Crystalline structure in aliphatic polyketones

Lagarón, José M.; Vickers, M. E.; Powell, A. K.; Davidson, Neil S.

doi:10.1016/s0032-3861(99)00458-9

Cited by 41 publications

(39 citation statements)

References 10 publications

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“…Based upon the suggestion in [21] concerning two kinds of polyketone crystals, related to different degrees of imperfection, the existence of two fusion peaks on our heat capacity curve can be interpreted as melting of two different kinds of crystals. In the literature there are data about fusion enthalpy of completely crystalline β-phase of the alternating copolymer carbon monoxide-ethylene [3], equaling 7.79 kJ/mole.…”

Section: Resultsmentioning

confidence: 75%

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Calorimetric Study of Polyketone Formed from Carbon Monoxide, Ethylene and Butene-1

Afonin

Смирнова

Маркин

et al. 2016

Chem

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Section: Resultsmentioning

confidence: 75%

“…In studies [17][18][19][20][21][22] it has been shown that the structure, as well as mechanical and thermophysical properties of a copolymer, is influenced by the production method. In work [17] it has been found that the alternating copolymer of carbon monoxide and ethylene exists in α-modification.…”

Section: Resultsmentioning

confidence: 99%

Calorimetric Study of Polyketone Formed from Carbon Monoxide, Ethylene and Butene-1

Afonin

Смирнова

Маркин

et al. 2016

Chem

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“…In this work, we have exploited the emission features of BBS molecules for the preparation of cost‐effective plastic materials suitable for vapors detection. Semicrystalline aliphatic polyketone (PK) copolymer (perfectly alternating copolymer of ethylene and carbon monoxide) was selected as supporting matrix since it exhibits many desirable thermoplastic properties, such as a high tensile yield stress and an excellent impact performance . Moreover, its high degree of chemical resistance makes this polymer interesting for future scale‐up and engineered applications.…”

Section: Introductionmentioning

confidence: 99%

Vapochromic polyketone films based on aggregation‐induced enhanced emission

Iasilli

Scatto

Pucci

2018

Polymers for Advanced Techs

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Aliphatic polyketone (PK) films physically mixed with moderate amounts (0.6 wt%) of 4,4′‐bis(2‐benzoxazolyl)stilbene (BBS) fluorophores were demonstrated to be sensitive to volatile organic compounds. Notably, BBS/PK blends were prepared by means of a continuous 1‐step extrusion process in a pilot‐scale twin screw extruder and compression molded followed by rapid quenching in liquid nitrogen to get thin films (thickness of 150 μm) containing molecularly dispersed blue emissive BBS fluorophores. The 0.6 wt% BBS/PK films demonstrated significant vapochromism when exposed to volatile organic compounds characterized by favorable interactions with the polymer matrix such as chloroform. Solvent absorption caused PK matrix plasticization, thus increasing BBS mobility and triggering the self‐associations of molecules into bluish green‐emissive excimers/aggregates thanks to the emersion of the typical band at 500 nm. This phenomenon preferentially involves the BBS/PK film layers close to the air‐contact surface without affecting the bulk characteristics of the PK matrix. The easy modulation of the luminescent properties of PK films by varying the supramolecular organization of BBS dispersed molecules by chemical perturbations, and the use of melt‐processing procedures suggests the use for the first time of aliphatic PK in the development of smart materials for sensing applications.

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“…It is worth to note that β‐form contains strong intermolecular dipole–dipole bonds, and predominantly occurs in polyketone terpolymers. In particular, when the content of propylene exceeds 2.9 mol%, no more α‐form occurs …”

Section: Introductionmentioning

confidence: 99%

Comparing Crystallization Kinetics between Polyamide 6 and Polyketone via Chip‐Calorimeter Measurement

Luo

et al. 2017

Macro Chemistry & Physics

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Polyamide 6 and aliphatic polyketone exhibit similar melting points and heats of fusion, which expose the kinetic effects of intermolecular interactions on their crystallization kinetics. The commercial chip‐calorimeter Flash DSC1 is employed to measure their crystallization rates in a broad temperature range. The results show that polyamide crystallizes faster than polyketone at high temperatures, but slower at low temperatures. The faster crystallization is attributed to a lower lateral‐surface free energy for crystal nucleation at high temperatures on account of the sheet‐like hydrogen bonding in polyamide crystals. The slower crystallization is attributed to the lower molecular mobility for crystal nucleation at low temperatures on account of the higher glass transition temperature of polyamide.

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Crystalline structure in aliphatic polyketones

Cited by 41 publications

References 10 publications

Calorimetric Study of Polyketone Formed from Carbon Monoxide, Ethylene and Butene-1

Calorimetric Study of Polyketone Formed from Carbon Monoxide, Ethylene and Butene-1

Vapochromic polyketone films based on aggregation‐induced enhanced emission

Comparing Crystallization Kinetics between Polyamide 6 and Polyketone via Chip‐Calorimeter Measurement

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