进行了精选和工艺处理,使胶粘剂达到了超高真空密封性能和高导热性能;提出了缩小玻璃与金属胶接强度测试数据分散性较大的措施;并采用温度每提高8度寿命减半的方法加速胶粘剂老化。     

飞机胶接修理中的补板厚度优化

为了提高飞机机体损伤应急快速胶接修理的质量和效率，利用弹塑性有限元分析及试验方法探讨了胶接修补飞机蒙皮时补板厚度对胶接补强水平的影响。发现合理选取补板厚度可明显提高胶接修补的补强水平，进而提高修复结构的强度，一般情况下，取补板厚度小于蒙皮板厚度。这一新的胶接修补技术在不改变原有的修补工艺、材料、设备的前提下，可提高胶接修理的水平、机体结构的强度．减轻飞机结构质量，简化操作，降低成本。     

Bone adhesives for trauma surgery: A review of challenges and developments

The idea of being able to glue bone fragments with a suitable biocompatible adhesive remains highly attractive to orthopaedic surgeons. Yet despite decades of research, no suitable system that fully meets all the many requirements for such an adhesive has yet been identified. This article reviews the requirements and challenges of developing a bone adhesive for fracture repair and also the substantial progress that has been made. Developments in bone adhesives can roughly be classified into two groups: synthetic and biologically-derived/inspired. Early examples of synthetic adhesives include poly(methyl methacrylate) and related polymers, cyanoacrylates and polyurethanes. These materials are characterised by relatively good mechanical properties but often lack the required biocompatibility and biodegradability. More recent adhesive systems based on lactide–methacrylate chemistry therefore attempt to address these issues. Similarly, there is renewed interest in glass ionomer cements and calcium/magnesium phosphate cements. Biological adhesives include fibrin and gelatin-based systems. These have good biocompatibility and biodegradability but lack the cohesive strength to have good adhesion to bone and are used chiefly in soft tissue applications. Newer examples that are looking more promising include adhesives inspired by mussel adhesive proteins and the “sandcastle glue” of the marine worm Phragmatopoma californica. As well as the challenge to develop the adhesive systems themselves a further need is for greater consistency in the testing of adhesion to bone both in vitro/ex vivo and in vivo. Test methods in the literature are reviewed together with considerations for the design of such tests.     

The role of interfacial interactions and loss function of model adhesives on their adhesion to glass

The measurement of adhesion and the evaluation of influencing factors are of great scientific and technological importance. There are two distinct viewpoints on adhesion: (i) surface chemistry, and (ii) fracture mechanics. For elucidation of the relative importance of mechanical properties in the bonding of adhesives, the strength of adhesion between model adhesives and glass plates was measured by the wedge cleavage (WC) test method. Copolymers of methyl methacrylate (MMA) with n-butyl acrylate (nBA) and methyl methacrylate with styrene (S) were prepared as model adhesives. The results show that in MMA-nBA copolymers, by increasing the amount of nBA, both the loss function and the adhesion energy of the adhesives increase. However, by increasing the amount of nBA above a certain level, the adhesion strength begins to decrease. In this situation, the cohesive strength of the adhesive dominates the failure mechanism. On the other hand, a decrease in adhesion was expected upon increasing the amount of styrene in the poly(styrene-co-methyl methacrylate) adhesive, because methyl methacrylate, an interactive monomer with glass, is replaced by a non-interacting styrene monomer, while the loss function of the adhesive is almost constant. But our practical adhesion measurement technique was not sensitive enough to detect this adhesion loss.     

ZUV系列紫外光固化胶黏剂的制备与应用

紫外光固化胶黏剂是近年来发展较快的一种胶黏剂,它是利用紫外光引发具有化学活性的液态材料快速聚合交联,数秒内固化成膜,是一种高性能、高效率的胶黏剂。通过合成预聚物,用活性稀释剂进行改性,并配合加入各种光引发剂的方法,制备了ZUV系列紫外光固化胶黏剂。该系列紫外光固化胶黏剂具有固化速度快、粘接强度高、抗震性好等优点。按照定位时间的快慢我们将其分为ZUV-X,ZUV-3188,ZUV-5188等三个品种,它们已广泛应用于金属、玻璃、水晶、石材等多种材料的粘接,具有较好的社会经济效益。     

UV-Curable Adhesives For Optical Communications

UV-curable optical adhesive systems featuring refractive indices in the 1.45 to 1.59 region controllable to within 0.005 are developed using new fluoro-epoxies and fluoro-epoxy (meth) acrylates. These adhesives possess excellent refractive index matching with optical glass and optical fibres, and the joints exhibit high bonding strength and good durability. These high performance adhesives are readily applicable as optical adhesives in fabricating optical components, attaching fibres to optical waveguides, and splicing optical fibres for optical communications.     

Evaluation of adhesion strength,flammability, and degradation of HBCD‐containing polyurethane adhesives

In this work, moisture curable flame retardant HTPB‐based polyurethane adhesives were synthesized. The influence of HBCD (Hexabromocyclododecane) as flame retardant on adhesion, degradation and change in flammability of synthesized HTPB‐based polyurethane has been studied. Relationship between phase separation in hard and soft domains and adhesion has also been investigated. FTIR analysis was used to determine phase separation in synthesized adhesives. Lap shear test was used to determine adhesion properties of adhesives applied on aluminum and glass substrates. Thermal Gravimetry analysis and Limited Oxygen Index (LOI) tests were carried out on flame retardant adhesives to evaluate effect of HBCD on degradation and flammability. Addition of HBCD to adhesives leads to reduction of thermal stability and lap shear strength for all substrates, in spite of flame retardant adhesives show higher LOI value. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008     

Primers for Bonding Polyolefin Substrates with Alkyl Cyanoacrylate Adhesive

Polyolefins, such as polypropylene and polyethylene, are among the most commonly-utilized plastics in the world, but, because of their non-polar surfaces, are among the most difficult to bond with adhesives. A surface treatment is required before adhesive application to achieve good adhesion.

Alkyl cyanoacrylates are widely used instant adhesives, e.g. Super Glue^®, for bonding a variety of substrates, such as metal, plastics, glass, wood, and leather. It would be desirable to bond polyolefins with these adhesives because of their availability and ease of use. Amines and ammonium carboxylates, possessing long alkyl chains, were evaluated as adhesion promoting primers for alkyl cyanoacrylate adhesives on polyolefins.

Among trialkyl amines, trialkylammonium carboxylates, and tetraalkylammonium carboxylates, trialkylammonium carboxylate primers produced an adhesive bond so strong that the failure occurred at the polyolefin substrate. Trialkylammonium carboxylate primers also demonstrated excellent performance retention over prolonged atmospheric exposure prior to application of the adhesive. Trialkyl amines and tetraalkylammonium carboxylates also promoted adhesion but lost maximum effectiveness on exposure to the atmosphere. The cause of the deterioration in amine primer effectiveness over prolonged exposure was identified to be trialkylammonium bicarbonate formation and/or diffusion of the primer into the polyolefin surface.     

装饰胶黏剂现状及发展趋势

简要介绍了装饰胶黏剂的现状及国内外状况,重点介绍了SBS型和氯丁型装饰胶黏剂.对两种胶黏剂的基本组成、特性、分类、性能的提高及发展前景分别进行了阐述,指出SBS装饰胶黏剂对多种材料都具有良好的粘接性能,可与传统的氯丁型胶黏剂相媲美,同时提出了改进SBS装饰胶性能的措施.SBS胶黏剂综合性能优良,不仅是环境友好型胶黏剂,而且是今后装饰胶黏剂的主要发展趋势,用途不断扩大,具有良好的市场前景.     

Primers for Bonding Polyolefin Substrates with Alkyl Cyanoacrylate Adhesive

Polyolefins, such as polypropylene and polyethylene, are among the most commonly-utilized plastics in the world, but, because of their non-polar surfaces, are among the most difficult to bond with adhesives. A surface treatment is required before adhesive application to achieve good adhesion.

Alkyl cyanoacrylates are widely used instant adhesives, e.g. Super Glue^®, for bonding a variety of substrates, such as metal, plastics, glass, wood, and leather. It would be desirable to bond polyolefins with these adhesives because of their availability and ease of use. Amines and ammonium carboxylates, possessing long alkyl chains, were evaluated as adhesion promoting primers for alkyl cyanoacrylate adhesives on polyolefins.

Among trialkyl amines, trialkylammonium carboxylates, and tetraalkylammonium carboxylates, trialkylammonium carboxylate primers produced an adhesive bond so strong that the failure occurred at the polyolefin substrate. Trialkylammonium carboxylate primers also demonstrated excellent performance retention over prolonged atmospheric exposure prior to application of the adhesive. Trialkyl amines and tetraalkylammonium carboxylates also promoted adhesion but lost maximum effectiveness on exposure to the atmosphere. The cause of the deterioration in amine primer effectiveness over prolonged exposure was identified to be trialkylammonium bicarbonate formation and/or diffusion of the primer into the polyolefin surface.     

A study on UV-curable adhesives for optical pick-up: II. Silane coupling agent effect

Ultraviolet curable optical pick-up adhesive composites composed of acrylic and methacrylic mono-, bi- and trifunctional monomers and two kinds of urethaneacrylate oligomers have been easily prepared. In this paper, we studied the influence of various silane coupling agents to enhance the adhesion property in thermal and humid conditions by acting as both inorganic surface and organic polymer modifiers. Among them, vinyltriethoysilane (VTES) provides good adhesion effects on acrylate binder as well as silica surface. VTES added adhesives were studied by the real time FT-IR. The reliability of adhesives was explained by thermal-mechanical analysis (TMA) and then durability was tested by water boiling test. These UV-adhesives were successfully applied and settled in CD and DVD optical pick-up bodies in commercial application.     

改性胺催化固化环氧树脂的研究

研究将脂肪胺预先与酮类形成酮亚胺后催化固化环氧树脂的一些力学性能。实验表明，酮亚胺作环氧树脂固化剂配制时反应温和不易爆聚，并且起始黏度低．渗透性好，固结体压缩强度和粘接强度高，韧性好，破坏时的压缩形变可达20％以上。酮亚胺改性后掺入催化剂C1促进环氧树脂的固化，固结体强度大大提高，压缩强度达130MPa，粘接铁片的拉伸剪切强度为16．1MPa。