Synthesis and thermal properties of polystyrene-graft-PEG copolymers as new kinds of solid–solid phase change materials for thermal energy storage

Sarı, Ahmet; Alkan, Cemil; Biçer, Alper

doi:10.1016/j.matchemphys.2011.12.056

Cited by 138 publications

(81 citation statements)

References 28 publications

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“…Thus, synthesis of novel SSPCMs with high phase change enthalpy and low phase change temperature is a significant and pressing work. Recently, the preparation and application of polymeric SSPCMs has arose growing interests of considerable scientists [14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33], and many novel polymeric SSPCMs were obtained by chemical grafting, blocking and crosslinking copolymerization using the solid frameworks as a hard segment and SLPCMs as a soft segment.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, they are usually used as the phase change functional chains (soft segment) in the molecule of polymeric SSPCMs [17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33]. Jiang et al [17] reported a series of SSPCMs by grafting polymerization in which CDA acted as the main chain and PEG with different molecular weights acted as the grafting side chain.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and performances of novel solid–solid phase change materials with hexahydroxy compounds for thermal energy storage

et al. 2015

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synthesis and performances of novel solid–solid phase change materials with hexahydroxy compounds for thermal energy storage

et al. 2015

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“…The graft ratio of comb-like polymeric phase change materials also decreased with the increase of the length of the alkyl side chains. Ahmet Sari et al [15] synthesized a new kind of polymeric solid-solid phase change materials (SSPCMs) polystyrene-graft-PEG copolymers, in which polystyrene was used as a hard segment, and PEG6000 was used as a soft segment. By controlling the feed ratio of polystyrene and PEG6000 to 4:1, 2:1, and 1:1, the synthesized SSPCMs had typical solid-solid phase transition characteristics, with the phase transition temperatures in the range of 55-58 • C and the latent heat enthalpy in the range of 116-174 J/g.…”

Section: Introductionmentioning

confidence: 99%

Poly(mono/diethylene glycol n-tetradecyl ether vinyl ether)s with Various Molecular Weights as Phase Change Materials

2018

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At present, research on the relationship of comb-like polymer phase change material structures and their heat storage performance is scarce. Therefore, this relationship from both micro and macro perspectives will be studied in this paper. In order to achieve a high phase change enthalpy, ethylene glycol segments were introduced between the vinyl and the alkyl side chains. A series of poly(mono/diethylene glycol n-tetradecyl ether vinyl ethers) (PC 14 E n VEs) (n = 1, 2) with various molecular weights were polymerized by living cationic polymerization. The results of PC 14 E 1 VE and PC 14 E 2 VE showed that the minimum number of carbon atoms required for side-chain crystallization were 7.7 and 7.2, which were lower than that reported in the literature. The phase change enthalpy 89 J/g (for poly(mono ethylene glycol n-tetradecyl ether vinyl ethers)) and 86 J/g (for poly(hexadecyl acrylate)) were approximately equal. With the increase of molecular weight, the melting temperature, the melting enthalpy, and the initial thermal decomposition temperature of PC 14 E 1 VE changed from 27.0 to 28.0 • C, from 95 to 89 J/g, and from 264 to 287 • C, respectively. When the number average molar mass of PC 14 E n VEs exceeded 20,000, the enthalpy values remained basically unchanged. The introduction of the ethylene glycol chain was conducive to the crystallization of alkyl side chains.

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“…It has been found applications in numerous fields such as phase materials [12], tissue [13,14], and especially in textile [15] for their good water adsorption properties, good mechanical properties as well as inexpensive cost. For textile applications, the hydrophilic PEG segments are served as the role of adjusting the moisture adsorption [16].…”

Section: Introductionmentioning

confidence: 99%

Investigation of the state and distribution of water in poly(ethylene terephthalate)/polyethylene glycol copolymers with various molecular weight of polyethylene glycol

Jin

Ji³

et al. 2015

Polym Eng Sci

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Poly(ethylene terephthalate)/polyethylene glycol (PETG) copolymers with molecular weight of PEG varied from 800 to 20,000 g/mol were synthesized by melt macromolecular interesterification method. The results of contact angle and water adsorption capacity reveal that the molecular weight of PEG has a positive effect on the hydrophilic behavior of PETG copolymers. The interaction between water molecule and PETG copolymer was investigated through each relaxation time component by the Carr–Purcell–Meiboom–Gill sequence of low‐field nuclear magnetic resonance. The analysis of T2 component with different states shows that with the increase of molecular weight of PEG, the water adsorption capacity increases due to the microphase separation behavior of PETG copolymers. This result was also supported by the endothermic behavior of H2O/PETG mixtures measured by differential scanning calorimetry (DSC). Water molecule was tightly bound with PEG flexible chains at first stage, and then water molecules could swell the PETG copolymers, additional water permeating into the swelling copolymers. POLYM. ENG. SCI., 55:2195–2204, 2015. © 2015 Society of Plastics Engineers

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Synthesis and thermal properties of polystyrene-graft-PEG copolymers as new kinds of solid–solid phase change materials for thermal energy storage

Cited by 138 publications

References 28 publications

Synthesis and performances of novel solid–solid phase change materials with hexahydroxy compounds for thermal energy storage

Synthesis and performances of novel solid–solid phase change materials with hexahydroxy compounds for thermal energy storage

Poly(mono/diethylene glycol n-tetradecyl ether vinyl ether)s with Various Molecular Weights as Phase Change Materials

Investigation of the state and distribution of water in poly(ethylene terephthalate)/polyethylene glycol copolymers with various molecular weight of polyethylene glycol

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