Non-isothermal crystallization kinetics and degradation kinetics studies on barium thioglycolate end-capped poly(ε-caprolactone)

Mahalakshmi, S.; Alagesan, T.; Parthasarathy, V.; Tung, Kuo‐Lun; Anbarasan, R.

doi:10.1007/s10973-018-7514-2

Cited by 14 publications

(7 citation statements)

References 33 publications

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“…a–c. It is understood that T d increases linearly with the increasing heating rates . This is due to the fast scanning process.…”

Section: Resultssupporting

confidence: 90%

“…The Friedman model is a well‐known differential iso‐conversional method. It was modified with certain assumptions of other iso‐conversional expressions for differential applications.…”

Section: Methodsmentioning

confidence: 64%

“…The constant mass of about 8%–15% was left above 500°C even after the third step degradation process. It was found that the initial degradation temperature shifted toward the higher temperature while increasing the nano‐filler concentration in the PVA matrix . It was concluded that the thermal stability of the CuO doped PVA composite films increased when compared with pure PVA.…”

Section: Resultsmentioning

confidence: 97%

“…a–e, f–j, and k–o, respectively. All the plots exhibited a decreasing trend for all the five heating rates . The E a values determined were in the range of 41.3–65.2 kJ/mol for stage‐I, 160.4–187.5 kJ/mol for stage‐II, and 205.2–247.6 kJ/mol for stage‐III.…”

Section: Resultsmentioning

confidence: 99%

“…According to Kissinger model , the α reaches its’ maximum only at the degradation temperature ( T d ). It proposes the following equation:

\ln ((), \frac{β}{T_{d}^{2}}) = \ln ((), \frac{italicAR}{E}) - \frac{E}{{italicRT}_{d}}

…”

Section: Methodsmentioning

confidence: 99%

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Optical, thermal, mechanical properties, and non‐isothermal degradation kinetic studies on PVA/CuO nanocomposites

Selvi

Mahalakshmi²,

Parthasarathy

et al. 2019

Polymer Composites

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The CuO nanoparticle doped poly(vinyl alcohol) (PVA) nanocomposite films were prepared by the solution casting method. The structure of the prepared CuO nanoparticles and PVA nanocomposite films were confirmed by FTIR spectroscopy and XRD. The (101) crystal plane of PVA was observed at 19.8 in XRD. The size of the CuO nanoparticles was determined as 20 nm using Scherrer's formula. It was further confirmed with HRTEM. The surface morphology of the nanocomposite films was investigated using SEM. The optical properties of the prepared CuO nanoparticles and PVA nanocomposite films were analyzed by UV-Visible spectroscopy. The band gap of PVA was decreased after the incorporation of CuO in PVA. The thermal stability of the pure PVA and its nanocomposites was examined using TGA to assess their thermal degradation temperature at five different heating rates. The thermal stability of PVA nanocomposites was increased as compared with pure PVA. The non-isothermal degradation kinetic studies were also carried out to determine the energy of activation (E a ) for the degradation process using four different kinetic models. The tensile strength and Young's modulus of PVA nanocomposite films were notably increased with the increasing concentration of CuO nanoparticles. POLYM. COMPOS., 40:3737-3748, 2019. POLYMER COMPOSITES-2019 FIG. 4. HRTEM image of (a) CuO nanoparticles, (b) SAED pattern of CuO, and (c) HRTEM image of 6 wt% CuO loaded PVA nanocomposites system. [Color figure can be viewed at wileyonlinelibrary.com]

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“…a–c. It is understood that T d increases linearly with the increasing heating rates . This is due to the fast scanning process.…”

Section: Resultssupporting

confidence: 90%

Section: Methodsmentioning

confidence: 64%

Section: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 99%

“…According to Kissinger model , the α reaches its’ maximum only at the degradation temperature ( T d ). It proposes the following equation: