Macro- and Nanoscopic Studies of Porous Polymer Swelling,Macromolecules

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Macro- and Nanoscopic Studies of Porous Polymer Swelling
Macromolecules ( IF 5.1 ) Pub Date : 2017-06-21 00:00:00 , DOI: 10.1021/acs.macromol.7b00820
Radosław Zaleski ₁ , Patrycja Krasucka ₁ , Krzysztof Skrzypiec ₁ , Jacek Goworek ₁

Affiliation

A commercial Amberlite XAD7HP resin was investigated as a typical porous polymer which swells in tetraethoxysilane (TEOS). TEOS appears to be an extremely effective polymer swelling agent; thus, it serves as an easily assimilable silica source in polymer–silica composites. The present study discusses the application of light microscopy (LM) and positron annihilation lifetime spectroscopy (PALS) for the studies of macroscopic and microscopic features during the progress of polymer swelling. LM offers precise information on the swelling in the solvent vapor, especially for the well-defined, spherically shaped particles of the polymer. The swelling of a porous polymer consists of the swelling of pore walls and adsorption of the solvent on the internal surface of the walls. PALS provides an opportunity to recognize the sequence of solvent penetration into porous polymer particles. It allows in situ monitoring of the evolution of every free volume in the sample under study.

中文翻译：

多孔聚合物溶胀的宏观和纳米研究

研究了商业Amberlite XAD7HP树脂，它是在四乙氧基硅烷（TEOS）中溶胀的典型多孔聚合物。TEOS似乎是一种非常有效的聚合物溶胀剂。因此，它可作为聚合物-二氧化硅复合材料中易于吸收的二氧化硅来源。本研究讨论了光学显微镜（LM）和正电子an灭寿命光谱（PALS）在聚合物溶胀过程中宏观和微观特征研究中的应用。LM提供了有关溶剂蒸汽中溶胀的精确信息，尤其是对于聚合物的轮廓分明的球形颗粒而言。多孔聚合物的溶胀包括孔壁的溶胀和溶剂在壁内表面上的吸附。PALS提供了识别溶剂渗透到多孔聚合物颗粒中的顺序的机会。它允许就地监测被研究样品中每个自由体积的演变。

更新日期：2017-06-21

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