Characterization of Polymer Blends with FTIR Spectroscopy

Riaz, Ufana; Ashraf, S. M.

doi:10.1002/9783527645602.ch20

Cited by 46 publications

(32 citation statements)

References 124 publications

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“…Infrared spectroscopy has been considered to be an effective method for chemical structure characterization due to its high sensitivity as well as clear, fast and accurate detection of peaks [33]. The offset of characteristic absorption peaks of some functional groups provides extremely effective evidences for the occurrence of chemical reactions [34].…”

Section: Resultsmentioning

confidence: 99%

Blends of rABS and SEBS: Influence of In-Situ Compatibilization on the Mechanical Properties

Zhan

Zhu

et al. 2019

Materials

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In this study, the in-situ compatibilization reaction between recycled acrylonitrile–butadiene–styrene copolymer (rABS) and functional styrene–ethylene–butylene–styrene block maleic anhydride (SEBS-g-MAH) was confirmed, which contributed to the toughening phenomenon of rABS, especially the notched impact strength. As mechanical test that manifested, the rABS/SEBS-g-MAH blends are stronger and more ductile than the rABS/SEBS blends. Prominently, the former has great advantage over the latter in terms of improving the impact performance. Scanning electron microscope (SEM) images showed that the compatible segments that were generated by reaction not only improve the interface adhesion of rABS/SEBS-g-MAH blends but also promote the evolution of co-continuous structures, which can be evidently observed after etching. Furthermore, the SEM micrographs of tensile fracture surfaces indicated that the formation of the co-continuous phase and the improvement of interface adhesion are the most profound reasons for the excellent tensile properties of the rABS/SEBS-g-MAH blends. The impact fracture surface revealed that two-phase interface affects crack propagation and shear yielding absorbs more impact energy than simple interface debonding does at higher deformation rates. Meanwhile, rheological analysis demonstrated that the complex viscosity of the rABS/SEBS-g-MAH (80/20 wt%) blend with a co-continuous structure exhibits a maximum positive deviation at low frequencies from the theoretical value calculated using the rule of logarithmic sum, which indicated a connection between co-continuous structure and complex viscosity. In addition, the storage modulus vs. loss modulus curves of the blends revealed that the viscoelastic behavior of rABS/SEBS-g-MAH blends is very similar to that of rABS.

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Section: Resultsmentioning

confidence: 99%

Blends of rABS and SEBS: Influence of In-Situ Compatibilization on the Mechanical Properties

Zhan

Zhu

et al. 2019

Materials

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“…According to Riaz and Ashraf (2014) , the mechanical properties of a polymer blend are directly related to the molecular chain between the constituent polymers and their miscibility, in which interaction between the functional groups in the polymer blend could be observed via FTIR. The properties of a homogeneous blend are often an arithmetical average of the properties of each component whilst the miscibility of the components is usually caused by the formation of hydrogen bonds.…”

Section: Resultsmentioning

confidence: 99%

Carboxymethyl cellulose-based polyelectrolyte as cationic exchange membrane for zinc-iodine batteries

Tangthuam

Pimoei

Mohamad

et al. 2020

Heliyon

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The aim of this research is an evaluation of polyelectrolytes. In the application of zinc-iodine batteries (ZIBs), polyelectrolytes have high stability, good cationic exchange properties and high ionic conductivity. Polyelectrolytes are also cost-effective. Important component of ZIBs are cation exchange membranes (CEMs). CEMs prevent the crossover of iodine and polyiodide from zinc (Zn) electrodes. However, available CEMs are costly and have limited ionic conductivity at room temperature. CEMs are low-cost, have high stability and good cationic exchange properties. Herein, polyelectrolyte membranes prepared from carboxymethyl cellulose (CMC) and polyvinyl alcohol (PVA) are examined. It is seen that an increase in the ratio of PVA leads to enhanced ionic conductivity as well as increased iodine and polyiodide crossover. ZIBs using polyelectrolytes having 75:25 wt.% CMC/PVA and 50:50 wt.% CMC/PVA show decent performance and cycling stability. Due to their low-cost and other salient features, CMC/PVA polyelectrolytes prove they have the capacity for use as cation exchange separators in ZIBs.

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“…The most common comp lexat ion is the intermolecular hydrogen (H-) bonding due to the presence of highly electronegative elements such as N, O, o r F [17]. Co mplexation could change the mo lecular chain which affect the physical properties, thereby improving the thermal and electrical properties [18]. Obvious complexation can be observed at C-O-C,-COO -, and-OH peaks, where their intensity and wavenumber have reduced or shifted.…”

Section: Resultsmentioning

confidence: 99%

Molecularly Conductive Behavior of Blended Polymer Electrolyte-based CMC/PVA

Ali¹,

Zhang²,

Nagao³

et al. 2019

MST

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This study investigated the electrical conduction and structural behavior of blended polymer electrolyte (BPE)-based carboxymethyl cellulose (CMC) and polyvinyl alcohol (PVA) in the development of solid-state electrochemical devices. Based on impedance spectroscopy and correlating Fourier transform infrared (FTIR) with thermogravimetric analysis, a framework was proposed to explain the structural enhancement of the BPE system. As revealed by FTIR, the optimum conductivity of CMC/PVA BPEs was 9.21 × 10−6 Scm−1 for 80:20 composition attributed to the intermolecular attraction between the polymers. Thermal stability of the CMC/PVA was influenced by the formation of a hydrogen bond between the hydroxyl (-OH), carboxylate (-COO-), and ether linkage (-COC-) functional groups. The finding provides insights into blended polymer electrolyte-based CMC/PVA, which is beneficial in designing safe, thin, and lightweight energy storage devices. AbstractPenilaian Kekonduksian dan CMC/PVA Filem Nipis Polimer Campuran. Karya ini menyelidiki penemuan pengaliran elektrik dan tingkah laku struktur elektrolit polimer campuran (BPEs) berasaskan carboxymethyl cellulose (CMC) dan polivinil alkohol (PVA) ke arah pembangunan peranti elektrokimia keadaan pepejal. Berdasarkan spektroskopi impedans (EIS) dan mengaitkan fourier transform inframerah (FTIR) dengan analisis thermogravimetric (TGA), kami telah mencadangkan satu rangka kerja untuk menjelaskan peningkatan struktur sistem BPE. Kekonduksian optima CMC/PVA BPEs dicapai ialah 9.21 x 10 -6 Scm -1 untuk komposisi 80:20 yang dikaitkan dengan tarikan dengan molekul antara polimer yang telah didedahkan oleh FTIR. Kestabilan haba CMC/PVA didapati dipengaruhi oleh pembentukan ikatan hidrogen antara kumpulan berfungsi hidroksil (-OH), karboksilat (-COO -) dan rantaian ether (-COC-). Penemuan ini memberi beberapa pandangan tentang polimer campuran yang diadaptasi berasaskan CMC/PVA yang bermanfaat dalam mereka bentuk peranti simpanan yang selamat, nipis dan ringan.

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Characterization of Polymer Blends with FTIR Spectroscopy

Cited by 46 publications

References 124 publications

Blends of rABS and SEBS: Influence of In-Situ Compatibilization on the Mechanical Properties

Blends of rABS and SEBS: Influence of In-Situ Compatibilization on the Mechanical Properties

Carboxymethyl cellulose-based polyelectrolyte as cationic exchange membrane for zinc-iodine batteries

Molecularly Conductive Behavior of Blended Polymer Electrolyte-based CMC/PVA

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