Synthesis and thermal properties of poly(styrene-co-acrylonitrile)-graft-polyethylene glycol copolymers as novel solid-solid phase change materials for thermal energy storage

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• 作者：Si-Yang Mu^a ; Jing Guo^a ; ^b ; ^{guojing8161@163.com" class="auth_mail" title="E-mail the corresponding author} ; Yu-Mei Gong^a ; ^b ; Sen Zhang^a ; ^b ; Yue Yu^a ; ^b
• 关键词：Phase change material ; Energy storage and conversion ; Thermal properties ; Polyethylene glycol
• 刊名：Chinese Chemical Letters
• 出版年：2015
• 出版时间：November 2015
• 年：2015
• 卷：26
• 期：11
• 页码：1364-1366
• 全文大小：751 K

文摘

A novel poly(styrene-co-acrylonitrile)-graft-polyethylene glycol (SAN-g-PEG) copolymer was synthesized as new solid–solid phase change materials (SSPCMs) by grafting PEG to the main chain of poly(styrene-co-acrylonitrile). The chemical structure of the SAN-g-PEG was confirmed by the Fourier transform infrared (FT-IR) and proton nuclear magnetic resonance (¹H NMR) spectroscopy techniques. The thermal energy storage properties and the storage durability of the SAN-g-PEG were investigated by differential scanning calorimetry (DSC). The SAN-g-PEG was endowed with the solid–solid phase transition temperatures within the range of 23–36 °C and the latent heat enthalpy ranged from 66.8 kJ/kg to 68.3 kJ/kg. Thermal cycling tests revealed that the SAN-g-PEG kept great heat storage durability after 1000 thermal cycles. The thermal stability was evaluated by a thermal gravity analysis (TGA), and the initial decomposition temperature (T_d) of SAN-g-PEG is 350 °C, which proves that the SAN-g-PEG possessed good thermal stability.