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应用光散射测定高聚物分子量的方法至今已有30多年的历史,这是测定高聚物重均分子量比较好的、测定范围比较宽的方法。虽然,这是一个已被广泛应用的测定方法,但在实验技术上和数据处理方面还存在一些问题。首先是溶液的除尘,通常均用细菌漏斗压漏或离心除尘,不仅费时,而且如果除尘效果不好,在实验过程中不能及时反映出来,直等算完数据之后才能判断。其次是溶液的用量较多,一般达几十毫升。第三是散射角的测定不能太小,通常的商品仪器仅能测
The method of measuring the molecular weight of polymers by light scattering has been more than 30 years old, which is a better way to determine the weight average molecular weight of polymers and has a wider range of measurement. Although this is a widely used method for determination, there are still some problems in terms of experimental techniques and data processing. The first is the solution of the dust, usually with funnel pressure leak or centrifugal dust, not only time-consuming, and if the dust removal effect is not good in the process of experiment can not be reflected in a timely manner until the end of the data can be judged. Followed by the amount of solution is more, generally up to tens of milliliters. The third is the determination of scattering angle can not be too small, the usual commodity instruments can only be measured