硅橡胶与金属钢热硫化粘接研究

为了实现较高粘接强度和易操作的硅橡胶与金属钢的热硫化粘接,研究了胶粘剂成分、金属试片的处理方式和硅橡胶配方对粘接性能的影响。结果表明,采用p H值为8.5的胶粘剂溶液,可以获得较高的粘接强度,采用含有机钛类催化剂和过氧化物催化剂的胶粘剂C,可以使甲基乙烯基硅橡胶(110-2)和苯基硅橡胶(120-1)的粘接强度提高到3.0 MPa以上;使用180μm(80目)和120μm(120目)的砂纸打磨金属试片,均可达到橡胶内聚破坏;硅烷偶联剂与硅橡胶共混,可适当提高粘接强度,但硅橡胶硬度增加较快,出现部分脆性撕裂,且试验件脱模处理困难;随着改性白炭黑含量的增加,110-2拉伸强度增大,剪切强度最大可接近4.0 MPa,提高了硅橡胶与金属热硫化粘接的强度和可靠性。     

热硫化型氟硅橡胶胶粘剂的耐热性能

研究了氟硅橡胶胶粘剂的热空气老化性能和高温粘接性能，结果表明，该胶粘剂用于氟硅橡胶与不同金属的热硫化粘接时，具有良好的耐热空气老化性能和高温粘接性能。     

用纳米SiO2改进环氧树脂胶粘剂性能的研究

对用无机纳米微粒改性环氧树脂胶粘剂的理论依据、无机纳米微粒的分散原理进行了分析和叙述。依据此理论,用混合法将纳米SiO2对环氧树脂胶粘剂进行了改性试验,取得了提高环氧树脂胶粘剂多项性能的良好结果。说明用无机纳米微粒改性环氧树脂胶粘剂是一个行之有效的方法。     

热硫化硅橡胶胶粘剂

北京航空材料研究院的郑诗建等人通过向低苯基硅橡胶中加入乙烯基三过氧叔丁基硅烷和气相法白炭黑等 ,配成了胶粘剂 ,解决了硅橡胶与金属的粘接技术难点。粘接件在室温下的粘接扯离强度达 2 9MPa ,在 2 5 0℃下的粘接扯离强度达 1 6MPa。热硫化硅橡胶胶粘剂     

硅橡胶粘接技术的研究

介绍了改善硅橡胶粘接性能的多种方法(硅橡胶表面改性、硅烷偶联剂改性、硅橡胶配方改性、硅胶粘剂改性和优化粘接工艺等)。最后对提高硅橡胶粘接性能的应用前景进行了展望。     

硅橡胶与钛合金粘接工艺研究

对硅橡胶与钛合金粘接的方法及工艺进行了研究.探讨了钛合金表面处理、胶粘剂种类、硫化条件、金属件预处理工艺等因素对粘接性能的影响,并给出了最佳粘接硫化工艺.     

(氟)硅橡胶-金属高温硫化粘接的研究

研究了（氟）硅橡胶与金属的高温硫化粘接,结果表明乙烯基三过氧叔丁基硅烷是硅橡胶（甲基乙烯基硅橡胶或氟硅橡胶）高温硫化粘接的良好增粘剂。溶液浸蚀分析证明硅橡胶与金属粘接界面的相互作用力包括色散作用和化学键作用。     

耐350℃有机硅胶粘剂

北京航空材料研究院研制了一种双组分室温硫化有机硅胶粘剂，工作温度为-60～350℃，颜色为红色或白色，固含量为100％，活性期为1～8h，可以粘接钢、铝、铜、钛合金等金属，也可以粘接硅橡胶和金属，对某些极性高分子材料也可以实现有效粘接。例如粘接硅橡胶和金属，250℃老化200h后室温粘接强度超过2．0MPa，250℃时的粘接强度超过1．0MPa；粘接金     

提高聚烯烃粘接性能的表面改性新技术

北京航空材料研究院研制了一种双组分室温硫化有机硅胶粘剂，工作温度为-60～350℃，颜色为红色或白色，固含量为100％，活性期为1～8h，可以粘接钢、铝、铜、钛合金等金属，也可以粘接硅橡胶和金属，对某些极性高分子材料也可以实现有效粘接。例如粘接硅橡胶和金属，250℃老化200h后室温粘接强度超过2．0MPa，250℃时的粘接强度超过1．0MPa；粘接金     

（氟）硅橡胶—金属高温硫化粘接的研究

研究了（氟）硅橡胶与金属的高温硫化粘接,结果表明乙烯基三过氧叔丁基硅烷是硅橡胶（甲基乙烯基硅橡胶或氟硅橡胶）高温硫化粘接的良好增粘剂。溶液浸蚀分析证明硅橡胶与金属粘接界面的相互作用力包括色散作用和化学键作用。     

Studies on The Modification of Epoxy Resin with Silicone Rubber

In order to find a compatibilizer for epoxy resin/silicone rubber systems, interfacial tension of epoxy resin mixed with modified silicone oils which had the compatible groups to epoxy resin was measured against RTV silicone rubber and silicone oil. From the results, it was found that one of polyether modified silicone oils (EtMPS) had strong interfacial activity. Then using the EtMPS as the compatibilizer, RTV silicone rubber or silicone diamine was filled in epoxy resin. The effects of silicone content of these materials on impact fracture energy and on peel strength were investigated. The impact fracture energy of epoxy resin was increased by the addition of RTV silicone rubber up to two times that of unmodified resin while silicone diamine had almost no effect which might be due to the small molecular weight. T-peel strengths of aluminium plates bonded by epoxy resin filled with RTV silicone rubber and with silicone diamine effectively increased with the increasing of silicone content showing the maximum at 10 ～ 20 phr. The fracture surfaces after the mechanical tests of these materials were observed by a scanning electron microscope. Many particles of silicone rubber in the size of 1 ～ 20 μ were observed over the fracture surface.     

Studies on The Modification of Epoxy Resin with Silicone Rubber

In order to find a compatibilizer for epoxy resin/silicone rubber systems, interfacial tension of epoxy resin mixed with modified silicone oils which had the compatible groups to epoxy resin was measured against RTV silicone rubber and silicone oil. From the results, it was found that one of polyether modified silicone oils (EtMPS) had strong interfacial activity. Then using the EtMPS as the compatibilizer, RTV silicone rubber or silicone diamine was filled in epoxy resin. The effects of silicone content of these materials on impact fracture energy and on peel strength were investigated. The impact fracture energy of epoxy resin was increased by the addition of RTV silicone rubber up to two times that of unmodified resin while silicone diamine had almost no effect which might be due to the small molecular weight. T-peel strengths of aluminium plates bonded by epoxy resin filled with RTV silicone rubber and with silicone diamine effectively increased with the increasing of silicone content showing the maximum at 10 ∼ 20 phr. The fracture surfaces after the mechanical tests of these materials were observed by a scanning electron microscope. Many particles of silicone rubber in the size of 1 ∼ 20 μ were observed over the fracture surface.     

增塑剂对硅橡胶硫化胶性能的影响

在确定硅橡胶基本配方的前提下，分析了增塑荆对硅橡胶硫化胶性能的影响。研究结果表明，试验中选用的酯类增塑剂和醇类增塑荆均能明显降低硅橡胶硫化胶的模量，但采用自制的环氧改性胶粘荆进行硅橡胶硫化胶与金属粘接时，含酯类增塑荆的硫化胶粘接效果较好。试样破坏形式为橡胶内聚破坏；而采用醇类增塑剂的硫化胶。粘接质量较差。试样破坏形式均为粘接面破坏。     

新型有机硅多元胺环氧树脂固化剂结构与性能

评价了3种有机硅多元胺APS、SFA和PSPA分别固化环氧树脂E51(DGEBA)时,固化物的力学性能和粘接强度,并与常见脂肪胺类固化剂[乙二胺、己二胺、聚醚胺(D-230)]作了对比。固化物基体力学和热性能测试表明,有机硅多元胺环氧固化物表现出较佳的冲击强度、弯曲强度和热稳定性。有机硅多元胺/环氧树脂胶粘剂的铁片粘接强度以及耐水性明显高于脂肪胺/环氧胶粘剂体系,其中含苯基有机硅多元胺作为固化剂时粘接强度最高,达到14.8 MPa。()     

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.     

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.     

高温硫化硅橡胶胶粘剂的研究

制备了一种有机硅胶粘剂,该胶粘剂主要由苯基硅橡胶与ＭＱ硅树脂组成,对影响该胶粘剂胶接强度的因素进行了研究。结果表明：该胶粘剂对铝有较好的胶接强度,其剪切强度与ＭＱ树脂的结构有很大关系,随ＭＱ树脂用量的增加而提高,催化剂的种类和用量对胶接强度也有影响。另外,该胶粘剂具有优良的耐高温老化性能以及对聚四氟乙烯较好的胶接性能。     

Adhesive strength and mechanisms of epoxy resins toughened with pre-formed thermoplastic polymer particles

The aim of this study was to characterize the adhesive properties of epoxy resins toughened with pre-formed polyamide-12 particles in comparison to the conventional approach using core–shell rubber particles. Dicyandiamide-cured diglycidyl ether of bisphenol-A was used as the base epoxy resin. The T-peel adhesive strength of the toughened resin containing 20 phr polyamide-12 particles was about 3-times higher than that of the unmodified resin. In the case of rubber toughening, the improvement in adhesive strength tended to reach a plateau, even after improvement in the resin toughness itself. Besides, the polyamide particle toughening utilizes the bulk resin toughness for the peel adhesive strength, even in a thin adhesive layer between the substrates. The polyamide particles embedded in epoxy resin matrix were fractured after bridging cracks and stretching in the peel process. The crack-bridging mechanism by the pre-formed thermoplastic polymer particles was operative behind the crack-tip and would, therefore, experience a relatively small constraint by the presence of rigid metal substrates in comparison to conventional rubber toughening. The requirements for the polymer particles to work as a modifier using the bridging mechanism would be good adhesion to the epoxy matrix, high toughness and a relatively lower modulus of elasticity than that of matrix resin.     

有机硅纳米杂化改性环氧胶的研制和应用

通过溶胶-凝胶法制备了纳米有机硅溶胶。用透射电镜和红外光谱表征和分析了纳米粒子的形态和粒径,粒径为30－70nm。制备了用活性稀释剂糠醛和丙酮及有机硅纳米杂化改性的环氧胶。研究了胶液的初始黏度、渗透性、力学强度、弹性模量、粘接性、表面疏水性和防腐蚀性能。实验结果表明,环氧树脂含量、有机硅溶胶、硅烷偶联剂等对改性环氧胶的这些性能有显著影响,改性环氧胶双组分混合液的初始黏度可低至1.1mPa·s,渗透性强,固结体抗压强度高达40．8－81．5MPa,弹性模量为1．3－2．1×10^3MPa,剪切粘接强度5．1－11．9MPa,防水抗渗性及防腐蚀耐候性良好,可应用于灌浆防水加固补强、工业地坪涂料和防腐蚀涂料等多种用途。     

Application of a new modified epoxy adhesive for bonding fluorine rubber to metal

Adhesion of fluorine rubber to metals is an important issue. The aim of this work was to develop a new kind of adhesive for bonding fluorine rubber to metals. A new modified epoxy adhesive containing a special tackifier resin obtained from polysulfones with a high heat deflection temperature (HDT) was prepared. Study on the curing behavior of the adhesive was carried out. Properties of the adhesive and the effects of several main factors were studied by gelation time test, differential scanning calorimetry (DSC) and Fourier transform infrared (FT-IR) spectroscopy. The optimum amount of the tackifier resin was found to be 50 phr; the average tensile lap shear strength could be achieved to a level of 8–10 MPa. Infrared attenuated total reflection (IRATR) spectroscopy indicated that the tackifier resin accelerated the establishment of epoxy resin adhesion to steel, and also promoted bonding and vulcanization of fluorine rubber. Easy diffusion of cyanamide (decomposition compound of dicyandiamide (DICY) in the curing process) into epoxy resin and fluorine rubber facilitated the dissolution and reaction of DICY, and also promoted formation of complex bond between fluorine rubber and adhesive, hence an enhanced adhesion of fluorine rubber to metal was achieved.