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https://www.selleckchem.com/products/gsk2656157.html In the present paper, four fully biobased homopolyesters of 2,5-furandicarboxylic acid (2,5-FDCA) with a high molecular weight have been successfully synthesized by two-stage melt polycondensation, starting from the dimethyl ester of 2,5-FDCA and glycols of different lengths (the number of methylene groups ranged from 3 to 6). The synthesized polyesters have been first subjected to an accurate molecular characterization by NMR and gel-permeation chromatography. Afterward, the samples have been successfully processed into free-standing thin films (thickness comprised between 150 to 180 μm) by compression molding. Such films have been characterized from the structural (by wide-angle X-ray scattering and small-angle X-ray scattering), thermal (by differential scanning calorimetry and thermogravimetric analysis), mechanical (by tensile test), and gas barrier (by permeability measurements) point of view. The glycol subunit length was revealed to be the key parameter in determining the kind and fraction of ordered he mechanical and barrier properties, these last being particularly outstanding for PPeF, the polyester with the highest fraction of mesophase among those synthesized in the present work. Art-making can pose significant risks to the health and safety of artists. Some art materials and equipment are hazardous. This article highlights the various hazards caused by the use of these materials in art-making and actions that could be taken to prevent it. We used documentary research approaches to find out and study the relevant literature sources and to analyze and synthesize the information got. The results showed that art students and lecturers are not aware of the health hazards of art materials they use in their art practice, and they have a nonchalant attitude towards taking appropriate health precautions in the use of these art materials. We also observed that changing the attitudes of university art students,

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