Elastic Bonding and Sealing in Industry

Burchardt, Bernd; Merz, P.

doi:10.1016/s1874-5695(06)80017-5

Cited by 7 publications

(6 citation statements)

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“…Dalam pelaksanaannya, adhesive bonding memerlukan waktu curing yang lama, sehingga pengerjaan menjadi tidak efisien dan efektif, selain itu, zat adhesive pada adhesive bonding tidak tahan suhu tinggi, sehingga joining dengan metode ini akan membatasi pada penggunannya. [4][5][6] Pada umumnya jika penyambungan menggunakan mechanical joining terdapat dua masalah utama. Yaitu waktu yang diperlukan untuk membuat lubang pada sheet dan terdapat adanya konsentrasi tegangan pada sambungan yang mana mempengaruhi property mekanikal dari struktur.…”

Section: Pendahuluanunclassified

Pengaruh Clamping Frame Kayu Meranti dan ASTM A36 pada Friction Spot Joining AL 1100 dan PVC

Raharjo

Hamidi

Widodo

et al. 2020

JRM

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In this paper, the effect of welding parameters on the shear strength of Al-PVC hybrid structures was discussed. This Research developed welding parameters in the form of Plunge Depth, heating time, and clamping frame materials. By these different parameters would result in different shear strength of welded materials. Following optimization of the process, a detailed comparison of the properties and microstructures of two different materials (meranti wood and ASTM A36 Steel) would affect to different values of thermal conductivity. The Aluminum used was Al 1100, which was welded by using a friction stir spot welding method with Polyvinyl Chloride (PVC). In this study, by the different heating times, the shear test was carried out with the ASTM D3163 standard. In this study, it was found that the maximum temperature of Aluminum occurs during the 2 nd second of the welding process and then decreased in the 5 th second until 60 th second. However, the optimum shear strength found at 20 th second. Following heat transfer and degradation materials, the 2mm plunge depth has a higher temperature and higher shear strength than 1,5mm plunge depth. Differences in the response of the two depth were attributed to the difference in mechanical interlocking. This study found that the ASTM A36 clamping frame maximum shear load of 182.4 N is higher than meranti wood frame of 125.5 N. Differences in these value are attributed to the differences of the thermal conductivity, which meranti wood had a lower thermal conductivity than ASTM A36. These have findings significant implications for the commercial application of welding hybrid structures. The best way to take advantage of the benefit of AL-PVC Structure Hybrid for friction stir spot welding would appear to be 20 second heating time, 2mm plunge depth with ASTM clamping frame.

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Section: Pendahuluanunclassified

Pengaruh Clamping Frame Kayu Meranti dan ASTM A36 pada Friction Spot Joining AL 1100 dan PVC

Raharjo

Hamidi

Widodo

et al. 2020

JRM

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“…Reactive adhesives comprise reactive liquid monomers or oligomers, e.g., acrylic, methacrylic, cyanoacrylic, epoxide, or isocyanate adhesives, and solvent-based adhesives, e.g., aminoplastics or phenolics, using water or organic solvents for reducing the viscosity and reactivity . While acrylic and methacrylic adhesives need an initiator and cannot establish covalent bonds with the adherend, the rest of the mentioned adhesives do so if nucleophilic groups, such as OH and NH 2 , are present in the adherend …”

Section: Introductionmentioning

confidence: 99%

Polyurea Networks from Moisture-Cure, Reaction-Setting, Aliphatic Polyisocyanates with Tunable Mechanical and Thermal Properties

Sánchez‐Ferrer

Soprunyuk

Engelhardt

et al. 2021

ACS Appl. Polym. Mater.

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A series of one-component aliphatic polyisocyanates has been synthesized and analyzed before and after the moisture-curing process. The resulting reactive polymers are monodisperse tetrafunctionalized reactive molecules that become aliphatic polyurea networks with enhanced tunability of mechanical, chemical, and thermal properties compared to polyurethane and polyamide counterparts. This tunability responds to the insertion of a soft polypropylene oxide polymer segment between two triisocyanate molecules, as demonstrated by two-dimensional diffusion ordered spectroscopy (2D DOSY) 1H NMR experiments and confirmed by Fourier transform infrared (FT-IR) spectroscopy. After curing, the polyurea networks show two glass transition temperatures: a characteristic of microphase-segregated block copolymers and a transient network due to the presence of the hydrogen bonds between the urea motives, as concluded from the evaluation of dynamic mechanical analysis (DMA), wide-angle X-ray scattering (WAXS), small-angle X-ray scattering (SAXS), and differential scanning calorimetry (DSC) experiments. Therefore, controlling the volume fraction, i.e., the degree of polymerization of the polypropylene oxide soft domains, the cured materials exhibit viscoplastic or viscoelastic properties, making these polyurea networks very attractive as adhesives or sealants.

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“…They often offer more convenient, more durable and faster solution. They provide solution with a more even distribution of stresses in the joint [1][2][3], [4], which consequently increases the toughness of the structure and the transfer of large loads. At the same time, they enable a reduction in the weight of the whole structure, which is often associated with a significant reduction in expenses.…”

Section: Introductionmentioning

confidence: 99%

Ageing of Adhesive Joints for Façade Applications – Comparison of Artificial and Real Weathering Conditions

2019

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Currently, the adhesive joints are more and more regularly used as an alternative to mechanical joints. They often offer a more suitable, durable and faster possibility. They provide a solution with a more even distribution of stresses in the joint, which consequently allows an increase in the rigidity of the structure and allows it to withstand even heavy loads. High - strength flexible adhesive systems enable the implementation of effective structural joints, and although several decades have passed since the certification and installation of the first façade system with bonded anchoring, even today it is not a matter that is properly grounded in technical standards. A list of specific test procedures on whose basis the behaviour of the joint over the next 40 years could be predicted does not exist. On the basis of these facts, the authors have decided to subject the test samples both to laboratory measurements, where two methods were selected, as well as to expose them to the effects of real weather conditions for a 3-year period. Comparison of the real environment influence results and the methods of artificial aging showed that the selected conditioning methods adequately simulate the effects of weather conditions.

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Elastic Bonding and Sealing in Industry

Cited by 7 publications

References 0 publications

Pengaruh Clamping Frame Kayu Meranti dan ASTM A36 pada Friction Spot Joining AL 1100 dan PVC

Pengaruh Clamping Frame Kayu Meranti dan ASTM A36 pada Friction Spot Joining AL 1100 dan PVC

Polyurea Networks from Moisture-Cure, Reaction-Setting, Aliphatic Polyisocyanates with Tunable Mechanical and Thermal Properties

Ageing of Adhesive Joints for Façade Applications – Comparison of Artificial and Real Weathering Conditions

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