Melting point of polymers under high pressure

Seeger, Andreas; Freitag, Detlef; Freidel, Frank; Luft, Gerhard

doi:10.1016/j.tca.2008.12.023

Cited by 12 publications

(2 citation statements)

References 30 publications

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“…[33] For LLDPE in the case of crystallization experienced compression molding, the temperature of 4-6 °C higher than the main melting peak is usually considered to be the melting of extended-chain crystalline structure. [33,34] If it is the case, it is not difficult to speculate that compression molding process causes the formation of extended-chain LLDPE layer in the presence of MWNTs, which is wrapped around of MWNTs shish. This result will be well confirmed by the SEM observation and the statistical diameter of MWNTs below.…”

Section: Calorimetric Analysismentioning

confidence: 99%

Low density polyethylene-multi-walled carbon nanotube nanocomposite membranes with enhanced conductivity for highly sensitive vapor sensing

Shi

Wang

Zhou

et al. 2023

Preprint

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A facile technique was reported for fabricating high conductivity and improved strength of linear low-density polyethylene/multi-walled carbon nanotubes (LLDPE /MWNTs) composite films by the ultrasonication anchoring technique and compression molding treatment. Thermal property, mechanical property, electrical conductivity, microstructures, optical property and organic vapor sensing behaviors of the MWNTs/LLDPE composite films were studied. The MWNTs are uniformly anchored onto the surface of LLDPE matrix and the conductive networks are easily formed by the ultrasonication anchoring technique. After compression molding treatment, the incorporation of MWNTs causes an easier formation of LLDPE extended-chain, which is wrapped around of MWNTs shish. The MWNTs/LLDPE composite films exhibit excellent conductivity of 2.79×105 Ω∙cm with 0.15 wt% MWNTs anchored. Meanwhile, the tensile strength of the composite films reaches 18.9 MPa. Interestingly, transparency is not significantly reduced. The sensitivity and reversibility to two typical solvents, i.e., acetone and xylene, during exposure-drying runs have been demonstrated. This work opens a new orientation to optimize the conductivity of MWNTs/LLDPE composite films with a wide range of prospect in the field of vapor sensor.

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Section: Calorimetric Analysismentioning

confidence: 99%

Low density polyethylene-multi-walled carbon nanotube nanocomposite membranes with enhanced conductivity for highly sensitive vapor sensing

Shi

Wang

Zhou

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…Seeger et al (33) demonstrate that the melting point of high density polyethylene decreases with increasing pressure provided that the pressure transmitting gas is in direct contact with the sample. The effect is explained by solubility of gases in the polymer and is found to increases in the row: He, N 2 , and C 2 H 4 .…”

Section: Thermodynamicsmentioning

confidence: 99%