Miscibility of Polymer Blends Comprising Poly (Ethylene Oxide) - Epoxidized Natural Rubber

Nawawi, Mohd Azizi; Har, Sim Lai; Chan, Chin Han

doi:10.7763/ijcea.2012.v3.230

Cited by 9 publications

(9 citation statements)

References 4 publications

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“…4. This implies that these blends are immiscible under the experimental conditions, in agreement with the T g results in this study and similar observations recorded for immiscible blends in references 56 and 68. In general, in a blend including a semicrystalline polymer, the melting behaviour of the semicrystalline polymer is affected by the miscibility of the binary blend.…”

Section: Resultssupporting

confidence: 91%

Correlation of thermal, morphological and melt rheological properties of miscible poly(ethylene oxide)/poly(methyl acrylate) and immiscible poly(ethylene oxide)/poly(n‐butyl methacrylate) blends

Zainal

Lai²,

Ramli

2023

Polymer International

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This study presents the correlation of thermal, morphological and melt rheological properties of poly(ethylene oxide)/poly(methyl acrylate) (PEO/PMA) blends and PEO/poly(n‐butyl methacrylate) (PEO/PnBMA) blends. The miscibility and correlation of these properties were assessed through thermal analysis such as glass transition temperature (Tg) and apparent melting temperature (Tm), morphological study and melt rheological analysis of the blends. The results show that PEO/PMA blends are miscible as suggested by the number of Tg values that follow the Fox equation and the development of homogeneous mixtures in the molten state (T = 80 °C). On the other hand, PEO/PnBMA blends are immiscible as shown by the constancy of the Tg values of PEO throughout the blend compositions. The immiscibility was confirmed by optical microscopy which shows the matrix‐droplet and co‐continuous morphologies (i.e. heterogeneous mixtures) in the PEO/PnBMA blends at T = 80 °C. Melt rheological properties of the immiscible PEO/PnBMA blends are affected by the blend compositions and show significant deviation from Maxwell behaviour. Conversely, the rheological properties of the miscible PEO/PMA blends show close to Maxwell behaviour. Hence, the correlation of thermal, morphological and melt rheological studies is discussed for both miscible and immiscible PEO/polyacrylate blends. © 2023 Society of Industrial Chemistry.

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Section: Resultssupporting

confidence: 91%

Correlation of thermal, morphological and melt rheological properties of miscible poly(ethylene oxide)/poly(methyl acrylate) and immiscible poly(ethylene oxide)/poly(n‐butyl methacrylate) blends

Zainal

Lai²,

Ramli

2023

Polymer International

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“…The compatibility between them plays an important role in the morphology, phase structure, and properties of the blends’ inevitably. Homogeneous phase structure due to good compatibility and macroscopic phase separation owing to complete incompatibility are not desirable for polymer blending [ 14 ]. In contrast, performance can often be enhanced by reason of multiphase structure of materials.…”

Section: Introductionmentioning

confidence: 99%

Molecular Dynamic and Dissipative Particle Dynamic Simulation on the Miscibility of NR/CR Blends

Yuan

Jiang

et al. 2023

Polymers

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Natural rubber (NR) exhibits good elasticity, flexural resistance, wear resistance, and excellent mechanical properties, and it has been widely used in aerospace, transportation, medical, and health fields. For NR, however, the resistance to thermal-oxidation and ozone aging is fairly poor. Although aging properties of NR can be significantly improved with the incorporation of chloroprene rubber (CR) according to some references, the miscibility between NR and CR, the morphologies of the binary blends, and so on are revealed ambiguously. In this work, molecular dynamics simulation (MD) and dissipative particle dynamics (DPD) simulation were carried out to predict the compatibility between natural rubber and chloroprene rubber in view of Flory–Huggins parameters. The morphologies of the blends were obtained with the use of the DPD method. The simulation results were furtherly examined by means of Fourier transform infrared spectroscopy (FT-IR) and dynamic mechanical analysis (DMA). It was found that the miscibility between NR and CR is poor. Nevertheless, the miscibility could be improved when the content of CR is 50% or 90%. In addition, spinodal decomposition with a critical temperature of 390 K would take place according to the phase diagram. Microphase structure such as spherical, lamellar, and bicontinuous phases can be found with different contents of CR in the blends with the results of morphologies analysis.

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“…Rubber materials (such as ethylenepropylene-diene monomer rubber, [5] nitrile rubber, [6] cerium oxide/silicone rubber, [7] natural rubber (NR), [8] nitrile butadiene rubber, [9,10] and polychloroprene rubber) [11] will readily lose their properties when subjected to radiation, thermal, oxidation, or compressive stresses. [12,13] The loss of function mechanism has generally been attributed to the oxidation of the molecular structure, a process that forms oxygenated species. As a result, the hardness, tensile strength, friction surface characteristics, friction mechanism, and thermal stability of these materials change.…”

Section: Introductionmentioning

confidence: 99%

Thermo‐Oxidative Aging Behavior and Lifetime Prediction of Rubber Latex Foam with Various Natural‐to‐Synthetic Ratios

et al. 2023

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Rubber latex foam (RLF) is widely used in daily life and its characteristics are active areas of research. However, the thermo‐oxidative aging behaviors of RLF at high temperatures have not been elucidated in detail. Herein this study, the aging degree and characteristics of five types of RLF materials with various ratios of natural rubber latex and synthetic rubber latex are investigated by using the yellowness index (YI), whiteness index, cross‐linking density, indentation density, and infrared spectrum. It is indicated in the results that the structural failure degree, YI, and cross‐linking density of the sample increased linearly with increasing natural‐to‐synthetic ratio (N/R ratio). It is observed that all RLF samples with various N/R ratios undergo aging reactions during the aging process, but the aging degree and aging rate of the samples differ. Furthermore, a lifetime prediction model is calculated by the standard method and the variable activation energy method, and the YI of RLF is used as an index to evaluate the service life, which serves as a useful tool for the quality evaluation of RLF.

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Miscibility of Polymer Blends Comprising Poly (Ethylene Oxide) - Epoxidized Natural Rubber

Cited by 9 publications

References 4 publications

Correlation of thermal, morphological and melt rheological properties of miscible poly(ethylene oxide)/poly(methyl acrylate) and immiscible poly(ethylene oxide)/poly(n‐butyl methacrylate) blends

Correlation of thermal, morphological and melt rheological properties of miscible poly(ethylene oxide)/poly(methyl acrylate) and immiscible poly(ethylene oxide)/poly(n‐butyl methacrylate) blends

Molecular Dynamic and Dissipative Particle Dynamic Simulation on the Miscibility of NR/CR Blends

Thermo‐Oxidative Aging Behavior and Lifetime Prediction of Rubber Latex Foam with Various Natural‐to‐Synthetic Ratios

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