Specific features of molecular motion in lamellar polyethylene between 100 and 400 K

Bershteĭn, V. A.; Yegorov, V.M.; Marikhin, V. A.; Myasnikova, L. P.

doi:10.1016/0032-3950(85)90424-1

Cited by 12 publications

(1 citation statement)

References 16 publications

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“…Analyzing the data obtained by DSC, the dependences of temperature T am on the content of the nanofillers is plotted (see Figure 4 ) for unoriented samples (DR = 1). The temperature T am is determined according to the literature data [ 9 ] as the temperature at which molecular mobility occurs in the interlamellar places (i.e., when the melting of the crystallites themselves has not yet begun). The fact that T am decreases with an increase in the proportion of the nanoparticles in the unoriented fibers indicates an enhancing amorphization of the filled samples, that could then negatively affect the strength of the HDPE-based fibers with DR = 1.…”

Section: Resultsmentioning

confidence: 99%

Morphological Transformation in Polymer Composite Materials Filled with Carbon Nanoparticles: Part 2—Thermal and Mechanical Properties

et al. 2022

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HDPE-based composite fibers filled by original and annealed carbon nanodiscs (oND and aND, respectively) were prepared by melt extrusion technology with high-temperature orientational drawing up to draw ratio DR = 8. The thermal properties of the obtained fibers were investigated by DSC and TGA methods. It was shown that the nanofillers can be influenced by high temperatures, at which the molecular mobility in the interlamellar regions became active, while the melting point and the crystallinity degree of the samples were not affected. Short- and long-term mechanical properties of the nanocomposite fibers were studied as well. Very rare mechanical testing of the knotted fibers was carried out and, as a result, a decrease of the knot strength up to 35% was detected. It was also revealed that the carbon nanodiscs do not reinforce the composite fibers and play a negative role in the creep processes, while the Young’s modulus can be improved by 2 times for the oriented samples.

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Section: Resultsmentioning

confidence: 99%