Polarizing micrographs

Figure 20.3 Polarized micrographs of the PHB/PEN/PET blends for various compositions (mol %)...

Morphology of oligomers. PHBA-containing oligomers were studied by DSC and by polarizing microscopy with the results indicated in Table 2. The polarizing micrograph of the 40/60 PHBA/diol ratio LC polyol (Fig. 5) is typical. 

Polarizing micrographs at 25° showed microscopic birefringent domains in the enamel films. A typical one made from the 40/60 PHBA/diol ratio polyol is shown in Fig. 6. Such domains were not visible in cured films made from the PA/AA/NPG polyol or from the MHBA-modified enamels. 

Fig. 5 The polarizing micrograph of the 40/60 PHBA/diol ratio LC polyol.

Figure 1.62 Cross-polarized micrograph of polyethylene showing spherulitic structure. From K. M. Ralls, T. H. Courtney, and J. Wulff, Introduction to Materials Science and Engineering. Copyright 1976 by John Wiley Sons, Inc. This material is used by permission of John Wiley Sons, Inc.

Fig. 6. Change of the pattern of the polarizing micrograph of liquid crystalline PBLG (DP 470) in CH2Br2 (14.0 vol%) when the direction of the external field (394 V/cm) is reversed. From left to right 0, 2, 10, 30, 47, and 140 sec. The direction of the external field horizontal. Solution thickness, 0.10 mm...

Figure 14. Cooling profile analysis of polarized micrographs of 100% AMF collected during the static crystallization process at the cooling rates of 0.1°C/min, 1°C/min, and 5°C/min depecting the microscopic properties (A) Df and (B) Df, monitored against changing temperature.

Figure 10.10. Polarization micrographs of PP/talc showing the nucleating effect of talc taken at different times of crystallization, (a) 0.5 min, (b) 7.5, (c) 31, and (d) 38. The left half of photograph is without filler and the right half of the photograph is with 0.5% talc. [Adapted, by permission, from Pukanszky B, Belina K, Rockenbauer A, Maurer F H J, Composites, 25, No.3, 1994, 205-14.]...

Fig. 15. The polarizing micrograph (left) and the electron micrograph (right) of electrically oriented films of poly(-y-benzylglutamate)s. Left PBLG cast and dried from a CH2Br2 solution (84 V/cm). Right an equimolar mixture of PBLG and PBDG cast and dried from a CHCI3 solution (180 V/cm), O replica...

The cross polarized micrographs of the pyrolyzed residues of the Cat. Inc. original coal liquid and Cat. Inc. asphaltene are shown in Figure 2. The microstructures are primarily coarse mosaic textures. The following subsections describe the different additives of elemental and organic sulfur, organometallics and their combined effects on Cat. Inc. asphaltene during pyrolysis. 

Optical polarized micrographs of PDS isothermaUy crystallized at 75°C for 12 min under the given shear conditions. 

Figure 10.24. Polarized micrographs of the E44/R811/azo-1 (80 8.4 11.6 wt%) mixture in 5- xm glass cell without any alignment treatment upon UV and Vis light irradiation.

Figure 10. Polarizing micrograph of a dewetted sample of 185 on a glass substrate. Overview of the pattern (left). Polycrystalline dome prepared by annealing at room temperature (top right) and single crystalline domes prepared by annealing at 50 C (bottom right).

It is found that (R)-Poly-l forms whiskers when slowly cooled from the isotropic phase, as depicted in Fig. 11.3. The observed whiskers of (R)-Poly-l are 5-7 pm in diameter and approximately 100-200 pm in length. The size of the whisker depends not only on the polymer structure including the side chains but also on the cooling rate from the isotropic phase. A large area of the POM micrograph is dark, but the circularly polarized micrograph indicates that the dark area contains many whiskers (Fig. 11.3b). 

FIGURE 6 Polarized micrograph of as-prepared sample of neat PEO captured at 30 °C. Magnification—5x. The bar corresponds to 200 pm. 

Cross-polarizing micrograph, 9-8 Crystal structure for polypyrrole, 15-9, 15-53-15-55, 15-57, 15-65... 

At the same time, the effect of the miscibility of the polymer with the compatibilizer was also examined by utilizing similar PP-g-MA s with different number of polar groups. PP- -MA-lOOl (acid value 26 mg KOH/g) and PP-g-MA-1010 (acid value 52 mg KOH/g) were mixed with PP in a 77 23 ratio of PPJ P- -MA [45]. Figure 13.3 shows optical polarized micrographs of these blends at their melt state (200°C) from which one can see that the... 

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