Monoclinic Phase and Competition Between Transformation Modes in the Phase Transition Between Orthorhombic and Triclinic Phases of Crystalline Polyethylene

Strelnikov, I. A.; Zubova, E. A.

doi:10.1007/s13233-021-9101-9

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Changes In Polymer Characteristics With Cryomilling1

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2023

2024

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Cited by 2 publications

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“…93 The less stable monoclinic and triclinic phases have been observed in samples subjected to mechanical stress. [92][93][94][95] The presence of the new crystalline phase in the cryomilled PE samples suggests that the mechanical stress induced during the cryomilling process was sufficient to induce a phase transformation between the orthorhombic, mono-and tri-clinic phases.…”

Section: Changes In Polymer Characteristics With Cryomillingmentioning

confidence: 99%

Characterization of polymer properties and identification of additives in commercially available research plastics

Cuthbertson,

Lincoln,

Miscall

et al. 2024

Green Chem.

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Section: Changes In Polymer Characteristics With Cryomillingmentioning

confidence: 99%

Characterization of polymer properties and identification of additives in commercially available research plastics

Cuthbertson,

Lincoln,

Miscall

et al. 2024

Green Chem.

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“…It is known that the monoclinic phase can be formed either under the action of shear stresses or under plastic tensile deformation [ 14 , 15 , 16 , 21 ]. The amount of the monoclinic phase formed during particle compression should depend on the presence in the particles of certain morphological formations (fibrils, lamellas, shish-kebabs) and their orientation with respect to the compressive force.…”

Section: Resultsmentioning

confidence: 99%

Phase Transformation in UHMWPE Reactor Powders Synthesized on Various Catalysts in Mechanical and Thermal Fields

et al. 2023

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Nowadays, a solvent-free method for production of high performance fibers directly from ultrahigh-molecular-weight polyethylene (UHMWPE) reactor powder is being actively developed. It causes the interest in the morphology of the reactor particles and their behavior in thermal and mechanical fields. Changes in the phase composition in virgin particles of ultra-high molecular-weight polyethylene reactor powders and in particles of powders compressed at room temperature under different pressures were studied in real time using synchrotron radiation with heating in the range of 300–370 K. It was found that the content of the monoclinic phase in reactor powders depends on the type of catalyst used for synthesis and on the applied pressure. It is shown that there are monoclinic phases of different nature: a structurally stabilized monoclinic phase formed during synthesis, and a monoclinic phase resulting from plastic deformation during compaction at room temperature. The behavior of these phases in temperature and mechanical fields is compared.

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Monoclinic Phase and Competition Between Transformation Modes in the Phase Transition Between Orthorhombic and Triclinic Phases of Crystalline Polyethylene

Cited by 2 publications

References 13 publications

Characterization of polymer properties and identification of additives in commercially available research plastics

Characterization of polymer properties and identification of additives in commercially available research plastics

Phase Transformation in UHMWPE Reactor Powders Synthesized on Various Catalysts in Mechanical and Thermal Fields

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