Abstract The phase behavior of low-density polyethylene mixtures with 1,2,4,5 – tetrachlorobenzene and camphor is investigated by optical methods and differential scanning calorimetry. The use of a photoconductive cell integrated into an optical microscope equipped with a heating stage, allows us, for the first time, to combine turbidimetry with visual observations to detect crystallization of a low-molar-mass substance from the amorphous regions of a semicrystalline polymer. Crystallization in the restrained conditions of an apparently solid polymer matrix leads to crystals much smaller than the low-molar-mass crystals formed in a mixture with the melted polymer. We discuss the details of reversible structural changes taking place to the binary mixtures of crystallizable components in the course of their heating and cooling. Constructed phase diagrams provide important information for developing technologies based on thermally induced phase separation in such systems.

中文翻译：

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结合光学显微镜、浊度法和 DSC 研究半结晶聚合物与低摩尔质量可结晶物质混合物的结构转变

摘要 用光学方法和差示扫描量热法研究了低密度聚乙烯与 1,2,4,5-四氯苯和樟脑混合物的相行为。使用集成到配备加热台的光学显微镜中的光电导电池，使我们第一次将浊度法与目视观察相结合，以检测低摩尔质量物质从半结晶聚合物的无定形区域结晶. 在明显固体聚合物基质的受限条件下结晶导致晶体比在与熔融聚合物的混合物中形成的低摩尔质量晶体小得多。我们讨论了可结晶组分的二元混合物在加热和冷却过程中发生的可逆结构变化的细节。