Structure and thermal performance of poly(styrene-co-maleic anhydride)-g-alkyl alcohol comb-like copolymeric phase change materials

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

“…The results were consistent with the previously reported literature [26,28]. For PC 14 E n VE, when n changed from 1 to 2, the number of crystallizable CH 2 groups N c were increased but the crystallinity of the polymers X c was decreased simultaneously. The introduction of a flexible ethylene glycol segment between the main chains and side chains can decrease the degree of the frustrated crystallization of side chains to a certain extent.…”

“…The phase change enthalpy of the homopolymer comb-like phase change materials PC 14 E n VEs were clearly affected by the number average molar mass, while the effect of the molecular weight on the phase change temperatures was not obvious. When the number average molar mass of PC 14 E n VEs exceeded 20,000, the enthalpy values were almost a constant at 89 and 83 J/g for PC 14 E 1 VE and PC 14 E 2 VE, respectively. The melting temperatures of PC 14 E 1 VE changed from 27.0 to 28.0 • C and the crystallization temperature changed from 17.3 to 17.5 • C as the number average molar mass increased.…”

“…When the side-chain length increased from 14 to 26, the substitution degree was changed from 67.3 to 32.6; the phase transition temperatures and the heat enthalpy were changed from 36.4 to 67.1 • C and from 125.7 to 146.2 J/g, respectively. Wang et al [14] prepared a series of shape-stabilized comb-like polymeric phase change materials (poly(styrene-co-maleic anhydride)-g-alkyl alcohol). When the side-chain length of poly(styrene-co-maleic anhydride)-g-alkyl alcohol increased from 14 to 26, the phase transition temperature and the heat enthalpy were changed from 34.7 to 73.7 • C and from 37.9 to 101.7 J/g, respectively.…”

Surface Modification of Nanoclays with Styrene-Maleic Anhydride Copolymers

“…FTIR spectra of the pristine HNT and modified HNT with SMA-1000 and SMA-EF40 (represented by HNT-1000 and HNT-EF40, respectively) are presented in Figure 2 can be attributed to the formation of ester bonding between anhydride and -OH groups [36] [37]. The ester bonding formation exhibits that SMA-1000 copolymer is more efficiently grafted to HNT surface than SMA-EF40 due to its higher maleic anhydride content and lower molecular weight.…”

Shape-stabilized phase change materials based on poly(ethylene-graft-maleic anhydride)-g-alkyl alcohol comb-like polymers

“…Thermal Contents lists available at ScienceDirect journal homepage: www.elsevier.com/locate/solmat energy storage and phase change temperature increased with the length and grafting ratio of fatty alcohol side chain, and phase transition temperatures ranging from 35.1 to 56.5°C and heat enthalpy between 52 and 63 J/g were found. A series of SMA-g-C n H 2n þ 1 OH CLPPCMs with poly(styrene-co-maleic anhydride) (SMA) as polymeric backbone and 1-alcohols (C n H 2n þ 1 OH, n ¼14, 16, 18 or 26) as energy units were also studied [52]. In recent study, N-alkylated polypyrrole comb-like polymers were successfully prepared and they exhibited a good crystallization and thermal energy storage capability [53].…”