Thermal and Phase Change Material Properties of Comb-Like Polyacrylic Acid-Grafted-Fatty Alcohols |
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Authors: | Emre Baştürk |
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Affiliation: | Department of Chemistry, Marmara University, Istanbul, Turkey |
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Abstract: | Poly(acrylic acid)-graft-fatty alcohol are synthesized from the esterification of polyacrylic acid with octadecanol and docosanol. The characterization of poly(acrylic acid)-graft-fatty alcohol was performed by attenuated total reflection–Fourier transform infrared spectroscopy. The thermal stability performances and phase change behaviors of poly(acrylic acid)-graft-fatty alcohol were examined by using thermogravimetric analysis system and differential scanning calorimetry. The results indicate that the poly(acrylic acid)-graft-fatty alcohol polymeric phase change materials possess good phase change properties and provide a suitable working temperature range. The heating process phase change enthalpy is measured between 112 and 122?J g?1, and the freezing process phase change enthalpy is found between 118 and 126?J g?1. The decomposition of poly(acrylic acid)-graft-fatty alcohol polymeric phase change materials started at 177°C and reached a maximum of 380°C. All of the obtained poly(acrylic acid)-graft-fatty alcohol polymeric phase change materials improved latent heat storage capacity in comparison with the pristine poly(acrylic acid) polymer. With the obtained results we conclude that, these materials promise a great potential in thermal energy storage applications. |
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Keywords: | Differential scanning calorimetry esterification functional polymers synthesis thermogravimetric analysis |
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