Thermal Properties and Intermolecular Interaction of Blends of Poly(ethylene oxide) and Poly(methyl acrylate)

Halim, Suhaila Idayu Abdul; Chan, Chin Han; Sim, Lai Har

doi:10.1002/masy.201650011

Cited by 18 publications

(15 citation statements)

References 38 publications

(35 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Refering to Figure (a), there is no significant shifting of the wavenumbers noted of the triplet of v (C‐O‐C) mode at 1144, 1094 and 1059 cm −1 for neat PEO until W PEO ≤ 0.2, they shift to 1155 cm −1 as the centre absorption band and to 1194 and 1118 cm −1 as the two shoulders. FTIR study suggests that the miscibility of PEO/PMA blends may not be due to any specific intermolecular interaction between the components, but only weak intermolecular interaction [ i.e., This suggestion is supported by studies reported in the literature . It may due to entropy effect instead of by enthalpy effect] between PEO and PMA in the blends.…”

Section: Resultssupporting

confidence: 68%

See 1 more Smart Citation

Thermal, Conductivity and Molecular Interaction Studies of Poly(ethylene oxide)/Poly(methyl acrylate) Solid Polymer Electrolytes

Halim

Chan

Winie

2017

Macromolecular Symposia

Self Cite

View full text Add to dashboard Cite

Summary Solid polymer electrolytes of poly(ethylene oxide) (PEO) and poly(methyl acrylate) (PMA) with addition of lithium perchlorate (LiClO4) were studied. Samples were prepared by solution casting method. An existence of single and compositional‐dependant glass transition temperature (Tg) of PEO/PMA systems [studied by Differential scanning calorimetry (DSC)] shows miscibility of the binary PEO/PMA blends as well as when added with small of amount of LiClO4 in the molten state and amorphous phase. The systems are miscible in molten state and amorphous phase at high salt content with PEO content in the blends is in excess. In this case, the Tgs of the PEO/PMA blends increase slightly with increasing salt concentration suggesting the molecular interaction of salt with the polymers. Impedance spectroscopy (IS) studies reveal that PEO/PMA 80/20 blend (w/w) added with 0.12 of LiClO4 (YS) shows the highest conductivity (σDC = 1.43 × 10−5 S cm−1) as compared to PEO/LiClO4 system at the same salt concentration (σDC = 6.43 ×10−6 S cm−1). Results of Tg using DSC and molecular interaction from Fourier‐transform infrared (FTIR) spectra suggest that blend with PEO in excess, Li+ ions coordinate with ether oxygen of PEO instead of carbonyl oxygen of PMA. Hence, the percolation pathway for these SPEs is lying in the amorphous region of the PEO phase.

show abstract

Section: Resultssupporting

confidence: 68%

“…From previous study, blending of PEO ( T g ∼ −52 °C) with PMA ( T g ∼ 13 °C) is miscible for the entire composition . The T g s of the blends are below room temperature (∼25 ° C), which are suitable to be the polymer hosts of SPE …”

Section: Introductionmentioning

confidence: 94%

Thermal, Conductivity and Molecular Interaction Studies of Poly(ethylene oxide)/Poly(methyl acrylate) Solid Polymer Electrolytes

Halim

Chan

Winie

2017

Macromolecular Symposia

Self Cite

View full text Add to dashboard Cite

show abstract

“…For PEO-blend based SPEs, PEO shows miscibility with some polyacrylates. Polyacrylates such as poly(methyl methacrylate) (PMMA), [4,53,54] poly(methyl acrylate) (PMA), [55][56][57] polyacrylate copolymer (PAc) [58,59] are miscible with PEO at low content of inorganic salt (<15 wt%). PEO is immiscible with poly(n-butyl methacrylate) (PnBMA).…”

Section: Introductionmentioning

confidence: 99%

Thermal Properties and Morphology of Poly(ethylene oxide)/Poly(n‐butyl methacrylate) Blends

Ramli

Chan

Ali

2018

Macromolecular Symposia

View full text Add to dashboard Cite

From the thermodynamic point of view, most of the high molar‐mass binary polymer blends are immiscible due to the entropic contribution to the free energy of mixing is relatively small. The miscibility of the systems on the molecular scale can be assessed by the thermal properties such as quantities of glass transition temperature (Tg) and change in heat capacity (ΔCp) of the polymers. For a semi‐crystalline polymer such as poly(ethylene oxide) (PEO), the crystallinity (X*) and the melting temperature (Tm) can also give some hints on the miscibility. Apart from the thermal properties, additional scientific findings such as morphology of the blends are needed as supplementary evidences to support the results. We focus on the PEO as the polymer host, blends with poly(n‐butyl methacrylate) (PnBMA) which were prepared using solution casting technique. Thermal properties of PEO/PnBMA polymer blends were investigated by modulated differential scanning calorimeter (MDSC) on the isothermal crystallized samples at 25 °C. Tg of PEO in the blends do not show significant variation with addition of PnBMA for entire composition range while for Tg of PnBMA in the blends, it is challenging to be estimated under the experimental condition due to the overlapping of the Tg of PnBMA and melting endotherm of PEO. Constancy of quantity Tg of PEO and ΔCp of PEO corresponding to the content of PEO in the blends suggest that PEO and PnBMA are immiscible for entire blend composition. X* and Tm of PEO in the blends show insignificant variation in PEO/PnBMA blends, when PEO as major component. This implies that these blends are immiscible under the experimental conditions as agreed with results of Tg and ΔCp. Spherulitic morphologies of PEO in the blends were studied by polarized optical microscopy (POM). PnBMA phase disperses randomly in PEO matrix when PEO in excess. The absence of significant change for the fibrillar spherulitic structures of PEO spherulites with addition of PnBMA (when PEO is the major component) suggests that immiscibility of PEO and PnBMA. Besides, the crystalline structure of PEO in PEO/PnBMA blends using X‐ray diffraction (XRD) reveals that the crystalline structure of PEO is not disturbed with the addition of PnBMA when PEO is in excess as the two distinct peaks of PEO do not shift as compared to neat PEO. Impedance spectroscopy (IS) studies show that the ionic conductivities (σDC) of the polymer blends at room temperature slightly increase with increasing of PEO with the order of magnitude of 10−11–10−10 S cm−1. This system serves as a potential polymer host as solid polymer electrolytes when added with inorganic salt.

show abstract

“…Data is retrieved from (Zainal et al, 2017). Table 3 lists the E a quantities for different systems estimated using the Hoffman's Arrhenius-like relationship, retrieved from (Halim, Chan, & Sim, 2016;Zainal et al, 2017).…”

Section: Thermogravimetrymentioning

confidence: 99%

Thermal analysis: basic concept of differential scanning calorimetry and thermogravimetry for beginners

Zainal

Saiter

Halim

et al. 2020

Chemistry Teacher International

Self Cite

View full text Add to dashboard Cite

We present an overview for the basic fundamental of thermal analysis, which is applicable for educational purposes, especially for lecturers at the universities, who may refer to the articles as the references to “teach” or to “lecture” to final year project students or young researchers who are working on their postgraduate projects. Description of basic instrumentation [i.e. differential scanning calorimetry (DSC) and thermogravimetry (TGA)] covers from what we should know about the instrument, calibration, baseline and samples’ signal. We also provide the step-by-step guides for the estimation of the glass transition temperature after DSC as well as examples and exercises are included, which are applicable for teaching activities. Glass transition temperature is an important property for commercial application of a polymeric material, e.g. packaging, automotive, etc. TGA is also highlighted where the analysis gives important thermal degradation information of a material to avoid sample decomposition during the DSC measurement. The step-by-step guides of the estimation of the activation energy after TGA based on Hoffman’s Arrhenius-like relationship are also provided.

show abstract

Thermal Properties and Intermolecular Interaction of Blends of Poly(ethylene oxide) and Poly(methyl acrylate)

Cited by 18 publications

References 38 publications

Thermal, Conductivity and Molecular Interaction Studies of Poly(ethylene oxide)/Poly(methyl acrylate) Solid Polymer Electrolytes

Thermal, Conductivity and Molecular Interaction Studies of Poly(ethylene oxide)/Poly(methyl acrylate) Solid Polymer Electrolytes

Thermal Properties and Morphology of Poly(ethylene oxide)/Poly(n‐butyl methacrylate) Blends

Thermal analysis: basic concept of differential scanning calorimetry and thermogravimetry for beginners

Contact Info

Product

Resources

About