Abstract:The use of transparent polymers as an alternative to glass has become widespread. However, the direct exposure of these materials to climatic conditions of sunlight and heat decrease the lifetime cost of these products. The aim of this study was to minimize the harm caused by ultraviolet (UV) radiation exposure to transparent poly(methylmethacrylate) (PMMA), which usually leads to changes in the physical and chemical properties of these materials and reduced performance. This was achieved using environmentally friendly cellulose acetate butyrate (CAB). The optical, morphological, and thermal properties of CAB blended with transparent PMMA was studied using UV-VIS spectrophotometry, scanning electron microscopy, X-ray diffraction, dynamic mechanical analysis, and thermal gravimetric analysis. The results show that CAB was able to reduce the effects of UV radiation by making PMMA more transparent to UV light, thereby preventing the negative effects of trapped radiation within the compositional structure, while maintaining the amorphous structure of the blend. The results also show that CAB blended with PMMA led to some properties commensurate with the requirements of research in terms of a slight increase in the value of the modulus and the glass transition temperature for the PMMA/CAB blend.
To obtain a high transmittance blend within ultraviolet and visible regions, various transparent samples of ascending percentages of polymethylmethacrylate (PMMA)/cellulose acetate propionate (CAP) were prepared by melt blending using a twin screw extruder. These blends were characterised by ultraviolet-visible spectroscopy, and the curves illustrated that the blending ratio of 10% CAP in PMMA meets the required purpose. The morphological, mechanical, and thermal properties for pure PMMA and the PMMA/CAP 10% blend were investigated using X-ray diffraction, scanning electron microscopy, dynamic mechanical analysis, and thermogravimetric analysis. The results showed that the PMMA/CAP 10% blend has an amorphous structure and low stiffness than pure PMMA. The miscible PMMA/CAP 10% blend exhibited mechanical stability below the glass transition temperature (Tg), with a slight increase in Tg value relative to that of pure PMMA. The study also demonstrated that the intermolecular interaction between blend elements has an effective influence on the physical properties of the blend.
A Transparent nanocomposite consist of polysulfone (PSF), cellulose acetate butyrate (CAB) and nano indium oxide (nanoIn 2 O 3) was prepared by melting and re-molding so as to safeguard from the impact of ultraviolet rays. By means of scanning electron microscope (SEM), X-ray diffraction (XRD), UV-Vis spectroscopy, dynamic mechanical analysis (DMA) and thermogravimetric analysis (TGA), the morphological, optical, mechanical and thermal properties were studied. As we reported before that PSF/0.2%CAB implies low ultraviolet light absorption for PSF and CAB transparent blend. In the present study, we investigated the effect of nanoIn 2 O 3 on the characteristics of PSF/0.2%CAB/nanoIn 2 O 3 Tricomposite. The results showed that the inorganic nano particles are well dispersed in the PSF matrix without macro phase separation, as well as assisting to spread the organic component CAB. The UV-Vis spectroscopy showed that 0.02%nanoIn 2 O 3 is able to shield PSF from UV radiation. So, we've got dual protection transparent eco-friendly nanocomposite from UV rays and is also able to protect the surfaces from the impact of these rays if used as a protection them. The XRD pattern of pure PSF clarified that there is a noticeable decrease in the bundle peaks in bi-composite and Tricomposite pattern. Furthermore, the Tricomposite showed high stability to temperatures lower than T ɡ .
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