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首页> 外文期刊>Journal of Applied Polymer Science >Estimation of dilute solution viscosity parameters of rubber seed oil alkyds
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Estimation of dilute solution viscosity parameters of rubber seed oil alkyds

机译：橡胶籽油醇酸树脂稀溶液粘度参数的估算

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Viscosity measurements were carried out in methyl ethyl ketone (MEK) and dimethyl formamide (DMF) for rubber seed oil alkyds having oil content of 20 (I), 30 (II), 35 (III), 40 (IV), 50 (V), and 60% (VI). Viscosity molecular weights, intrinsic viscosities, and viscosity parameters K and alpha, characteristic for both polymers and solvents, were determined. Generally, solubility properties were found to depend on molecular weight and polarity of the alkyds and solvent. Intrinsic viscosities of the alkyds were larger in DMF than in MEK, suggesting DMF to be a better solvent than MEK for rubber seed oil alkyds. Molecular weights determined for the alkyds range from 441 for sample III to 1323 for sample V. The viscosity molecular weights are in reasonable agreement with the values determined for samples II-V in MEK and samples I-IV in DMF. The values of Huggin's constant for these alkyds were also determined. Data reported also suggest that rubber seed oil alkyds tend to tolerate relatively basic solvent, such as DMF. Fractionation of the alkyds was considered to be in respect of molecular weight and polarity of the alkyds, and results show that low-molecular-weight species constitute greater proportion of the alkyds. (C) 1998 John Wiley & Sons, Inc. [References: 16]
机译：在甲乙酮（MEK）和二甲基甲酰胺（DMF）中对油含量为20（I），30（II），35（III），40（IV），50（V）的橡胶籽油醇酸树脂进行粘度测量）和60％（VI）。确定了聚合物和溶剂的特性的粘度分子量，特性粘度以及粘度参数K和α。通常，发现溶解度性质取决于醇酸树脂和溶剂的分子量和极性。在DMF中，醇酸树脂的本征粘度大于在MEK中，这表明对于橡胶籽油醇酸树脂，DMF是比MEK更好的溶剂。测得的醇酸分子量范围为样品III的441至样品V的1323。粘度分子量与在MEK中的样品II-V和在DMF中的样品I-IV所确定的值合理地吻合。还确定了这些醇酸树脂的霍金常数值。报道的数据还表明，橡胶籽油醇酸树脂倾向于耐受相对碱性的溶剂，例如DMF。醇酸的级分被认为是相对于醇酸的分子量和极性而言，并且结果表明，低分子量种类占醇酸的比例更大。 （C）1998 John Wiley＆Sons，Inc. [参考：16]

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