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首页> 外文期刊>Journal of Applied Polymer Science >Ultrasonic and viscometric investigations of a poly(vinyl alcohol)-dextran mixture in aqueous solution
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Ultrasonic and viscometric investigations of a poly(vinyl alcohol)-dextran mixture in aqueous solution

机译：水溶液中聚乙烯醇-葡聚糖混合物的超声和粘度测定

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Ultrasonic spectroscopy provided a powerful, efficient, and reliable tool for a number of investigations, including those of polymer solution dynamics, molecular interaction, and the miscibility and compatibility of biopolymers in aqueous solutions. Ultrasonic velocity and related acoustic parameters were measured as a function of the concentration of poly(vinyl alcohol) (PVA), dextran, and a PVA-dextran mixture in water with the resonance method at a frequency of 3 MHz over a temperature range of 20-50degreesC. From the comparative results of sound velocity, density, adiabatic compressibility, acoustic impedance, and viscosity relaxation time as a function of temperature and concentration, the mode of interaction and the compatibility and miscibility between the two biologically active macromolecules were probed and were considerable at all concentrations and temperatures because of crosslinking via hydrogen bonding involving the hydroxyl groups of both of the biomacromolecules. The interpretations of the acoustic results were confirmed by the intrinsic viscosities of the ternary systems. The significant interaction and compatibility of these biopolymers should lead to the development of pharmaceutically active molecules. (C) 2003 Wiley Periodicals, Inc. [References: 24]
机译：超声波光谱为许多研究提供了强大，有效和可靠的工具，包括聚合物溶液动力学，分子相互作用以及生物聚合物在水溶液中的混溶性和相容性。使用共振法在20 MHz的温度范围内以3 MHz的频率测量超声速度和相关声学参数随水中聚乙烯醇（PVA），右旋糖酐和PVA-右旋糖酐混合物的浓度的变化-50摄氏度从声速，密度，绝热可压缩性，声阻抗和粘度弛豫时间随温度和浓度变化的比较结果中，探究了两种生物活性大分子之间的相互作用方式以及相容性和可溶混性由于通过氢键交联而涉及两个生物大分子的羟基，因此浓度和温度较高。声学结果的解释被三元系统的固有粘度所证实。这些生物聚合物的显着相互作用和相容性应导致药物活性分子的发展。 （C）2003 Wiley Periodicals，Inc. [参考：24]

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