Abstract
In this study, not only was the similar terephthalate structure between UIO-66 and PET utilized to improve compatibility, but the Zr4+ exposed by defects of UIO-66 was also utilized to improve the interaction between PET and UIO-66. Furthermore, PET nanocomposites with different contents of UIO-66 were also fabricated. Due to the high specific surface area and coordination of Zr4+, UIO-66 has high nucleation efficiency in the PET matrix. Compared with pure PET, the crystallization rate of PET/UIO-66 nanocomposite is significantly increased, and the crystallization temperature of PET-UIO66-1 is significantly increased from 194.3 °C to 211.6 °C. In addition, the tensile strength of nanocomposites has also been improved due to coordination.
Highlights
Poly(ethylene terephthalate) (PET), a thermoplastic semi-crystalline polymer [1], has been extensively employed in the industrial applications of packaging materials, optical materials and engineering plastics, due to its prominent physical and chemical properties [2,3]
The nucleating agent aims to implement the principle of heterogeneous nucleation by introducing foreign matters into a polymer matrix to replace the nucleation of the polymer, thereby effectively facilitating the crystallization and reducing the crystal size
The crystallization behavior of the PET/UIO-66 nanocomposites was examined with Q20 Differential Scanning Calorimeter (TA, New Castle, DE, USA)
Summary
Poly(ethylene terephthalate) (PET), a thermoplastic semi-crystalline polymer [1], has been extensively employed in the industrial applications of packaging materials, optical materials and engineering plastics, due to its prominent physical and chemical properties (e.g., high strength and high thermal stability) [2,3]. The slow crystallization rate seriously limits the application of the PET in engineering plastics fields [4], especially the manufacture of injection molded products On the whole, such products with PET as the raw material require longer molding cycles and higher mold temperatures to be well prepared [5,6]. The comm oofn modification method of inorganic particles is to form a core–shell structure by covering a layer of organic materials on the surface of inorganic ions. Such a method can improve the compatibility between PET and inorganic particles, the specific surface area ofimthpernouvceletahteinnguacgleeanttioisnneafrfircoiwenecdy, tohferthebeynhuicnldeaetriinngg tahgeenfutr[t2h4e]r. All the chemicals were directly employed without being further purified
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