首页> 外文期刊>Journal of Applied Polymer Science >Characterization of Methocel (TM): Correlation of static light-scattering data to GPC molar mass data based on pullulan standards
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Characterization of Methocel (TM): Correlation of static light-scattering data to GPC molar mass data based on pullulan standards

机译:Methocel(TM)的特性:基于支链淀粉标准的静态光散射数据与GPC摩尔质量数据的相关性

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Using low-angle laser light-scattering (LALLS) and multiangle laser lightscattering (MALLS) techniques, absolute molar mass averages were determined for a wide variety of polymers in the Methocel(TM) product line produced by The Dow Chemical Company. These data were correlated to GPC molar mass averages obtained from column calibration using pullulan standards. It was determined that the pullulan equivalent molar mass averages overestimated the values determined by light scattering by a factor as high as 3.2. Mark-Houwink parameters were calculated based upon values for the pullulan standards and application of the universal calibration concept. Sample preparation issues and chromatographic conditions that impact data quality are also presented. (C) 1998 John Wiley & Sons, Inc. [References: 52]
机译:使用低角度激光散射(LALLS)和多角度激光散射(MALLS)技术,在由陶氏化学公司生产的MethocelTM产品系列中,测定了各种聚合物的绝对摩尔质量平均值。这些数据与使用支链淀粉标准品通过色谱柱校准获得的GPC摩尔质量平均值相关。经确定,支链淀粉当量摩尔质量平均值高估了由光散射确定的值,其系数高达3.2。 Mark-Houwink参数是根据普鲁兰标准的值和通用校准概念的应用计算得出的。还介绍了影响数据质量的样品制备问题和色谱条件。 (C)1998 John Wiley&Sons,Inc. [参考:52]

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