Abstract

Deformation of amorphous glassy poly(ethylene terephthalate) (PET) films in liquid adsorption-active media (AAMs) by the crazing mechanism has been studied. The crazing has been shown to be an efficient method for the formation of a finely dispersed mesoporous structure in the polymer. A technique has been developed for stabilizing the structure of crazed PET by its annealing in the presence of an AAM under conditions that prevent the polymer from shrinkage. The porosity and vapor permeability of the obtained PET-based materials have been studied as depending on the deformation and annealing conditions. It has been revealed that the stability of the mesoporous structure formed in PET films after their annealing in the AAM results from polymer crystallization. The obtained structure is characterized by anisotropic relief and wettability of the surface.

中文翻译：

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裂纹机理使聚对苯二甲酸乙二醇酯的介孔结构稳定

摘要

通过裂纹机理研究了非晶态玻璃状聚对苯二甲酸乙二醇酯（PET）薄膜在液体吸附活性介质（AAM）中的变形。裂纹已被证明是在聚合物中形成细分散的中孔结构的有效方法。已经开发了通过在防止聚合物收缩的条件下在AAM的存在下对其退火进行退火来稳定发狂的PET的结构的技术。根据变形和退火条件，已经研究了所得PET基材料的孔隙率和蒸汽渗透性。已经发现，在PET膜中在AAM中退火之后形成的中孔结构的稳定性是由聚合物结晶导致的。