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首页> 外文期刊>Environmental toxicology and chemistry >Determination Of Physicochemical Properties Of Tetrabromobisphenol A
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Determination Of Physicochemical Properties Of Tetrabromobisphenol A

机译：四溴双酚A的理化性质的测定

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摘要

Aqueous solubility (S_w), 1-octanol/water partition coefficient (K_(OW)), and vapor pressure of the nonionic form of 2,2',6,6'-tetrabromo-4,4'-isopropylidenediphenol (tetrabromobisphenoi A or TBBP-A) were measured. From this, enthalpies of solution and vaporization were estimated. Furthermore, enthalpy of fusion and melting point were measured to estimate subcooled liquid vapor pressure, the infinite dilution activity coefficient, and Henry's law constant. Since TBBP-A is expected to exit in both ionic and nonionic forms at near neutral pH, pH effects on physicochemical properties were also examined. Because of the ionization of TBBP-A, S_w increased by five orders of magnitude, while K_(OW) decreased by eight orders of magnitude. Furthermore, an analytical model based on mass balance and dissociation of TBBP-A was applied to represent the pH dependence.
机译：水溶性（S_w），1-辛醇/水分配系数（K_（OW））和2,2'，6,6'-四溴-4,4'-异丙基二烯二酚（四溴双酚A或测量TBBP-A）。由此估计溶液和蒸发的焓。此外，通过测量熔化焓和熔点来估计过冷液体蒸气压，无限稀释活度系数和亨利定律常数。由于TBBP-A有望在接近中性pH时以离子和非离子形式存在，因此还检查了pH对理化性质的影响。由于TBBP-A的电离，S_w增加了五个数量级，而K_（OW）减少了八个数量级。此外，基于质量平衡和TBBP-A离解的分析模型被用来代表pH依赖性。

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