Adhesives, analysis

SEC-FUR is widely used for adhesive analysis [704,706]. Evaporative SEC-FUR has been used for the study of adhesives composed of a high-MW acrylic fraction, a medium-MW PVAc fraction, SBR in the low-MW fraction and a trace amount of dilaurylthiodipropi-onate (DLTDP) in the very low-MW region [706]. The suitability of a moving ZnSe window for SEC-FUR was demonstrated by analysing oligomers in a PS standard mixture [503]. 

Adhesion Analysis in Swollen Elastomer Blended Networks... 

Figure 2. Filler adhesion analysis. Function /l — ( = volume fraction of filler).

In the filler-polymer adhesion analysis, the filler particles do not imbibe solvent during the swelling process, so the problem in attempting... 

Table III. Calculations for Interfacial Adhesion Analysis Shown in Figure 4...

Figure 5. Adhesion analysis of blends swollen in differential solvents...

Figure 7. Adhesion analysis after swelling in styrene...

Figure 10. Adhesion analysis after differential solvent swelling at —25°C...

ADHESION ANALYSIS AFTER DIFFERENTIAL SOLVENT SWELLING... 

Adhesion analysis from this differential swelling is shown in Figure 14 wherein the descending pattern of the plots of 30 or 60-minute cure time indicates the presence of interfacial bonds. 

Zhijiang et al. reported an improvement in the mechanical properties of a PHB nanocomposite made of bacterial cellulose nanofibrils that was prepared by the solution casting method. In addition, they found that the nanocomposite showed better biocompatibility and mechanical properties than pure PHB based on cell-adhesion analysis using Chinese hamster lung (CHL) fibroblast cells and stress strain tests, respectively. In comparison to pure PHB, the nanocomposite of PHB/bacterial cellulose was observed to exhibit about a 202% increase in tensile stress and a 2.2-fold increase in elongation to break, respectively (Figure 5.3). ... 

If we assume that the development of a standard state, i.e. ideal metal-vacuum interface, was in fact the key to the advancements in metallic contact analysis we should also expect that this will also be the case in the polymer, or solid organic, friction or adhesion analysis. The consequence is that polymer surface characterization under various environments becomes the most important issue at hand. The achievement of the standard surface state in polymer or solid organic system will be most difficult due to the relatively weak intermolecular bonding forces and the normal existance of a wide range of impurities within the material itself. Ambient vacuum conditions are required for most of the physics oriented surface characterization techniques, e.g. LEED, FIM, Auger electron spectroscopy and under these conditions the surface can be modified by... 

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