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反相色谱法已广泛应用于线型聚合物物理性质的研究,通常是将聚合物涂敷在色谱担体上作固定相来进行的。我们初步探索了以聚合物本体作固定相的色谱行为,并与传统的方法作了比较。实验结果表明,对于玻璃化转变和结晶-熔融过程、结晶度的测量等,两种方法所得的结果大体一致;对于相互作用参数等的测定,两种方法所得结果有较大的差异。我们对造成这种差异的原因作了初步解释,并且研究了本体固定相的颗粒大小对比保留值的影响。
Reversed-phase chromatography has been widely used in the study of the physical properties of linear polymers, usually by coating the chromatographic support with the polymer as the stationary phase. We initially explored the chromatographic behavior of the polymer as the stationary phase and compared it with the traditional method. The experimental results show that the results obtained by the two methods are almost the same for the glass transition, the crystallization-melting process and the measurement of the crystallinity. The results obtained by the two methods are quite different for the determination of the interaction parameters and the like. We have made a preliminary explanation for the reasons for this discrepancy and investigated the effect of particle size on the retention of bulk stationary phase.