Kabdushev Sherniyaz, Mun Grigoriy, Suleimenov Ibragim, Alikulov Adilet, Shaikhutdinov Ramazan, Kopishev Eldar
National Engineering Academy of the Republic of Kazakhstan, Almaty 050010, Kazakhstan.
Department of Chemistry & Technology of Organic Materials, Faculty of Chemistry and Chemical Technology, Polymers and Natural Compounds, Al Farabi Kazakh National University, Almaty 050040, Kazakhstan.
Polymers (Basel). 2023 Aug 29;15(17):3578. doi: 10.3390/polym15173578.
Utilizing turbidimetry data, an examination is conducted on the behavior of solutions containing N-vinylpyrrolidone and vinyl propyl ether copolymer within a temperature range coinciding with the occurrence of a phase transition. The investigation reveals that within specific conditions prevailing in this domain, the emergence of entities denoted as hydrophobic-hydrophilic associates is conceivable. These entities are characterized by the presence of a relatively dense core, upheld by hydrophobic interplays, and they are proficient in effectively dispersing irradiation within the optical spectrum. Encircling this core is a hydrophilic periphery that impedes the formation of insoluble precipitates. The development of such associates transpires when hydrophobic interactions have attained a discernible prominence, although they remain inadequate to counteract the forces that drive the expansion of macromolecular coils. Under these circumstances, the energetically favored course of action entails the constitution of a core for the aforementioned associates, involving discrete segments from diverse macromolecules. Notably, the introduction of an additional constituent (ethanol) to the solution, which selectively mitigates hydrophobic interactions, serves to stabilize the hydrophobic-hydrophilic associations.
利用比浊法数据，对含有N - 乙烯基吡咯烷酮和乙烯基丙基醚共聚物的溶液在与相变发生相一致的温度范围内的行为进行了研究。该研究表明，在该领域普遍存在的特定条件下，可以想象会出现被称为疏水 - 亲水缔合体的实体。这些实体的特征是存在一个由疏水相互作用维持的相对致密的核心，并且它们能够有效地在光谱范围内分散辐射。围绕这个核心的是一个亲水外围，它阻碍了不溶性沉淀物的形成。当疏水相互作用达到明显突出的程度时，这种缔合体就会形成，尽管它们仍然不足以抵消驱动大分子线圈膨胀的力。在这些情况下，能量上有利的作用过程需要为上述缔合体构建一个核心，涉及来自不同大分子的离散片段。值得注意的是，向溶液中引入额外的成分（乙醇），它选择性地减轻疏水相互作用，有助于稳定疏水 - 亲水缔合。
