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首页> 外文期刊>Journal of Applied Polymer Science >Flow-injection polymer analysis of ethylene propylene diene monomer elastomers. I
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Flow-injection polymer analysis of ethylene propylene diene monomer elastomers. I

机译：乙烯丙烯二烯单体弹性体的流动注射聚合物分析。一世

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摘要

A rapid, flow-injection polymer analysis (FIPA) method for the solution characterization of EPDM elastomers, with a wide range of ethylene comonomer content, was developed. Solutions of the polymer were introduced into a flowing mobile phase which was monitored by an array of three detectors: a right-angle laser light-scattering unit, a differential refractive index detector, and a differential pressure viscometer. To adequately characterize a wide range of comonomer composition, it was found that a nominal temperature of 90 degreesC and a solvent (e.g., 1,2,4-trichlorobenzene) capable of high-temperature sample dissolution was needed for the analysis. Polymer association or aggregation was observed in cyclohexane at lower analysis temperatures. With an analysis time of a few minutes, information on molecular weight, molecular size, and comonomer composition can be obtained directly. Information regarding polydispersity and properties such as melt viscosity may be obtained indirectly or through correlation to other, independent property measurements. The data were also compared to a high-temperature GPC analysis method already in use. The combination of rapid analysis time and measurement of fundamental molecular properties suggests the usefulness of the instrumentation and method to plant process control. (C) 2002 Wiley Periodicals, Inc. [References: 24]
机译：开发了一种快速的流动注射聚合物分析（FIPA）方法，以表征具有广泛的乙烯共聚单体含量的EPDM弹性体。将聚合物溶液引入到流动的流动相中，该流动相由三个检测器组成的阵列进行监测：三个检测器：直角激光散射单元，示差折光率检测器和示差压力粘度计。为了充分表征大范围的共聚单体组成，发现分析需要标称温度为90℃和能够高温溶解样品的溶剂（例如1,2,4-三氯苯）。在较低的分析温度下，在环己烷中观察到聚合物缔合或聚集。通过几分钟的分析时间，可以直接获得有关分子量，分子大小和共聚单体组成的信息。有关多分散性和性能（例如熔体粘度）的信息可以间接获得，也可以通过与其他独立的性能测量结果相关来获得。还将数据与已经使用的高温GPC分析方法进行了比较。快速分析时间和基本分子性质的测量相结合，表明了仪器和方法对工厂过程控制的有用性。 （C）2002 Wiley Periodicals，Inc. [参考：24]

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