Self-decelerated crystallization in blends of polyhydroxyether of bisphenol A and poly(ethylene oxide) upon isothermal crystallization

Zheng, Sixun; Jungnickel, B.‐J.

doi:10.1002/(sici)1099-0488(20000501)38:9<1250::aid-polb16>3.0.co;2-m

Cited by 26 publications

(6 citation statements)

References 31 publications

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“…5b ). In this condition, T g turns out to be an important factor that not only gauges the initial step of phase separation induced by crystallization but also results in the deceleration of the crystallization caused by the vitrification due to the composition dependent T g 56 . This self-deceleration crystallization with non-linear growth rate deviates from the Avrami behavior since the crystallization rate ( ν c ) is not a constant.…”

Section: Resultsmentioning

confidence: 99%

The coupling and competition of crystallization and phase separation, correlating thermodynamics and kinetics in OPV morphology and performances

et al. 2021

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The active layer morphology transition of organic photovoltaics under non-equilibrium conditions are of vital importance in determining the device power conversion efficiency and stability; however, a general and unified picture on this issue has not been well addressed. Using combined in situ and ex situ morphology characterizations, morphological parameters relating to kinetics and thermodynamics of morphology evolution are extracted and studied in model systems under thermal annealing. The coupling and competition of crystallization and demixing are found to be critical in morphology evolution, phase purification and interfacial orientation. A unified model summarizing different phase diagrams and all possible kinetic routes is proposed. The current observations address the fundamental issues underlying the formation of the complex multi-length scale morphology in bulk heterojunction blends and provide useful morphology optimization guidelines for processing devices with higher efficiency and stability.

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Section: Resultsmentioning

confidence: 99%

The coupling and competition of crystallization and phase separation, correlating thermodynamics and kinetics in OPV morphology and performances

et al. 2021

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“…It is interesting to note that the k value obtained for PHETE/PEO blends is quite lower than those (ca. 0.5) obtained for the blends of poly(hydroxyether of bisphenol A) (PH) with PEO [24][25][26], suggesting that the interchain specific interactions were significantly weakened with the inclusion of terephthalic diester moiety into PH macromolecular backbone. This observation could be ascribed to the decease in hydroxyl fraction in PHETE in comparison with PH.…”

Section: Miscibilitymentioning

confidence: 99%

Poly(hydroxyether terephthalate ester): Synthesis, characterization and competitive specific interactions in mixtures with poly(ethylene oxide)

Liu

Zheng

2005

Polymer

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“…With the formation of rich PEG spherulites, the non-crystallizable component, EPN, was enriched in the amorphous region, and the mobility of EPN was restricted. Eventually, T g values of these samples increased [25][26][27][28][29].…”

Section: Uncured Samplesmentioning

confidence: 99%

Miscibility, crystallization behavior and specific intermolecular interactions in thermosetting polymer blends of novolac epoxy resin and polyethylene glycol

Chen

Shen

et al. 2008

Polymer Engineering & Sci

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Thermosetting polymer blends of novolac epoxy resin (EPN) and polyethylene glycol (PEG) were studied. The miscibility and crystallization behavior of the blends before curing reaction were investigated by polarized optical microscopy and differential scanning calorimetry (DSC). Overall uncured blend compositions were homogeneous in amorphous state. Single compositiondependent glass-transition temperature (T g ) for each blend could be observed, and the experimental T g 's of blends with EPN content ≥40 wt% could be explained well by the Gordon-Taylor equation. Thermal properties of blends cured with 4,4 0 -diaminodiphenylmethane were also determined by DSC. The capability of PEG to crystallize in cured blends was different from that in uncured ones because of the topological effect of highly crosslinking structure. On the basis of Fourier transform infrared spectroscopy results, it was judged that there were intermolecular hydrogen-bonding interactions between EPN and PEG in both cured and uncured blends.

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Self-decelerated crystallization in blends of polyhydroxyether of bisphenol A and poly(ethylene oxide) upon isothermal crystallization

Cited by 26 publications

References 31 publications

The coupling and competition of crystallization and phase separation, correlating thermodynamics and kinetics in OPV morphology and performances

The coupling and competition of crystallization and phase separation, correlating thermodynamics and kinetics in OPV morphology and performances

Poly(hydroxyether terephthalate ester): Synthesis, characterization and competitive specific interactions in mixtures with poly(ethylene oxide)

Miscibility, crystallization behavior and specific intermolecular interactions in thermosetting polymer blends of novolac epoxy resin and polyethylene glycol

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