Study on thermal stability of water-based polyurethanes derived from hydroxypropyl terminated poly(dimethylsiloxane)

Džunuzović, Jasna V.; Stefanović, Ivan S.; Džunuzović, Enis S.; Basagni, Andrea; Marega, Carla

doi:10.1007/s10965-024-03982-w

Cited by 1 publication

(2 citation statements)

References 55 publications

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“…As a result, the first and second DTG peaks of pure PU are better separated at a heating rate of 5 • C/min, while at 20 • C/min, they are completely overlapped. Thermal degradation rate of polymers can be written as [43][44][45]:…”

Section: Estimation Of the Apparent Activation Energy Of Thermal Degr...mentioning

confidence: 99%

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Fabrication of Polycaprolactone-Based Polyurethanes with Enhanced Thermal Stability

Džunuzović,

Stefanović,

Džunuzović

et al. 2024

Polymers

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The benefit of being acquainted with thermal properties, especially the thermal stability of polyurethanes (PU), and simplified methods for their improvement is manifold. Considering this, the effect of embedding different amounts of unmodified and surface-modified TiO2 nanoparticles (NPs) within PU, based on polycaprolactone (PCL) and Boltorn® aliphatic hyperbranched polyester, on PU properties was investigated. Results obtained via scanning electron microscopy, swelling measurements, mechanical tests and thermogravimetric analysis revealed that TiO2 NPs can be primarily applied to improve the thermal performance of PU. Through surface modification of TiO2 NPs with an amphiphilic gallic acid ester containing a C12 long alkyl chain (lauryl gallate), the impact on thermal stability of PU was greater due to the better dispersion of modified TiO2 NPs in the PU matrix compared to the unmodified ones. Also, the distinct shape of DTG peaks of the composite prepared using modified TiO2 NPs indicates that applied nano-filler is mostly embedded in soft segments of PU, leading to the delay in thermal degradation of PCL, simultaneously improving the overall thermal stability of PU. In order to further explore the thermal degradation process of the prepared composites and prove the dominant role of incorporated TiO2 NPs in the course of thermal stability of PU, various iso-conversional model-free methods were applied. The evaluated apparent activation energy of the thermal degradation reaction at different conversions clearly confirmed the positive impact of TiO2 NPs on the thermal stability and aging resistance of PU.

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Section: Estimation Of the Apparent Activation Energy Of Thermal Degr...mentioning

confidence: 99%

“…where α represents the degree of conversion, which can be calculated using TGA results, i.e., values of the mass of the sample before thermal degradation (w 0 ), mass at time t (w t ) and mass at the end of degradation (w f ) [45]:…”

Section: Estimation Of the Apparent Activation Energy Of Thermal Degr...mentioning

confidence: 99%

Fabrication of Polycaprolactone-Based Polyurethanes with Enhanced Thermal Stability

Džunuzović,

Stefanović,

Džunuzović

et al. 2024

Polymers

Self Cite

View full text Add to dashboard Cite

show abstract

Study on thermal stability of water-based polyurethanes derived from hydroxypropyl terminated poly(dimethylsiloxane)

Cited by 1 publication

References 55 publications

Fabrication of Polycaprolactone-Based Polyurethanes with Enhanced Thermal Stability

Fabrication of Polycaprolactone-Based Polyurethanes with Enhanced Thermal Stability

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