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Your search keyword '"Linear low-density polyethylene"' showing total 2 results
Start Over Descriptor "Linear low-density polyethylene" Language japanese
2 results on '"Linear low-density polyethylene"'

1. Relationship between Crystallinity of Linear Low-Density Polyethylene (LLDPE) and Resistivity-Temperature Properly of the LLDPE/Ni Composites.

Author

KONO, Akihiko, KAWADAI, Satoshi, YAMAMOTO, Masashi, and HORIBE, Hideo

Subjects
CRYSTALS, LOW density polyethylene, POLYMERS, COMPOSITE materials, NICKEL, MATRICES (Mathematics)
Abstract

We have investigated effects of the crystallinity (φc) of linear low-density polyethylene (LLDPE) and Ni content (CNi) on the electrical properties [the resistivity at room temperature (ρL) and positive temperature coefficient (PTC) effect of resistivity] of the LLDPE/Ni conductive polymer composites. The effect on ρL and PTC varied depending on φc and CNi even for samples with the same LLDPE (having the same melting-point). ρL decreased with increasing φc and/or CNi. Ni particles are localized in the amorphous matrix of LLDPE, and form the conductive paths. We concluded that many conductive paths are formed by increasing φc and/or CNi because the connection of Ni particles becomes tighter with increasing φc and/or CNi. The inflection-point temperature of the PTC curve (transition temperature of the PTC effect) of composites are 30 to 60°C lower than the melting-point of LLDPE when the φc of LLDPE is low. We clarified that the PTC effect appears from only a small cubical expansion of LLDPE even without melting of LLDPE. [ABSTRACT FROM AUTHOR]

Published
2010
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2. Thermal Degradation Behavior of Poly(Lactic Acid) in a Blend with Polyethylene

Author

Haruo Nishida, Masaki Omura, Takayuki Tsukegi, Yoshihito Shirai, and Takeshi Endo

Subjects
chemistry.chemical_classification, Materials science, Magnesium, General Chemical Engineering, chemistry.chemical_element, General Chemistry, Polymer, Polyethylene, Industrial and Manufacturing Engineering, Catalysis, Linear low-density polyethylene, chemistry.chemical_compound, Monomer, Chemical engineering, chemistry, Polymer chemistry, Degradation (geology), Polymer blend
Abstract

Poly(l-lactic acid) (PLLA) is a candidate for feedstock recycling materials, because it easily depolymerizes back into the cyclic monomer, l,l-lactide. To examine the recycling of PLLA from blends with other kinds of polymers, a polymer blend of PLLA and linear low-density polyethylene (LLDPE) was prepared and thermally degraded with a degradation catalyst: magnesium oxide (MgO) in a thermogravimeter/differential thermal analyzer (TG/DTA) and pyrolysis−gas chromatograph/mass spectrometer (Py−GC/MS). To clarify the influence of the LLDPE ingredient in the blend, the thermal degradation data were analyzed kinetically using two simulation methods: integration and random degradation analytical methods. From the results, it was found that PLLA was effectively depolymerized in the presence of MgO into l,l-lactide with a low racemization ratio and that LLDPE had no effect on the feedstock recycling of PLLA.

Published
2006

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