Morphological nature

It is well known that the properties of an interface are governed largely by the chemical/morphological nature and physical/thermodynamic compatibility between the two constituents and most often limit the overall performance of the bulk... 

The treated phenomena and investigations summarized above are at the centre of the topic of this special two-volume edition of the Advances in Polymer Science on Intrinsic molecular mobility and toughness of polymers . However, little has been said about the mutual relations between molecular configuration, polymer morphology, nature, intensity and cooperativity of sub-Tg relaxation mechanisms, and mode of solicitation on the one hand and their effect on disentanglement, craze formation, yield behaviour and ultimate strength on the other. These subjects will be critically evaluated in the subsequent presentations of this Volume. 

Various process steps were used to determine their Influence on the morphological nature of liquid crystalline copolyester films. Compression molding was used to form quiescent films, while extenslonal deformation above and below the onset of fluidity, as well as shear deformation above the onset of fluidity was used to make non-quies-cent films. It Is a basic result that molecular orientation can only be achieved when the deformation is done while the polymer is In a liquid crystalline melt state. Experimental details are given In the subsection Materials and Processing, while an interpretation is offered in the discussion in the subsection Morphological and Process Consideration. ... 

Dubost, B., Lang, J-M., Tanaka, M., Saintfort, P., and Audier, M. Large Al-CuLi single quasicrystals with triacontahedral solidification morphology. Nature (London) 324, 48-50 (1986). 

Providing a comprehensive characterization of pharmaceutical dosage forms requires a multi-instrumental approach as no single surface analytical technique can ascertain both the chemical and morphological nature of the surfaces. To this end, SPM, XPS, and ToF-SIMS have been used as complementary techniques with which to characterize the surface nature of dosage forms (141,143-145). 

The dynamic mechanical behavior of block copolymers depends on the mechanical and morphological nature of each block. If polymer block A is thermodynamically incompatible with polymer block B, microphase domains form (J-5). The concentration and chemical structure of these domains can be controlled to produce desired mechanical and thermal properties. 

The effect of orientation on permeability is dependent on the morphological nature of the barrier resin. Semicrystalline polymers, VDC copolymer, and aromatic nylon MXD-6... 

The effect of orientation on oxygen permeability of the medium and high barrier resins is seen to be dependent upon the morphological nature of the barrier resin prior to orientation. A plot of the oxygen transmission rates as a function of the overall draw ratio (figure 3) illustrates this clearly. While the semicrystalline polymers, VDC copolymer, and aromatic nylon MXD-6, show little change in the permeability with moderate amounts of orientation in the solid state, orientation of the amorphous polymers SELAR PA 3426 and XHTA-50A causes reduction in the permeability by 5-30% in both resins, depending upon the overall level of orientation. 

Figure 3. Oxygen transmission rates as a function of the overall draw ratio, illustrating the dependence on the morphological nature of the barrier resin prior to orientation.

In addition, variation in the chemical, physical, or morphological nature of the fiber along its length will affect the results of interfacial shear strength measurements, which only consider very small secticms. 

Fourier transform infrared spectroscopy (FTIR) was recorded using Thermo Scientific Nicolet iSlO FTIR Spectrophotometer. Scanning electron microscopy (SEM) imaging was carried out using Gemini FE-SEM from Zeiss to study the morphological nature of the film. 

In the boundary lubrication regime, the antiwear and Mction-reduction processes are associated to the build-up of a tribologic film resulting from the chemical reaction between oil additives and sliding surfaces in contact [1-3]. The case of zinc dialkyl dithiophosphate (ZDDP) additive has been extensively studied by analytical transmission electron microscopy (ATEM) and the morphology, nature, structure and tribologic properties of the tribochemical film were obtained [4-6], The Figures 4.1 and 4.2 summarize the main results. 

There has been considerable debate in the literature regarding the exact role of the insulator-semiconductor interface on the performance of the device. We will here restrict our discussion to devices where the semiconductor is deposited on top of the gate dielectric (bottom gate architecture). Basically, the physical features that intervene may be of electrical or morphological nature. These two aspects will now be dealt with in sequence. 

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