Influence of zirconium(IV) in polyurethane based on hydroxyl telechelic natural rubber for coating application

Phetthong, Chatcha; Nakaramontri, Yeampon; Marthosa, Sutida; Anancharoenwong, Ekasit

doi:10.1007/s11998-021-00463-3

Cited by 4 publications

(4 citation statements)

References 46 publications

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“…The unique signal of NR appeared at 5.14 ppm (-CH 3 C=C H -, a), corresponding to the methine proton adjacent to the isoprene unit of NR. After the oxidative cleavage reaction, the obtained MNR showed similar signals with the starting NR material and three new signals with small intensity were observed at 1.28 ppm (-C H 3 CH-OH, d), 3.65 ppm (-C H 2 -OH, c), and 3.75 ppm (-CH 3 C H -OH, b), associated with the proton adjacent to the hydroxyl group [ 43 ].…”

Section: Resultsmentioning

confidence: 99%

Sustainable Materials with Improved Biodegradability and Toughness from Blends of Poly(Lactic Acid), Pineapple Stem Starch and Modified Natural Rubber

Tessanan,

Phinyocheep,

Amornsakchai

2024

Polymers

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Poly(lactic acid) (PLA), derived from renewable resources, plays a significant role in the global biodegradable plastic market. However, its widespread adoption faces challenges, including high brittleness, hydrophobicity, limited biodegradability, and higher costs compared to traditional petroleum-based plastics. This study addresses these challenges by incorporating thermoplastic pineapple stem starch (TPSS) and modified natural rubber (MNR) into PLA blends. TPSS, derived from pineapple stem waste, is employed to enhance hydrophilicity, biodegradability, and reduce costs. While the addition of TPSS (10 to 40 wt.%) marginally lowered mechanical properties due to poor interfacial interaction with PLA, the inclusion of MNR (1 to 10 wt.%) in the PLA/20TPSS blend significantly improved stretchability and impact strength, resulting in suitable modulus (1.3 to 1.7 GPa) and mechanical strength (32 to 52 MPa) for diverse applications. The presence of 7 wt.% MNR increased impact strength by 90% compared to neat PLA. The ternary blend exhibited a heterogeneous morphology with enhanced interfacial adhesion, confirmed by microfibrils and a rough texture on the fracture surface. Additionally, a downward shift in PLA’s glass transition temperature (Tg) by 5–6 °C indicated improved compatibility between components. Remarkably, the PLA ternary blends demonstrated superior water resistance and proper biodegradability compared to binary blends. These findings highlight the potential of bio-based plastics, such as PLA blends with TPSS and MNR, to contribute to sustainable economic models and reduce environmental impact for using in plastic packaging applications.

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Section: Resultsmentioning

confidence: 99%

Sustainable Materials with Improved Biodegradability and Toughness from Blends of Poly(Lactic Acid), Pineapple Stem Starch and Modified Natural Rubber

Tessanan,

Phinyocheep,

Amornsakchai

2024

Polymers

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“…37 Notably, previous studies have delved into the successful integration of in situ zirconia particles into rubber matrices using the sol-gel method, as documented in relevant literature. [38][39][40][41][42][43] The strategic incorporation of zirconia in rubber composites holds immense potential for enhancing their overall performance and expanding their applicability in various industries. To improve the interfacial interactions between zirconia nanoparticles and the NR matrix, mercapto-functionalized zirconia nanoparticles (SH-ZrO 2 NPs) have been used, which can covalently attach to the NR chains via ring-opening reactions.…”

Section: Introductionmentioning

confidence: 99%

“…This versatile material not only exhibits remarkable chemical resistance but also possesses invaluable thermal and optical properties, making it an attractive candidate for reinforcing elastomeric materials 37 . Notably, previous studies have delved into the successful integration of in situ zirconia particles into rubber matrices using the sol–gel method, as documented in relevant literature 38–43 . The strategic incorporation of zirconia in rubber composites holds immense potential for enhancing their overall performance and expanding their applicability in various industries.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and characterization of epoxidized natural rubber nanocomposites reinforced with mercapto‐functionalized nanozirconia filler

Toiserkani

2023

Polymer Composites

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The objective of this study was to develop a new type of nanocomposite material by reinforcing epoxidized natural rubber (ENR) through the integration of mercapto‐functionalized nanozirconia (SH‐ZrO2 NPs) synthesized using a ring‐opening reaction. The ENR was prepared through the epoxidation of natural rubber (NR) using in situ generated performic acid from formic acid and hydrogen peroxide. The SH‐ZrO2 NPs were pretreated and systematically embedded into the ENR matrix via a latex‐casting process, resulting in ENR/SH‐ZrO2 nanocomposites with enhanced properties. To prevent the accumulation of nanofillers in the ENR matrix, the surface of the nanozirconia was treated with 3‐(mercaptopropyl)trimethoxysilane (MTS) to create mercapto‐terminated ZrO2 NPs (SH‐ZrO2 NPs) that were covalently attached to the ENR chains. The presence of MTS on the surface of the nanozirconia was confirmed by FTIR and thermogravimetric analysis (TGA) analyses. Structural and morphological characterization of the resulting nanocomposites was performed using standard techniques such as x‐ray diffraction (XRD), scanning electron microscopy (SEM), and TGA. The morphological studies indicated a uniform distribution of SH‐ZrO2 NPs throughout the ENR matrix. Furthermore, TGA analysis revealed that the thermal stability of the nanocomposites was improved, as evidenced by a shift in the decomposition temperature to a higher value compared to neat ENR. Overall, this work demonstrates the potential of SH‐ZrO2 NPs as an effective reinforcing agent in ENR‐based nanocomposites, with improved thermal stability and homogeneity.Highlights Enhanced nanocomposite properties: Integration of mercapto‐functionalized nanozirconia improves the performance of epoxidized natural rubber (ENR) materials. Innovative synthesis approach: SH‐ZrO2 NPs synthesized via ring‐opening reaction offer a novel method for reinforcing ENR matrices. Improved thermal stability: ENR/SH‐ZrO2 nanocomposites exhibit higher decomposition temperatures, indicating enhanced thermal stability. Uniform dispersion: Morphological studies confirm the uniform distribution of SH‐ZrO2 NPs throughout the ENR matrix. Promising reinforcing agent: SH‐ZrO2 NPs demonstrate their potential as an effective filler for ENR‐based nanocomposites, enhancing homogeneity and performance.

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“…The low-MW NR also known as liquid NR with functional end groups, called telechelic low-MW NR (TLNR), has been applied for use as a compatibilizer [ 2 , 3 ], adhesive [ 4 ], as well as for chain extension [ 5 ] and grafting [ 6 ]. TLNR with various functional end groups has been prepared, for example, using carbonyl-terminated natural rubber (CTNR) and hydroxyl-terminated natural rubber (HTNR) [ 7 , 8 , 9 , 10 , 11 ].…”

Section: Introductionmentioning

confidence: 99%

The Preparation of Hydroxyl-Terminated Deproteinized Natural Rubber Latex by Photochemical Reaction Utilizing Nanometric TiO2 Depositing on Quartz Substrate as a Photocatalyst

et al. 2022

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Hydroxyl-terminated natural rubber (HTNR) is a product of interest for making natural rubber (NR) easy and versatile for use in a wide range of applications. Photochemical degradation using a TiO2 film that has been deposited on a glass substrate is one of the fascinating methods of producing HTNR. Nevertheless, light energy is wasted during the photodegradation process because a glass substrate has a cutoff for ultraviolet light. To enhance the effectiveness of the process, a quartz substrate was placed on the TiO2 film-coated substrate for photochemical breakdown. X-ray diffraction (XRD) spectroscopy and atomic force microscopy (AFM) were applied to investigate the TiO2 deposited on glass and quartz substrates. In addition, the influence of several factors, such as rubber and surfactant concentrations, on the reaction was investigated. After the reaction, the properties of the rubber products, including intrinsic viscosity, molecular weight, and microstructure, were determined. A unique diffraction peak for the anatase (101) phase could be observed in the TiO2 film deposited on the quartz substrate, resulting in photochemical activity and photocatalytic efficiency significantly higher than those of the substrate made of glass. In the scenario of deproteinized NR (DPNR) latex containing 10% DRC, 20% w/w H2O2, and TiO2 film coated on a quartz substrate, the HTNR could be manufactured effectively.

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Influence of zirconium(IV) in polyurethane based on hydroxyl telechelic natural rubber for coating application

Cited by 4 publications

References 46 publications

Sustainable Materials with Improved Biodegradability and Toughness from Blends of Poly(Lactic Acid), Pineapple Stem Starch and Modified Natural Rubber

Sustainable Materials with Improved Biodegradability and Toughness from Blends of Poly(Lactic Acid), Pineapple Stem Starch and Modified Natural Rubber

Fabrication and characterization of epoxidized natural rubber nanocomposites reinforced with mercapto‐functionalized nanozirconia filler

The Preparation of Hydroxyl-Terminated Deproteinized Natural Rubber Latex by Photochemical Reaction Utilizing Nanometric TiO2 Depositing on Quartz Substrate as a Photocatalyst

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