三嵌段含氟聚合物的纳米组织

IF 0.6 4区 材料科学 Q4 CRYSTALLOGRAPHY Crystallography Reports Pub Date : 2024-07-25 DOI:10.1134/S106377452460039X
L. V. Sokolova, A. V. Losev, A. N. Chrustalev, V. V. Volkov
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引用次数: 0

摘要

摘要 三嵌段含氟聚合物(三元共聚物)具有两级纳米组织。根据 X 射线衍射和红外光谱数据,这些组织层次在相变的诱导下发生了变化。第一级组织主要由尺寸为 1.5-2 纳米的纳米结构形成,而根据小角 X 射线散射数据,第二级组织的纳米结构的主要尺寸约为 40 纳米。尤其是在 170°С(比三元共聚物的粘流温度高出约 120°С)条件下 20 分钟内,三元共聚物中形成了三种类型的纳米结构,其尺寸分别为 1.5、56 和 130 nm,平均平面间距分别为 5.11、3.55 和 7.14 Å。热处理时间延长到 90 分钟后,纳米结构的结构参数主要发生了后两种类型的变化。温度引起的三元共聚物热膨胀系数、刚度和机械损失正切的变化是由聚合物复杂纳米组织的具体特征决定的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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Nano-organization of Triblock Fluorocopolymer

Triblock fluorocopolymer (terpolymer) is characterized by two levels of nano-organization. According to the X-ray diffraction and IR spectroscopy data, these levels of organization undergo changes induced by phase transitions. The first level of organization is formed mainly by nanostructures with sizes of 1.5–2 nm, whereas the predominant size of nanostructures at the second level of organization is ~40 nm according to small-angle X-ray scattering data. In particular, three types of nanostructures with sizes of 1.5, 56, and 130 nm and average interplanar distances of  5.11, 3.55, and 7.14 Å, respectively, formed in the terpolymer within 20 min at 170°С, which is ~120°С higher than the viscous flow temperature of the terpolymer. An increase in the time of thermal treatment to 90 min leads to a change in the structural parameters of nanostructures mainly of the last two types. The temperature-induced changes of the thermal expansion coefficient, the rigidity, and the mechanical loss tangent of the terpolymer are determined by the specific features of the complex nano-organization of the polymer.

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来源期刊
Crystallography Reports
Crystallography Reports 化学-晶体学
CiteScore
1.10
自引率
28.60%
发文量
96
审稿时长
4-8 weeks
期刊介绍: Crystallography Reports is a journal that publishes original articles short communications, and reviews on various aspects of crystallography: diffraction and scattering of X-rays, electrons, and neutrons, determination of crystal structure of inorganic and organic substances, including proteins and other biological substances; UV-VIS and IR spectroscopy; growth, imperfect structure and physical properties of crystals; thin films, liquid crystals, nanomaterials, partially disordered systems, and the methods of studies.
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