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Updated: Jun 19, 2026

Depolymerizable Olefinic Polymers Based on Fused-Ring Cyclooctene Monomers
Published on: December 16, 2022
Intermediate states in the melting process of low molecular weight poly(ethylene oxide)
H U Zhou1, Jiachun Feng, Peiyi Wu
1The Key Laboratory of Molecular Engineering of Polymers (Ministry of Education) and Department of Macromolecular Science and Advanced Materials Laboratory, Fudan University, Shanghai 200433, PR China.
Abstract:
The melting behavior of low molecular weight poly(ethylene oxide) (PEO) fractions has been studied via generalized two-dimensional infrared (2D-IR) correlation spectroscopy and a new stochastic-pulse-based temperature modulation differential scanning calorimetry (DSC) technique (TOPEM). 2D-IR correlation analysis of the melting of PEO shows that nu(s)(CH2) and gamma(a)(CH2) vary prior to nu(s)(COC). Moreover, the TOPEM experiments show that reversible melting and crystallization is occurring during the melting of PEO. These suggest that the melting of PEO is possibly a process passing over intermediate states. Based on our results, a model of the melting process of PEO lamellae is presented: the intermediate states containing the distorted helical conformation are formed first at the front of the lamellae during the melting process.
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