Study on the Glass Transition Process of Polymer System Using Differential Scanning Calorimetry and Fourier Transform Infrared Spectroscopy

Peng, Yong-jin; Liu, Yuling; Wu, Qiang; Sun, Pingchuan

doi:10.2116/analsci.33.1071

Cited by 14 publications

(3 citation statements)

References 49 publications

(51 reference statements)

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“…Moreover, it was shown by Keddie et al 30 that the glass transition temperature (T g ) decreases as the thickness of the film is reduced. Peng et al 31 proved that the characteristic vibration modes of the same chemical group are to some extent under the influence of the glass transition process of the polymer. According to their studies, polymers with a lower T g absorb IR light at higher wavenumbers.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Probing the Metal Oxide/Polymer Molecular Hybrid Interfaces with Nanoscale Resolution Using AFM-IR

et al. 2019

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Obtaining chemical information from the buried interface of an organic coating is not straightforward. In this paper, for the first time, atomic force microscopybased infrared spectroscopy (AFM-IR) is used to probe the chemical interactions at the metal oxide/polymer interface. AFM-IR is a novel technique that provides chemical spectra with spatial resolution below the optical diffraction limits. Poly(acrylic acid) (PAA) on aluminum oxide was chosen as a model system. Two different approaches were used: a thin-layer approach and a cross-section approach. The thin layer confirmed the validity of the AFM-IR to look at the buried interface by comparison with results from the literature. Additionally, with a line scan, the exposed interfaces obtained from cross sections of thick coatings on aluminum substrates were analyzed. A semiquantitative analysis of the spectra from the line scan allowed to identify the chemical contribution coming from the polymer/metal oxide interfaces.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Probing the Metal Oxide/Polymer Molecular Hybrid Interfaces with Nanoscale Resolution Using AFM-IR

et al. 2019

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“…Recently the effects of temperature on the interplay between dewetting and phase separation, film thickness and composition ratio on the morphology evolution of PS/PVME blend thin films were investigated by Moghaddam and Xia et al respectively [2a,b] . The effect of the interaction between PS and PVME on the glass transition process of the blend at the micro‐level and phase structure and dynamics of PS/PVME blend were investigated using the FTIR and solid state NMR respectively by our group [2k,l] …”

Section: Introductionmentioning

confidence: 99%

On the Dynamic Mechanical Behavior and Importance of Weak Interactions in PS/PVME Blends

2020

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In this work, the dynamic mechanical behavior and weak interactions in a miscible blend of polystyrene/poly (vinyl methyl ether) (PS/PVME) with a mass ratio of 3 : 1 (PS/PVME 75/25) were studied using DMA detection and solid‐state NMR methods. The results showed the miscibility of the blend and the evidence of the weak C−H to O hydrogen bonding between the aromatic H in PS and O of the methoxyl group in PVME. The 1H‐13C correlation spectrum indicated the diffusion time between 13C in OCH/OCH3 of PVME and Aromatic 1H of PS was at about millisecond level which confirmed the space affinity between the Aromatic 1H and OCH/OCH3 group in this mixture. Quantum calculations were made with four model systems in solutions by comparing the solvent toluene with CHCl3. In this way it was shown that the binding energy between PVME and CHCl3 was larger than the one between PVME and toluene, explaining why PVME and PS were miscible when using toluene as a solvent but not in CHCl3. The detailed components of the binding energy between PVME and solvent molecules were also analyzed with different methods which showed the similar result. These results reported here allows opportunities for finding new blend dependent on this kind of weak interaction or design of special polymers to enhance such weak interactions.

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“…Besides routine measurements related with confirmation of film structure or composition [11], it can be used for monitoring of the phase separation of thin films made from polymer blends, e.g. PMMA/poly(4-vinyl phenol) [12], or other important structure-and thickness-dependent properties, such as Tg [13,14] of thin films. For instance, the strong dependence of the Tg of poly(ethylene terephthalate) was observed below 100 nm thin layers, and Tg reduction up to 25 °C in comparison with bulk was found for film thickness below 65 nm [15].…”

Section: Introductionmentioning

confidence: 99%

Polystyrene thin films with incorporated borane clusters for electronic applications investigated by infrared reflection-absorption spectroscopy

Hanulíková

Čapková

Antoš

et al. 2020

NANOCON Conference Proeedings

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The paper is focused on the investigation of thin polystyrene (PS) films and PS films with incorporated anti-octadecaborane( 22) (anti-B18H22) clusters (PS+B18H22) with a thickness of 450 nm and 290 nm, respectively. The main aim is to describe the vibrational behavior of thin films in dependence on temperature and determine the changes connected with the glass transition of PS. Infrared reflection-absorption spectra were measured and from the plot of spectral region area (Arange) vs. temperature, glass transition temperature (Tg) of PS was extracted. The abrupt change in the course of A of Car-H stretching vs. temperature was assigned to the glass transition. Tg of PS and PS+B18H22 thin film was determined to be 74 °C and 77 °C, respectively. On the other hand, only a continuous decrease of A of C-H stretching vs. temperature was found for both samples indicating that each vibrational motion reacts uniquely on temperature increase. It was further found that anti-B18H22 is not fixed firmly in the thin layer at higher temperatures, because no B-H spectral response was detected above 91 °C. This result was also supported with TGA and DSC analysis showing a particular mass decrease at temperature 75 °C.

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Study on the Glass Transition Process of Polymer System Using Differential Scanning Calorimetry and Fourier Transform Infrared Spectroscopy

Cited by 14 publications

References 49 publications

Probing the Metal Oxide/Polymer Molecular Hybrid Interfaces with Nanoscale Resolution Using AFM-IR

Probing the Metal Oxide/Polymer Molecular Hybrid Interfaces with Nanoscale Resolution Using AFM-IR

On the Dynamic Mechanical Behavior and Importance of Weak Interactions in PS/PVME Blends

Polystyrene thin films with incorporated borane clusters for electronic applications investigated by infrared reflection-absorption spectroscopy

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