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高聚物的分子量是高分子材料最基本的参数之一,在科学研究和生产实践中,为了控制产品性能,经常需要测定这一参数。自三十年代不饱和聚酯问世以来,国内外都采用端基法(酸值法)来测定分子量,该方法虽简单易行,但是干搅因素较多,误差范围较大,达20%以上。自从Mark-Houwink 建立了高聚物溶液的特性粘度[η]和高聚物分子量M 之间的经验关系式[η]=KM~α以来,用粘度法测定分子量以控制高聚物的质量是行之有效的方法、特别是在分子量为10~4以上的高聚物
The molecular weight of polymer is one of the most basic parameters of polymer materials, in scientific research and production practice, in order to control product performance, often need to determine this parameter. Since the advent of unsaturated polyesters in the 1930s, the end-group method (acid value method) has been used both at home and abroad to determine the molecular weight. Although the method is simple and easy to operate, there are many factors of dry blending with a large error range of over 20% . Since Mark-Houwink established the empirical relationship [η] = KM ~ α between the intrinsic viscosity [η] of the polymer solution and the polymer molecular weight M, the viscosity was used to determine the molecular weight to control the quality of the polymer Effective method, especially in the molecular weight of 10 ~ 4 above polymer