title: Novel poly(tetramethylene ether)glycol and poly(ε-caprolactone) based dynamic network via quadruple hydrogen bonding with triple-shape effect and self-healing capacity.
abstract: A novel dynamic network was successfully prepared via self-complementary quadruple hydrogen bonding through Upy-telechelic poly(tetremethylene ether) glycol (PTMEG) and four-arm star-shaped poly(ε-caprolactone) ((4)PCL) precursors. The structure and the dynamic feature were identified by FT-IR and (1)H NMR. The differential scanning calorimetry (DSC) analysis indicated that the crystalline PCL and PTMEG segments show a separated melting peak, and the aggregation of Upy dimer was also observed. The dynamic mechanical analyzer (DMA) test reveals that the storage modulus of the network drops evidently across the thermal transition. These characteristics of the network ensure that it exhibits a triple-shape effect, and the composition of the network influences the performance of shape memory effect. The variation of the fixing ratio of the network in each deformation step is quite according to the crystallinity of the dominant segment. The reversibility of the quadruple hydrogen bonding between Upy dimer endues the network with self-healing capacity, and the damage and healing test of the network revealed that increasing the content of the PTMEG segment will be of benefit to self-healing performance.
authors.affiliation: Center for Degradable and Flame-Retardant Polymeric Materials (ERCEPM-MoE), National Engineering Laboratory of Eco-Friendly Polymeric Materials (Sichuan), State Key Laboratory of Polymer Materials Engineering, Sichuan University , Chengdu, Sichuan 610064, China.
authors.forename: Min
authors.initials: M
authors.lastname: Wei
authors.forename: Miqin
authors.initials: M
authors.lastname: Zhan
authors.forename: Dongqin
authors.initials: D
authors.lastname: Yu
authors.forename: Hui
authors.initials: H
authors.lastname: Xie
authors.forename: Manjie
authors.initials: M
authors.lastname: He
authors.forename: Keke
authors.initials: K
authors.lastname: Yang
authors.forename: Yuzhong
authors.initials: Y
authors.lastname: Wang
mesh_terms: D002152:Calorimetry, Differential Scanning; D006018:Glycols / Q000737:chemistry*; D006860:Hydrogen Bonding; D015394:Molecular Structure; D011091:Polyesters / Q000737:chemistry*; D058105:Polymerization; D017550:Spectroscopy, Fourier Transform Infrared
chemical_list: D006018:Glycols; D011091:Polyesters; C016240:polycaprolactone; C047554:polytetramethylene glycol
keywords: dynamic network; quadruple hydrogen bonding; self-healing; triple-shape effect