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We investigate the formation of quark and diquark condensates in two different situations. First, we study the phenomenon of chiral and color symmetry breaking and their restoration for a uniformly accelerated observer due to the thermalization Hawking-Unruh effect. The gap equations for quark and diquark condensates with finite chemical potential are constructed. The critical value of acceleration is also obtained. Second, we consider the phase transitions in dense matter with quark and diquark condensates in the static Einstein universe at finite temperature and chemical potential. The nonperturbative expression for the thermodynamic potential is obtained. The phase portraits of the system are constructed.

SynopsisPolarization-reversal currents and x-ray profiles under a high dc field were measured on polytrifluoroethylene (PTrFE) samples prepared by melt crystallization at different cooling rates. The results for PTrFE were found to be analogous to those for copolymers of vinylidene fluoride and trifluoroethylene [p(VDF/TrFE)] with low VDF content. Slowcooled and quenched samples showed different x-ray profdes but the same IR spectra. For the slowcooled samples, a polarization reversal was clearly obse~ed as a peak in polarization current, offering evidence for ferroelectric order in F'TrFE. The ferroelectric behavior was found to be unlike that of typical ferroelectric polymers. There are two processes in a polarization reversal, i.e., partial depolarization and polarization reversal, accompanied by crystalline phase transitions.It is noted that no ferroelectric order was observed for the quenched sample which, however, becomes pyroelectric by poling as revealed by our previous studies. We speculate on possible crystal structures of PTrFE based on the published structure models and the present results. The relation between the ferroelectricity and the previously reported pyroelectricity is also discussed.'Present address:

Miscibility was studied for four polyamide blends of 6I/6T [copolymer consisting of 1,6-hexamethylene diamine and isophthalic acid (6I) (70 wt %) and terephthalic acid (6T) (30 wt %)] with MXD6 (polyamide of m-xylenediamine and adipic acid), BAC6 (polyamide of 1,3-bis(aminomethyl)cyclohexane and adipic acid), TR55 (copolymer consisting of nylon 11 (30 wt %), and polyamide of bis(3-methyl, 4-aminocyclohexyl)methane (30 wt %) and isophthalic acid (70 wt %), and CX7323 (polyamide of bis(4-aminocyclohexyl)methane and dodecanedicarboxylic acid), using differential scanning calorimetry, X-ray diffraction method, and electronmicroscopic observation. In quenched MXD6/(6I/ 6T) and BAC6/(6I/6T) blends, MXD6 and BAC6 components were miscible to 6I/6T, but TR55 and CX7323 components were completely phase-separated from 6I/6T. Interestingly on electronmicroscopic observations, TR55 and CX7323 components were seen as droplets in 6I/6T medium when the content is low, but when 50 wt %, a layered structure was constructed with 6I/6T, reminiscent of morphological structure in block copolymer.

The relationship between electric displacement D and electric field E was studied for alicyclic polyamides of 1,3-bis(aminomethyl)cyclohexane and adipic, pimelic and sebacic acids, an aromatic polyamide prepared from hexamethylenediamine (HMD) and isophthalic acid and a copolyamide of HMD with isophthalic and terephthalic acids. Quenched samples of these polyamides were poorly crystalline or amorphous and exhibited a D-E hysteresis loop with the remanent polarization of 26 to 38 mC·m-2. The remanent polarizations disappeared at the glass transition temperature of each sample. The origin of the D-E hysteresis loop is attributable to amide groups in amorphous regions.