2016
DOI: 10.1021/acs.macromol.6b01107
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Crystallization of Poly(ethylene oxide) with a Well-Defined Point Defect in the Middle of the Polymer Chain

Abstract: Poly­(ethylene oxide) (PEO) is a polymer of great interest due to its prevalence in biomedical, pharmaceutical, and ion conductive systems. In this study, the crystallization behaviors of a PEO with 22 monomer units (PEO22) and a PEO having the same degree of polymerization but with an additional 1,4-disubstituted 1,2,3-triazole ring in central position of the chain (PEO11-TR-PEO11) are investigated. PEO11-TR-PEO11 shows one type of lamella crystal after cooling to T = 0 °C, but structural changes during heati… Show more

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Cited by 40 publications
(64 citation statements)
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“…Monomethoxy‐terminated PEOs ( n = 11 and 22) and the dihydroxy‐terminated PEOs ( n = 22 and 44) were purchased from Sigma Life Science (St. Louis, MO), Fluka (Seelze, Germany), and TCI (Eschborn, Germany), respectively. The methoxy‐terminated PEOs had polydispersities between 1.01 ≤ Ð ≤ 1.05 calculated from MALDI‐ToF data, which is not significantly changed during end group modification. Azidotrimethylsilane (TMSN 3 , 94%) was purchased from Alfa Aesar (Haverhill, MA).…”
Section: Methodsmentioning
confidence: 96%
See 1 more Smart Citation
“…Monomethoxy‐terminated PEOs ( n = 11 and 22) and the dihydroxy‐terminated PEOs ( n = 22 and 44) were purchased from Sigma Life Science (St. Louis, MO), Fluka (Seelze, Germany), and TCI (Eschborn, Germany), respectively. The methoxy‐terminated PEOs had polydispersities between 1.01 ≤ Ð ≤ 1.05 calculated from MALDI‐ToF data, which is not significantly changed during end group modification. Azidotrimethylsilane (TMSN 3 , 94%) was purchased from Alfa Aesar (Haverhill, MA).…”
Section: Methodsmentioning
confidence: 96%
“…The SICs with TrLi end groups might also have the advantage to enhance the ion conductivity as this concept is based on our previous result that a 1,4‐disubstituted 1,2,3‐triazole (Tr) ring can enhance the Li + ‐ion conductivity of PEO when it is located at the central position of the polymer because it can increase the dissociation Li‐salts and additionally coordinate with Li + ‐ions which actively contributes to the transport of the Li + ‐ions . Thus, linear PEO‐based SICs with TrLi end groups were synthesized via catalyst‐free 1,3‐dipolar cycloaddition of alkyne‐modified PEOs (500 g mol −1 ≤ M n ≤ 2,000 g mol −1 ) with azidotrimethylsilane under pressure followed by lithiation (cf.…”
Section: Introductionmentioning
confidence: 99%
“…). During the reaction, 1,4‐disubstituted 1,2,3‐triazole rings are formed which connect the three‐arm star PEO and linear chains resulting in a PEO network. It should be noted that the presence of these triazole rings in the network might have a great influence on the ion conductivity since they can actively contribute to the transport of Li + ‐ions and increase the dissociation of the dissolved lithium salts .…”
Section: Introductionmentioning
confidence: 99%
“…In case of linear polymers, where long methylene sequences alternate with functional groups (“defects”) within the polymer backbone, their incorporation or exclusion into crystalline regions has been intensively studied . Especially precision polymers, resulting from acyclic diene metathesis (ADMET) polymerization or “click”‐based oligomerization chemistries, have been investigated in this context, often observing a layered arrangement of defects if the included moieties interact with each other via ionic‐forces or π–π‐stacking as observed for polymers bearing triazol‐rings, sulfonic, or amino acid groups in the main chain . Investigation of these inclusion‐ or separation effects has been accomplished using long chain alkanes and their derivatives as well as various periodic copolymers differing in branch identity and frequency.…”
Section: Introductionmentioning
confidence: 99%