用于特种印花的特殊粘合剂

介绍用于特种印花的高粘度混合型粘合剂。述评了金光粘合剂、珠光粘合和银光粘合剂、夜光粘合剂和反光粘合剂、发泡粘合剂和起绒粘合剂、固体物质的转移印花粘合剂、透明粘合剂与消光粘合剂等特殊粘合剂,以及它们加工的适应性。     

叠氮类含能粘合剂研究进展

粘合剂含能化是火炸药未来的发展方向,叠氮类粘合剂是含能粘合剂中的典型代表。该文主要从热塑性含能粘合剂和热固性含能粘合剂两方面综述了近5年叠氮类粘合剂研究进展,并对该类粘合剂的发展趋势和应用前景进行了展望。     

聚氨酯提高环氧粘合剂性能

传统的商业环氧粘合剂易脆断,而拜耳材料科技最新研究表明,加入聚氨酯后,环氧粘合剂变得更坚韧耐用。这种混合物利用了聚氨酯的韧性,形成的复合粘合剂降低了传统单一粘合剂的易脆断性。通过在环氧粘合剂中加入聚氨酯预聚物,改善了粘合剂     

关于GAP的研究进展

综述了聚叠氮缩水甘油醚(GAP)增塑剂及GAP粘合剂的合成方法,将GAP基粘合剂分类为GAP基热固性含能粘合剂以及GAP基热塑性含能粘合剂,其中GAP基热固性含能粘合剂主要包括了GAP共混改性、支化GAP基热固性含能粘合剂,GAP基热塑性含能粘合剂主要包括了嵌段型GAP基、接枝型GAP基热塑性含能弹性体。对应用更为广泛的GAP基热塑性含能粘合剂的发展趋势和应用前景进行了展望。     

关于对医用粘合剂的研究

随着医学技术的不断发展,有关医用粘合剂的研究也在不断发展,本文通过对对医用粘合剂的分类,从不同方面介绍了医用粘合剂的发展,本文详细介绍了软组织用粘合剂、牙科粘合剂、骨科用粘合剂、皮肤用压敏胶的研究和应用。     

关于GAP的研究进展

综述了聚叠氮缩水甘油醚(GAP)增塑剂及GAP粘合剂的合成方法,将GAP基粘合剂分类为GAP基热固性含能粘合剂以及GAP基热塑性含能粘合剂,其中GAP基热固性含能粘合剂主要包括了GAP共混改性、支化GAP基热固性含能粘合剂,GAP基热塑性含能粘合剂主要包括了嵌段型GAP基、接枝型GAP基热塑性含能弹性体。对应用更为广泛的GAP基热塑性含能粘合剂的发展趋势和应用前景进行了展望。     

紫外光UV固化粘合剂

紫外光固化粘合剂随着紫外光固化技术的发展获得了快速发展。详细介绍了紫外光固化粘合剂的应用机理及其组成成份 ,如齐聚物、反应单体、光引发剂。并列举了几种不同类型的紫外光固化粘合剂 ,即层压粘合剂、压敏粘合剂和双重光固化粘合剂等。     

紫外光固化粘合剂的发展

紫外光固化粘合剂随着紫外光固化技术的发展获得了快速发展。本文从应用角度评述了紫外光固化粘合剂的组成。诸如：可聚合齐聚体,活性单体,光引发剂等,并主要介绍了两种紫外紫外光固化粘合剂,即层压粘合剂和压敏粘合剂。提出了发展我国上光固化粘合剂的几点建设。     

型煤与焦粉型焦粘合剂的研究及应用

探讨了型煤粘合剂的粘结机理 ,介绍了几种主要粘合剂的分类 ,重点论述了WIN -1型民用与锅炉型煤粘合剂、WIN - 2超微粉造气型煤粘合剂及WIN - 3焦粉型焦粘合剂的研究和应用情况 ,利用这些粘合剂生产的锅炉型煤、造气型煤、焦粉型焦等产品均达到了应用要求     

高性能环氧树脂粘合剂的改性方法及结构与性能的关系

从结构与性能的关系着手,综述了近年国内外高性能环氧树脂粘合剂改性研究的最新进展,主要包括环氧树脂粘合剂的二氧化硅纳米粒子改性、环氧树脂粘合剂的石墨烯改性、环氧树脂粘合剂的纤维和碳纳米管改性、环氧树脂粘合剂的橡胶改性以及环氧树脂粘合剂的其他改性。同时对高性能环氧树脂粘合剂今后的发展趋势进行了分析与展望。研制开发绿色无污染的高性能和功能性的新型环氧树脂粘合剂将是今后该领域的主攻方向。     

考虑胶层的自由型垫高阻尼结构振动特性研究

考虑胶层在自由型垫高阻尼结构中传递应力、应变的作用,将胶层等效为各向同性材料,采用ANSYS和MATLAB的联合仿真方法,分析含胶层的自由型垫高阻尼结构振动特性随胶层参数的变化规律。利用模态应变能法和控制变量法得到的结果表明,胶层对结构振动特性起着关键性的作用,因此,选择胶粘剂敷设自由型垫高阻尼结构时,应在保证胶层力学环境良好的前提下,选择满足胶层最佳特性区间的胶粘剂产品。     

火箭推进剂用硅橡胶胶粘剂：固药胶的研制

采用互贯网络改性技术，研制成功力学性能优良，粘接性能良好，有弹性，粘度小，流动性好的室温硫化固药胶，并已成功地用于某型号反垣克火箭武器。     

胶层厚度对双搭接胶连接接头承载力的影响分析

基于Hart-Smith对双搭接胶连接接头承载力计算公式的推导,分析了胶层最大剪应变(剪应力)和接头所承受荷载的对应计算关系;结合理论推导和试验详细分析了胶层厚度对此类接头承载力的影响,提出可以用"剥离临界值"判断剥离应力是否会导致接头破坏;以胶层最大剪应变(剪应力)与接头所承受荷载的对应计算关系为基础,结合"剥离临界值"完善了双搭接胶连接接头的承载力计算公式。     

有机硅改性环氧结构胶的制备

环氧树脂E - 42用有机硅树脂改性后 ,既具有环氧树脂的良好的机械性能又具有有机硅树脂的耐热性 ,同时 ,用聚乙烯醇缩丁醛改进了环氧树脂结构胶的脆性 ,提高了胶粘剂的韧性。所制备的胶粘剂性能优良 ,室温下剪切强度达 18MPa以上 ,能在 15 0℃以下长期使用 ,且适用于粘接多种材料     

EFFECT OF A REACTIVE INTERFACIAL AGENT ON THE PROPERTIES OF A NITRILE-RUBBER-MODIFIED EPOXY FILM ADHESIVE

Reactive interfacial agents are often used to homogenise the morphology of immiscible polymer blends and to improve the level of adhesion between the phases to achieve enhanced properties. This paper demonstrates the ability of hydroxyl methyl bisphenol A (HMBPA) to function as a reactive interfacial agent (compartibilizer) in a nitrile-epoxy film adhesive made from nitrile rubber (NBR) and solid epoxy resin blend. The curing of the adhesive film was achieved at 170° C by adding dicyandiamide, a latent curing agent for epoxy resin, and rubber vulcanising agents. Hydroxyl methyl bisphenol A resins with different hydroxyl methyl content, synthesised by the base-catalysed reaction of bisphenol A and formaldehyde in various mole ratios, were used to compatibilize a blend of nitrile rubber (NBR) and epoxy resin 50/50wt/wt. The effect of addition of HMBPA on the morphology, adhesive, thermal, and mechanical properties of the adhesive film was investigated. The nitrile-epoxy adhesive films were characterised by measurements of adhesive joint strength, stress-strain properties, DSC, TGA, TMA, DMA, and SEM. Results revealed that significant improvement in joint strength occurred at low levels of HMBPA, and the optimum strength was obtained at about 15 wt% of HMBPA in the blend. The hydroxyl methyl content in HMBPA was found to influence the properties of the adhesive film. The concept of strengthening the interphase between NBR and epoxy through the coupling reactions of HMBPA was used for interpreting the results. The effect of addition of silica, alumina, and aluminium fillers on the properties of the nitrile-epoxy adhesive film was also studied, and a comparison of properties with and without HMBPA is presented.     

THE DEVELOPMENT OF A MANDREL PEEL TEST FOR THE MEASUREMENT OF ADHESIVE FRACTURE TOUGHNESS OF EPOXY-METAL LAMINATES

A mandrel peel test is established for measuring the adhesive fracture toughness of a metal/rubber-toughened epoxy laminate system. By adopting an energy balance analysis it is possible to determine directly both adhesive fracture toughness and plastic work in bending the peel arm around the mandrel. The suitability of the procedure is examined for various types of metal peel arms, which are classified in terms of their ability to deform plastically during the test. The plastic work is also predicted theoretically, and comparisons are made between the measured and calculated values. The fracture energies determined from the mandrel tests are compared with those obtained from 90° fixed-arm peel tests. For the calculations of plastic work in bending in the fixed arm test, various options are used when modelling the tensile stress-strain behaviour of the peel arm material. In addition, the adhesive layer thickness is considered in terms of its influence on the calculation of adhesive fracture toughness.     

CUA-001高级铝箔纸胶粘剂的研制

研制了一种高级铝箔纸胶粘剂。对影响胶粘剂性能的各种因素进行了探讨与选择,确定了最佳工艺条件。本产品已用于铝箔纸的实际生产,其主要性能指标已达到或超过了日本同类进口产品水平。     

双氧水对淀粉的氧化性能研究

从H2O2对淀粉分子链的氧化机理开始,深入分析了淀粉分子链的酸化降解－催化氧化－糊化的整个过程及相关机理,并对粘合剂的稳定性及主要影响因素进行了深刻讨论,对制备性能优良,储存稳定的粘合剂有很好的指导作用。     

STRENGTH OF ADHESIVE JOINTS WITH ADHEREND YIELDING: I. ANALYTICAL MODEL

A sandwich element can be isolated in all two-dimensional adhesive joints, thereby simplifying the analysis of strain and stress. An adhesive sandwich model has been developed that accommodates arbitrary loading, a bilinear adherend stress-strain response, and any form of nonlinear adhesive behavior. The model accounts for both the bending deformation and the shear deformation of the adherends. Stress and strain distributions in the adhesive were obtained by solving a system of six differential equations using a finite-difference method. For a sample adhesive sandwich, the adhesive strains and stresses from the new model were compared with those of other models. Finally, the model was coupled with an analytical solution for the detached section of an adhesive joint in peel. The stress and strain distributions in the adhesive and the root curvature of the peel adherend were then compared with finite element results. An accompanying article in this issue uses the model with experimental peel data to investigate the suitability of various adhesive failure criteria.     

THE DEVELOPMENT OF A MANDREL PEEL TEST FOR THE MEASUREMENT OF ADHESIVE FRACTURE TOUGHNESS OF EPOXY–METAL LAMINATES

A mandrel peel test is established for measuring the adhesive fracture toughness of a metal/rubber-toughened epoxy laminate system. By adopting an energy balance analysis it is possible to determine directly both adhesive fracture toughness and plastic work in bending the peel arm around the mandrel. The suitability of the procedure is examined for various types of metal peel arms, which are classified in terms of their ability to deform plastically during the test. The plastic work is also predicted theoretically, and comparisons are made between the measured and calculated values. The fracture energies determined from the mandrel tests are compared with those obtained from 90° fixed-arm peel tests. For the calculations of plastic work in bending in the fixed arm test, various options are used when modelling the tensile stress-strain behaviour of the peel arm material. In addition, the adhesive layer thickness is considered in terms of its influence on the calculation of adhesive fracture toughness.