聚烯烃与金属粘接用CR/CPE-g-MAH胶粘剂的粘接性能的研究(英文)

采用氯丁橡胶（ＣＲ）和ＭｇＯ与氯化聚乙烯接枝马来酸酐（ＣＰＥ－ｇ－ＭＡＨ）共混,制得聚丙烯（ＰＰ）与金属粘接用胶粘剂,室温固化就能获得较高强度。探讨了ＣＲ和ＭｇＯ含量对胶粘剂粘接强度的影响,并考察了这种胶粘剂的耐水性。研究表明,加入ＣＲ和填料有助于提高粘接强度,当ＣＲ／ＣＰＥ－ｇ－ＭＡＨ的质量比为１∶１,且ＭｇＯ含量为３５％时,粘接强度最大,并具有优良的耐水性。     

SBS／MMA—BA自交联型接枝共聚物及其性能研究

在交联单体Ｎ－ＭＭＡ存在下，研究了ＳＢＳ／ＭＭＡ－ＢＡ四元枝共聚反应及其产物性能，讨论了引发剂浓度、Ｎ－ＭＭＡ用量、单体配比、反应时间及反应温度对接枝聚合影响，获得了最佳合成工艺条件。通过红外光谱和ＰＶＣ／ＳＢＳ粘接性能测试表明，共聚物具有初粘力大、剥离强度高、使用方便等特点。     

聚丙烯酰胺改性聚乙烯醇缩甲醛胶粘剂的研制

介绍了聚丙烯酰胺（ＰＡＡｍ）对聚乙烯醇（ＰＶＦ）胶粘剂的改性方法，研究了ＰＡＡｍ对ＰＶＦ胶粘剂的粘度、粘接强度、游离甲醛含量等性能指标的影响。研制出的ＰＶＦ／ＰＡＡｍ胶粘剂成本低，各项性能指标均达ＪＣ４３８－９１ＰＶＦ胶粘剂产品质量标准。     

彩电国产化阻燃型配套材料──D－15（CMA－319D）胶粘剂

彩电国产化阻燃型配套材料──Ｄ－１５（ＣＭＡ－３１９Ｄ）胶粘剂上海橡胶制品研究所研制的Ｄ－５（ＣＭＡ－３１９Ｄ）胶粘剂，具有阻燃性、不流淌、对ＴＢＰ等塑料具有良好的粘接性能和良好的绝缘性能。该胶粘剂经永新彩管公司装管试验和粘接管基试验，其粘接性能符合...     

聚氨酯胶粘剂的粘接性与碳原子数的关系

本文通过聚己二酸二丁酯（ＰＢＡ）、聚己二酸乙二酯（ＰＥＡ）、聚四氢呋喃二醇醚（ＰＴＭＧ）、聚丙二醇醚（ＰＰＧ）、聚ε－己内酯（ＰＣＬ）与ＴＤＩ的反应实例，讨论了聚氨酯胶粘剂的粘接性。指出聚氨酯软段单元结构的碳原子数有主宰其粘接功能的功能。聚氨酯胶粘剂对极性高分子材料的粘接，其软段上必须有４个以上碳原子数。     

聚丙烯酸丁酯-丙烯酸/苯乙烯辐射接枝共聚物粘接性能的研究

采用过氧化预辐射法将生产高分子特效膜残留下的废苯乙烯（Ｓｔ）与聚丙烯酸丁酯－丙烯酸（ＰＢＡ－ＡＡ）接枝，制得ＰＢＡ－ＡＡ／Ｓｔ接枝共聚物。比较了辐射法和化学法所制接枝共聚物的粘接性能，考察了Ｓｔ含量、丙烯酸丁酯（ＢＡ）／ＡＡ共聚物特性粘度、ＡＡ用量、ＢＡ和Ｓｔ预辐射剂量对接枝共聚物粘接性能的影响。结果表明，采用辐射法所制接枝共聚物的粘接性能优于化学法所制接枝共聚物的粘接性能；废Ｓｔ比纯Ｓｔ效果好；当Ｓｔ含量为３３％、ＢＡ／ＡＡ共聚物特性粘度适中、ＡＡ用量为５．５份（ＢＡ用量固定为１００份）、ＢＡ预辐射剂量为１６．０ｋＧｙ、Ｓｔ预辐射剂量为３２．０ｋＧｙ时，制得的接枝共聚物的粘接性能最为理想     

超高分子量聚乙烯纤维粘接性的研究

初步研究了拉伸倍率、共混改性、化学试剂表面处理对超高分子量聚乙烯（ＵＨＭＷ－ＰＥ）纤维粘接性和强度的影响。结果表明，用铬酸洗液对ＰＥ纤维进行物理和化学改性，是改善ＵＨＭＷ－ＰＥ纤维／环氧树脂粘接性较为有效的方法。     

CR/MMA-AA自交联型接枝共聚物的合成与粘接性能研究

在交联单体Ｎ－羟甲基丙烯酰胺（Ｎ－ＭＡＡ）存在下,研究了氯丁橡胶（ＣＲ）／甲基丙烯酸甲酯（ＭＭＡ）－丙烯酸（ＡＡ）三元接枝共聚及产物性能,结果表明,在引发剂 为１．６￣２．０％,Ｎ－ＭＡＡ用量为２．２￣２．６％,ＡＡ（ＡＡ＋ＭＭＡ）（质量比）为１４％,反应时间为５ｈ,反应温度为８０￣８５℃时,产物的性能较优。对产物还进行了红外光谱表征和粘接性能测试。     

低压缩永久变形氟橡胶与铝合金粘合的研究

研究ＫＨ５５０、ＫＨ５６０、Ａ－１５１三种硅烷偶联剂以及ＴＡＩＣ和２，５－二甲基－２，５－二叔丁基过氧己烷硫化助剂对低压缩永久变形氟橡胶胶料硫化的影响，分析了上述五种材料有机官能团参与交联反应的活性。采用以ＫＨ５６０为主配制的胶粘剂可良好地将铝合金与低压缩永久变形氟橡胶粘接，同时对铝合金表面的处理作了一定的研究，解决了目前快速硫化的低压缩永久变形氟橡胶与铝合金粘接的难点。     

含叔氨基聚氨酯／聚丙烯酸共混体系的相容性

以聚四氢呋喃，４，４‘－二苯基甲烷二异氰酸酯和Ｎ－在二乙醇安为单体，采用预聚、扩链两步法合成了含叔在聚氨酯（ＮＰＵ），并将其与聚丙烯酸（ＰＡＡ）。用动态力学分析、示差扫描量热法和应用－应变实验测试技术，研究了ＮＰＵ／ＰＡＡ共混体系的相容性及力学性能。实验结果表明，随ＰＡＡ质量分类增大，共混物的软段相Ｔｇ向低温方向移动的程度增大；在ＮＰＵ中加入ＰＡＡ可明显改善其力学性能，当加入灰５％的ＰＡＡ后，共     

纳米SiO_2改性聚氨酯胶粘剂的制备及性能研究

采用预聚体一步法制备了单组分湿固化nano-SiO2(纳米SiO2)改性PU(聚氨酯)胶粘剂,并利用红外光谱(FT-IR)法、热失重分析(TGA)法、差示扫描量热(DSC)法和扫描电镜(SEM)等对nano-SiO2改性PU胶粘剂的性能进行了分析和探讨。结果表明:纳米粒子的存在使PU的氢键结构发生了变化;随着nano-SiO2含量的不断增加,改性PU胶粘剂的初始粘接强度和最终粘接强度均呈先升后降态势,并且在w(nano-SiO2)=1.2%(相对于PU预聚体质量而言)时相对最大,而且分别比纯PU胶粘剂增加了117%和108%;同时,与纯PU胶粘剂相比,用1.2%nano-SiO2制备的PU胶粘剂,其熔融温度和分解温度分别提高了2.67℃和2.92℃;当w(nano-SiO2)≤1.2%时,nano-SiO2在PU胶粘剂基体中的分散性相对较好。     

聚氨酯胶粘剂在汽车驾驶室玻璃装配中的应用

介绍了TOTALSEAL聚氨酯胶粘剂在G系列驾驶室玻璃装配中的应用，说明了驾驶室生产中的驾体、玻璃粘接面涂胶以及填缝等工序使用TOTALSEAL聚氨酯胶粘剂是比较适宜的。     

聚氨酯改性氯丁接枝低毒溶剂型鞋用胶粘剂的研制

研究了一种能粘多种材质的溶剂型鞋用大底胶。该胶为一种聚氨酯改性氯丁、SBS接枝胶,粘接范围广,对PU、TPR、SBS等材质粘接性能比氯丁接枝胶好,适合鞋厂流水生产线;所用溶剂毒性相当低,对人无害,有利于劳动保护和环境保护。     

无溶剂型聚氨酯密封胶的研制及性能研究

以甲苯二异氰酸酯、聚醚多元醇、固化剂、复合阻燃剂及无机添加料等为主要原料，研制了双组分无溶剂型聚氨酯(PU)密封胶，并对其性能进行了研究。结果表明，所研制的聚氨酯(PU)胶不仅具有优良的粘接性能，而且还具有良好的抗流淌性、阻燃性及操作性能。     

Bond Strength and Interfacial Ultramorphology of Current Adhesive Systems

This study evaluated the bond strength and ultramorphology of the resin-dentin interfaces produced by current dental adhesive systems. Nine dentin bonding agents were investigated. Restored teeth were vertically, serially sectioned to obtain bonded slices for interfacial TEM analysis or to produce bonded beams for the microtensile bond strength test. The one-step self-etching adhesives (Futurabond® NR and Hybrid Bond®) showed lower bond strength values than the three-step etch-&-rinse adhesive system All-Bond 3. Most bonding agents presented statistically similar mean bond strength values, which ranged from 41.3 ± 17.9 to 35.0 ± 5.3 MPa. The thickness of the hybrid layer varied according to the type of adhesive system used. While the etch and rinse adhesives with alcohol as organic solvent showed bond strength means higher than 40 MPa, the self-etching systems showed bond strength lower than 40 MPa. Resin-dentin interdifusion zone and resin tags were noted in all bonded interfaces.     

Comparative study of zein- and gluten-based wood adhesives containing cellulose nanofibers and crosslinking agent for improved bond strength

Many of the currently used wood adhesives contain chemicals that are harmful to human health and the environment. Increasing environmental and human health concerns have made the development of safe biobased adhesives a priority. In this study, two plant proteins, i.e., zein and wheat gluten, were used to develop wood adhesives and their performance was compared through simple lap shear tests and plywood flexural/internal bond tests in dry and wet conditions. To increase their bond strength, cellulose nanofibers were added to create nanocomposite adhesives and glutaraldehyde was also used to crosslink the proteins. Single-lap shear test was performed to measure the bond strength of different adhesive formulations and determine the optimal formulations and processing conditions. Fractured bond surfaces were studied using optical observation and scanning electron microscopy to determine bond failure mechanisms. Thermal and chemical properties of the adhesives were evaluated using thermogravimetric analysis and Fourier transform infrared spectroscopy, respectively. The bond strength of both zein and gluten adhesives was significantly increased by the addition of the cellulose nanofibers and/or glutaraldehyde, although the two adhesives responded differently to the two reinforcement materials due to the different solvents used to prepare the adhesives. The bond failure mode changed from cohesive failure of the adhesive to structural failure of the adherent for the gluten adhesive containing CNFs and glutaraldehyde. Potential zein and gluten adhesive formulations were used to produce plywood samples and their performance was assessed under different conditions. The formulations with industrial potential were discovered through this study.     

The shear strength of Calabrian pine (Pinus brutia Ten.) bonded with polyurethane and polyvinyl acetate adhesives

In this study, the change in shear strength on radial and tangential surfaces of Calabrian Pine (Pinus brutia Ten.) wood having different roughness values as the result of sawing with a circular ripsaw, planing and sanding, and bonded with polyurethane (PU) and polyvinyl acetate (PVAc) adhesives at the pressure levels of 3, 6, and 9 kgf/cm², was studied. Each of the 360 specimens prepared to determine the effect of the variables on bond performance were subjected to shear test in an universal test machine in accordance with the ASTM D 905–98 standards. The values obtained were analyzed statistically and the results were interpreted. The highest shear strength (11.83 N/mm²) for plane of cut was obtained on the tangential surface after sanding and applying PVAc adhesive with a pressing pressure of 9 kgf/cm². The lowest shear strength (6.01 N/mm²) was obtained in the joinings made on the planed surfaces by using PU adhesive and a pressing pressure of 3 kgf/cm². The highest shear strength (9.10 N/mm²) on the radial surface was obtained after sanding and applying PVAc adhesive and pressing with a pressure of 6 kgf/cm². The lowest shear strength (3.76 N/mm²) was obtained in the specimens whose surfaces were sanded and glued with PU adhesive with a pressing pressure of 3 kgf/cm². In general, in the radial surfaces, just like in the tangential surfaces, the specimens bonded with PVAc exhibited a higher shear strength compared with those glued with PU. According to these results, it is definitely necessary to sand the surfaces prior to the bonding process to have a higher shear strength. The bonding process should be made on the tangential surfaces with higher pressures. The PVAc adhesive should be preferred instead of the PU adhesive. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 99: 3050–3061, 2006     

Effects of typical soybean meal type on the properties of soybean-based adhesive

In order to effectively apply soybean meal for the preparation of water-resistant soybean-based adhesives for plywood, the effects of three typical soybean meal products, namely, low-temperature soybean meal (LM), high-temperature soybean meal (HM), and physical soybean meal (PM), on the properties of soybean-based adhesive were investigated. The results indicated that the number of reactive groups in the three soybean meals followed the order LM > HM > PM, which in turn led to various crosslinking densities when these soybean meals were crosslinked by epichlorohydrin-modified polyamide (EMPA) during the curing process. The LM soybean adhesive had 6.6% higher soaking bond strength and 16.5% higher boiling-dry-boiling bond strength than the HM soybean adhesive, and 19% higher soaking bond strength and 33% higher boiling-dry-boiling bond strength than the PM soybean adhesive, respectively. These three soybean meals could be used to prepare soybean adhesives for interior-use plywood because all plywood panels bonded with their adhesives passed a water-soaking test at 63 °C for 3 h, but only the LM soybean adhesive achieved the desired water resistance for floor-base plywood. Among the three evaluated soybean meals, LM was the most promising raw material for the preparation of soybean-based adhesive because of a greater number of reactive groups, higher crosslinking density, and superior bond strength. Plywood panel bonded with HM soybean adhesive had a water resistance lower than, but very close to, the standard required value (>0.8 MPa) for floor-base plywood.     

聚氨酯胶粘剂的研究进展

综述了聚氨酯胶粘剂的合成、特性和种类。概述了近年来国内外聚氨酯胶粘剂的研究和应用进展,重点介绍了聚氨酯胶粘剂的发展动态和几类主要的聚氨酯胶粘剂,并对其进行了分析,结合实际情况对今后聚氨酯胶粘剂的发展方向作出了展望。     

Effect of using sepiolite silicate + fumed silica mixtures as fillers on the characteristics of solvent-based polyurethane adhesives

Abstract —Both fumed silica and sepiolite have been used as a filler of polyurethane (PU) adhesives. Although effective, the small particle size and the relative high cost of fumed silica are limitations in some applications. Sepiolite is cheaper than fumed silica, but its relatively large particle size facilitates its settling from the adhesive solutions. In this study, the usefulness of using sepiolite + fumed silica mixtures as a filler in solvent-based PU adhesives is demonstrated. The rheological and adhesion properties of the PU adhesive solutions and the rheological and mechanical properties of the PU films (without solvent) were studied. SEM micrographs of PU films showed the morphology and compatibility of the fillers with the PU matrix. The use of sepiolite + fumed silica mixtures inhibited the settlement of the filler from the PU adhesive solutions, increased both the storage and the loss moduli, and improved the rheological and mechanical properties of the PU. On the other hand, the green (immediate) T-peel strengths of roughened styrene-butadiene rubber/PU adhesive joints and plasticized PVC/PU adhesive joints were greatly improved in filled PU adhesives. The effects produced by using fumed silica alone or sepiolite + fumed silica mixtures were very similar, although in general, somewhat more marked in fumed silica-filled PU.