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Infrared imaging / Peter Gabriele in ADHESIVES AGE, Vol. 44, N° 6 (06/2001)  

[article]  inADHESIVES AGE > Vol. 44, N° 6 (06/2001) . - p. 20-30 Titre : Infrared imaging : This award-winning paper reports on a complementary tool to AFM for adhesive surface analysis Type de document : texte imprimé Auteurs : Peter Gabriele, Auteur ; Herb Hand, Auteur Année de publication : 2001 Article en page(s) : p. 20-30 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 668.3 Adhésifs et produits semblables Résumé : FT-IR imaging provides spatially resolved spectroscopy with microscopic techniques to generate chemically specific context images of subject materials. Imaging offers detailed characterization of the heterogeneity and spatial organization of complex compositions. We have shown that FT-IR imaging can be useful adjunct to atomic force microscopy and capability of each instrument. This technique provides spatial localization of chemical features and the direct identification and spatial visualization of multi-component spatially separated samples at the microscopic scale. Note de contenu : - BACKGROUND - FT-IR IMAGING - METHODS AND MATERIALS - INSTUMENTATION : Attenuated total reflectance (ATR) - FT-IR imaging - Atomic force microscopy En ligne : https://drive.google.com/file/d/17ILIefUjtJ_UxuWAocqTi7LkcFYWgP_Q/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19839 [article]

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Building block / Misty Huang in ADHESIVES AGE, Vol. 44, N° 6 (06/2001)  

[article]  inADHESIVES AGE > Vol. 44, N° 6 (06/2001) . - p. 31-34 Titre : Building block : SPUR technology used to create a low-modulus sealant for construction applications Type de document : texte imprimé Auteurs : Misty Huang, Auteur ; Jeries Nesheiwat, Auteur ; Nick Stasiak, Auteur Année de publication : 2001 Article en page(s) : p. 31-34 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 668.3 Adhésifs et produits semblables Résumé : The properties of SPUR prepolymers can be tailor made by changing the polyols, the ratios of NCO/OH, and the silane endcappers. Using A-link 15 silane, low modulus and low viscosity prepolymers can be made at the NCO/OH ration of 1.3 to 1.5. Consequently, the sealants made from the SPUR prepolymers and a series of new aminosilanes ad adhesion promoters can achieve superior flexibility, excellent adhesion and low modulus that is particularly suitable for construction applications. Moreover, for cost reduction purposes, these SPUR prepolymers were designed for high filled sealant formulation. Note de contenu : - Experimental - Sealant preparation - Property testing - Results and discussion - Silanes used as adhesion promoters - Formulation of low modulus sealants with different silane adhesion promoters En ligne : https://drive.google.com/file/d/1whxqwY3tN0dGCZgg3ifklxtLmNinjVRI/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19840 [article]

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History lesson / Donald L. Hunston in ADHESIVES AGE, Vol. 44, N° 6 (06/2001)  

[article]  inADHESIVES AGE > Vol. 44, N° 6 (06/2001) . - p. 35-42 Titre : History lesson : Analyzing load history dependence of fracture in stuctural adhesives Type de document : texte imprimé Auteurs : Donald L. Hunston, Auteur Année de publication : 2001 Article en page(s) : p. 35-42 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésifs -- Propriétés mécaniques Adhésifs structuraux Caoutchouc Epoxydes Essais dynamiques Matières premières Rupture (mécanique) Viscoélasticité Index. décimale : 668.3 Adhésifs et produits semblables Résumé : Fracture tests were conducted on bulk samples of a rubber-toughened epoxy that models the fracture behavior of commercial structural adhesives. The samples were loaded with a variety of loading histories. The histories were selected to examine the dependency of fracture energy on loading rate, loading level, time under load, and recovery after loading. The results suggest that unless the load levels are a substantial fraction of the failure load, the loading history has little effect, at least for the time scales studied here. When the loads are high, however, the time under load becomes important and produces significant increases in toughness. If the sample is unloaded and allowed to recover, some but all of the additional toughness is lost. These results are consistent with a viscoelastic toughening mechanism and can be qualitatively explained with sample crack-tip blunting model. En ligne : https://drive.google.com/file/d/196oF1YWq8kEV4yFo03fXvg4-C4tzsswc/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19847 [article]

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Welcome Addition / Anthony D. Pajerski in ADHESIVES AGE, Vol. 44, N° 6 (06/2001)  

[article]  inADHESIVES AGE > Vol. 44, N° 6 (06/2001) . - p. 43-49 Titre : Welcome Addition : The effectiveness of polyaziridene used in high-perfomance waterborne urethane adhesives Type de document : texte imprimé Auteurs : Anthony D. Pajerski, Auteur Année de publication : 2001 Article en page(s) : p. 43-49 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésifs en phase aqueuse Adhésion Analyse mécanique dynamique Chlorure de polyvinyle Durée de vie en pot Matières plastiques -- Collage Matières premières Polyéthylèneimine Polyuréthanes Résistance à l'humidité Résistance au fluage Réticulation (polymérisation) Index. décimale : 668.3 Adhésifs et produits semblables Résumé : Some useful benefits of formulating higher performing urethane adhesives by addition of polyaziridine have been demonstrated. The data presented shows polyaziridines can be a cost-effective crosslinker for improving the adhesive performance of water urethanes. As little as 0.08 eqs. or 0.5 percent versus solids were found to have a significant if not optimal effect on resistance properties. Another advantage of polyaziridine-based formulations is the extended pot life one can apparently obtain that can provide further application flexibility. The addition of polyaziridines has also been demon-strated to provide improved adhesion on certain substrates, particularly SMA. Of course, when one is formulating adhesives for a particular application, optimal combinations of cross-linker, polymer and other addi¬tives will need to be determined as they may be expected to be interdependent. As previously mentioned, further investi-gations are underway to elucidate whether unexpected low levels of polyaziridine addi tion to waterborne urethanes are typically/universally required for optimal performance in adhesive applications. The actual expected limit to the pot life will be determined and factors that might influence it. Note de contenu : - EXPERIMENTAL : Polyaziridene crosslinking adhesive formulations - DMA - Cotton to cotton bonding - Dry bonding - PVC to plastic bonding - Hot creep resistance - Water resistance - Pot life - Raw materials and substrates - RESULTS AND DISCUSSION : Determination of optimal aziridine equivalents - EFFECT OF BONDING METHOD : Effect of pH - Effect of neutralizing agent - Adhesion - Pot life En ligne : https://drive.google.com/file/d/1yi2hxGeSXdrqXtz3xC4UMYaoK9Pwx4Yc/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19939 [article]

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