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Systematic comparison study on determination of small organics/polymer miscibility
Polymer Testing ( IF 5.1 ) Pub Date : 2020-11-01 , DOI: 10.1016/j.polymertesting.2020.106828
Zhengxi Zhu , Haibin Yang , Li Wang , Shenwei Mao , Tao Jiang , Peizhi Zhu , Qianru Wanyan , Mengting Duan

Abstract A mixture system of small molecular organics/polymer is widely applied in various industries. A relatively accurate determination of their miscibility is crucial for well understanding and predicting their phase behaviors and material properties. However, miscibility results from different literature could vary much. This study systematically compares various approaches to determine the mixture miscibility, e.g., the interaction parameter (χ), solubility, observations of the phase separation, and a deviation of glass transition temperature (Tg) or melting temperature (Tm), and demonstrates the advantages, disadvantages, general suitability of each method. Four botanical organics, i.e., β-carotene, betulinic acid, astaxanthin, and curcumin, are used as model small molecular compounds. A widely-used, noncrystallizable, hydrophobic polymer of poly(lactic-co-glycolic acid) (PLGA, LA:GA=55:45) is employed as a model polymer. This systematic comparison is expected to provide a guide to selecting a suitable determination of small organics/polymer miscibility, beneficial for better predicting the phase stability of an amorphous mixture in applications.

中文翻译:

微量有机物/聚合物混溶性测定的系统比较研究

摘要 小分子有机物/聚合物的混合体系广泛应用于各行各业。相对准确地确定它们的混溶性对于很好地理解和预测它们的相行为和材料特性至关重要。然而,来自不同文献的混溶性结果可能会有很大差异。本研究系统地比较了确定混合物混溶性的各种方法,例如相互作用参数 (χ)、溶解度、相分离的观察结果以及玻璃化转变温度 (Tg) 或熔化温度 (Tm) 的偏差,并证明了其优点,缺点,每种方法的普遍适用性。四种植物有机物,即β-胡萝卜素、桦木酸、虾青素和姜黄素,被用作模型小分子化合物。一种广泛使用的、不可结晶的、聚(乳酸-乙醇酸共聚物)的疏水聚合物(PLGA,LA:GA=55:45)被用作模型聚合物。这种系统比较有望为选择合适的有机物/聚合物混溶性测定方法提供指导,有利于更好地预测应用中无定形混合物的相稳定性。
更新日期:2020-11-01
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