Rheological, thermal and morphological properties of polyethylene terephthalate/polyamide 6/rice husk ash composites

Costa, Anna Raffaela M.; Lima, Jacqueline Miranda de; Santos, Raquel dos; Barreto, Lhaira Souza; Henrique, Mariana Alves; Carvalho, Laura H.; Almeida, Yêda Medeiros Bastos de

doi:10.1002/app.50916

Cited by 9 publications

(2 citation statements)

References 46 publications

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“…Poly(ethylene terephthalate) (PET) is used widely in packaging, household items, and textiles because of its superior properties such as high strength and toughness, excellent abrasion and heat resistance, and good chemical resistance. − PET is often combined with PAs ,, to create functional composites. The combination of PET and PAs represents approximately 91% of the synthetic microfibers produced worldwide .…”

Section: Introductionmentioning

confidence: 99%

Tuning Interfacial Adhesion in Polyester/Polyamide Systems

Machikiti,

Pourdeyhimi,

Genzer

et al. 2023

Ind. Eng. Chem. Res.

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Polymer−polymer adhesion is critical in polymer processing and application areas where lamination, welding, composites, blending, and coextrusion are involved. Polyethylene terephthalate/polyamide (PET/PA) pairs are widely used to produce bicomponent fibers. The strong adhesion due to the formation of chemical bonds in the interfacial region limits postproduction fiber processing. The adhesion strength in the PET/PA systems showed that PET/PA66 had the highest adhesion energy, followed by PET/PA6, PET/PA11, and PET/PA12 for all processing conditions. We developed a method that enables adhesion control by introducing a poly(octadecene-alt-maleic anhydride) (POMA) alternating copolymer by either direct interfacial modification or addition into the PET phase. Upon POMA introduction to the system, the reduction in interfacial adhesion strength between PET and polyamides is observed. We established the relationship between adhesion strengths in PET/polyamide systems, processing conditions, and concentration of the POMA modifier.

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Section: Introductionmentioning

confidence: 99%

Tuning Interfacial Adhesion in Polyester/Polyamide Systems

Machikiti,

Pourdeyhimi,

Genzer

et al. 2023

Ind. Eng. Chem. Res.

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“…Recently, natural fillers, or biofillers, have been gaining attention as a modifier in polymer composites, considering the low cost and great availability, as well as potentially increasing the performance of the polymers mixed with them, including rice hull (or rice husks) and coffee chaff (or coffee silverskin) [ 8 , 9 , 10 ]. Rice hull is a significant agricultural waste by-product from the rice milling that consists of up to 20% wt.…”

Section: Introductionmentioning

confidence: 99%

Influence of Biofillers on the Properties of Regrind Crystalline Poly(ethylene terephthalate) (CPET)

2022

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As the demand for plastics only increases, new methods are required to economically and sustainably increase plastic usage without landfill and environmental accumulation. In addition, the use of biofillers is encouraged as a way to reduce the cost of the final resin by incorporating agricultural and industrial waste by-products, such as rice hulls and coffee chaff to further reduce waste being sent to landfills. Crystalline poly(ethylene terephthalate) (CPET) is a resin commonly used for microwave and ovenable food packaging containers that have not been fully explored for recycling. In this article, we investigate how the incorporation of biofillers at 5% wt. and 10% wt. impacts critical polymer properties. The thermal and mechanical properties were not significantly altered with the presence of rice hulls or coffee chaff in the polymer matrix at 5% wt. loading, but some reduction in melt temperature, thermal stability, and maximum stress and strain was more noticed at 10% wt. The complex viscosity was also reduced with the introduction of biofillers. The levels of heavy metals of concern, such as Cd, Cr, and Pb, were below the regulatory limits applicable in the United States and Europe. Additional studies are suggested to improve the performance of CPET/biofiller blends by pre-treating the biofiller and using compatibilizers.

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From Polyester Plastics to Diverse Monomers via Low‐Energy Upcycling

Ji,

Meng,

et al. 2024

Advanced Science

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Polyester plastics, constituting over 10% of the total plastic production, are widely used in packaging, fiber, single‐use beverage bottles, etc. However, their current depolymerization processes face challenges such as non‐broad spectrum recyclability, lack of diversified high‐value‐added depolymerization products, and crucially high energy consumption. Herein, an efficient strategy is developed for dismantling the compact structure of polyester plastics to achieve diverse monomer recovery. Polyester plastics undergo swelling and decrystallization with a low depolymerization energy barrier via synergistic effects of polyfluorine/hydrogen bonding, which is further demonstrated via density functional theory calculations. The swelling process is elucidated through scanning electron microscopy analysis. Obvious destruction of the crystalline region is demonstrated through X‐ray crystal diffractometry curves. PET undergoes different aminolysis efficiently, yielding nine corresponding high‐value‐added monomers via low‐energy upcycling. Furthermore, four types of polyester plastics and five types of blended polyester plastics are closed‐loop recycled, affording diverse monomers with exceeding 90% yields. Kilogram‐scale depolymerization of real polyethylene terephthalate (PET) waste plastics is successfully achieved with a 96% yield.

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Rheological, thermal and morphological properties of polyethylene terephthalate/polyamide 6/rice husk ash composites

Cited by 9 publications

References 46 publications

Tuning Interfacial Adhesion in Polyester/Polyamide Systems

Tuning Interfacial Adhesion in Polyester/Polyamide Systems

Influence of Biofillers on the Properties of Regrind Crystalline Poly(ethylene terephthalate) (CPET)

From Polyester Plastics to Diverse Monomers via Low‐Energy Upcycling

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