Longer-scale segmental dynamics of amorphous poly(ethylene oxide)/poly(vinyl acetate) blends in the softening dispersion

Wu, Xue-Bing; Wang, Huaguang; Liu, Changsong; Zhang, Zhengang

doi:10.1039/c0sm00633e

Cited by 35 publications

(49 citation statements)

References 75 publications

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“…1 is that the tand of PBA-co-IP and PEA-co-IP exhibited an asymmetric double-peak structure with a shoulder at higher temperature side and a maximum at lower temperature side. For quantitative discussion, the tand peak was resolved into two peaks by using a nonlinear fitting method [18,19,25]. Although there is no theoretical basis for this practice, it supplies the best fitting to the experimental data indeed.…”

Section: Resultsmentioning

confidence: 99%

“…Thus, if that, the tand peak of PBA-co-IP and PEA-co-IP would shift to lower Hz. The upper insert shows that the loss tangent peak is resolved into two peaks using a nonlinear fitting method [18,19,25]. The first peak refers to the main peak, as shown by the dash-dot line.…”

Section: Resultsmentioning

confidence: 99%

“…The polybutadienes with little varied microstructure still have larger different in coupling effect [17]. In fact, the relationship between structure of main chains and micro-dynamics still have many unsolved problems, especially in some polymers with strong coupling effect [18,19].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Why tanδ of poly (butyl acrylate) and poly (ethyl acrylate) with little double bonds are becoming asymmetric?

Zhang

2014

Polymer

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Why tanδ of poly (butyl acrylate) and poly (ethyl acrylate) with little double bonds are becoming asymmetric?

Zhang

2014

Polymer

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“…Generally, the mobility of chain segments in polymers is reflected in its T g [32,33] i.e a lower mobility resulted from a higher T g . This could be ascribed to the interaction between the PVC chain segments and the BT [32][33][34].…”

Section: -3 the Fourier Transform Infrared Spectroscopymentioning

confidence: 99%

X-Ray Diffraction and Differential Scanning Calorimetry of BaTiO3/ Polyvinyl Chloride Nanocomposites

Zayat

Shobak

Abdel‐Baset

et al. 2015

Int J of Adv in Sci Res

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Aiming to improve the inferior properties of polyvinyl chloride polymer, (BaTiO 3 ) x (PVC) 100-x composite samples were prepared and investigated. The structural changes of the composite (BaTiO 3 ) x (PVC) 100-x were studied as a function of BT content using FTIR, XRD and DSC measurements. Attention is paid to the tetragonality changes during composition changes.It was found that the hindrance to the PVC crystallization becomes less and less serious with the increase of BT ratio in the composite. This behavior could be attributed to the interaction between Ba +2 ions and Chlorine in the polymer. The FTIR spectra indicate a clear interaction between PVC and BaTiO 3 particles as is concluded from XRD results.The Scherrer formula was used to estimate the grain size for the included BT in the (BT) x (PVC) 100-x composite samples. The composite samples show abnormally small tetragonality for its BT content less than unity (с/a < 1). It seems that in (BaTiO 3 ) x (PVC) 100-x composite samples, the stress that stabilized the tetragonal phase of the core regions of BT decreased, leading to lower tetragonality (c/a ratio). It seems that T g of the composite samples increases with the increase of its BT content. Also DSC results reveal the increase of crystallization with the increase of BT content in the composite.

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“…Recently, a series of polymers such as polystyrene (PS), poly(methyl methacrylate) (PMMA), poly(vinyl acetate) (PVAc) have been measured by mechanical spectroscopy in torsion mode at a frequency range 10 -2 -10 2 Hz with a constant heating rate or at a given temperature versus frequency (isotherms) [9][10][11][12][13]. Fig.…”

Section: Polymersmentioning

confidence: 99%

Mechanical Spectroscopy: Some Applications On Structural Changes And Relaxation Dynamics In Soft Matter

Wu¹,

Liu²

2015

Archives of Metallurgy and Materials

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MechanIcal spectroscopy: soMe applIcatIons on structural changes and relaxatIon dynaMIcs In soft Matter spektroskopIa MechanIczna: nIektóre zastosowanIa do zMIan strukturalnych I dynaMIkI relaksacji w materii miękkiejThe general trend in soft matter is to study systems of increasing complexity covering a wide range in time and frequency. Mechanical spectroscopy is a powerful tool for understanding the structure and relaxation dynamics of these materials over a large temperature range and frequency scale. In this work, we collect a few recent applications using low-frequency mechanical spectroscopy for elucidating the structural changes and relaxation dynamics in soft matter, largely based on the author's group. We illustrate the potential of mechanical spectroscopy with three kinds of soft materials: colloids, polymers and granular systems. Examples include structural changes in colloids, segmental relaxations in amorphous polymers, and resonant dissipation of grain chains in three-dimensional media. The present work shows that mechanical spectroscopy has been applied as a necessary and complementary tool to study the dynamics of such complex systems.Keywords: Polymer segmental dynamics, colloids, granular matter, mechanical spectroscopyOgólnym trendem w miękkiej materii jest, aby badać układy o rosnącej złożoności, obejmującej szeroki zakres czasu i częstotliwości. Spektroskopia mechaniczna jest potężnym narzędziem dla zrozumienia struktury i dynamiki relaksacji tych materiałów w szerokim zakresie temperatury i skali częstotliwości. W niniejszej pracy, zebraliśmy kilka ostatnich zastosowań spektroskopii mechanicznej niskiej częstotliwości do poznania zmian strukturalnych i dynamiki relaksacji w miękkiej materii, w dużej mierze opartych na grupie autorów. Opisujemy potencjał spektroskopii mechanicznej w przypadku trzech rodzajów materiałów miękkich: koloidów, polimerów i układów ziarnistych. Przykłady obejmują zmiany strukturalne w koloidach, segmentowe relaksacje amorficznych polimerów, i rezonansowe rozpraszanie łańcuchów ziaren w mediach trójwymiarowych. Niniejsza praca pokazuje, że spektroskopię mechaniczną zastosowano jako niezbędne i uzupełniające narzędzie do badania dynamiki takich systemów złożonych.

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Longer-scale segmental dynamics of amorphous poly(ethylene oxide)/poly(vinyl acetate) blends in the softening dispersion

Cited by 35 publications

References 75 publications

Why tanδ of poly (butyl acrylate) and poly (ethyl acrylate) with little double bonds are becoming asymmetric?

Why tanδ of poly (butyl acrylate) and poly (ethyl acrylate) with little double bonds are becoming asymmetric?

X-Ray Diffraction and Differential Scanning Calorimetry of BaTiO3/ Polyvinyl Chloride Nanocomposites

Mechanical Spectroscopy: Some Applications On Structural Changes And Relaxation Dynamics In Soft Matter

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