Thermomechanical properties of radiation-modified blends of polyethylene with liquid crystalline copolyester

1999 ◽  
Vol 39 (8) ◽  
pp. 1375-1382 ◽  
Author(s):  
Valdis Kalkis ◽  
Robert D. Maksimov ◽  
Janis Zicans
Keyword(s):  
Liquid Crystalline ◽  
Thermomechanical Properties ◽  
Liquid Crystalline Copolyester

Thermomechanical properties of a magnetically and mechanically oriented liquid crystalline copolyester, xydar

1998 ◽  
Vol 38 (6) ◽  
pp. 914-921 ◽  
Author(s):  
Svetlana A. Kossikhina ◽  
Tsunehisa Kimura ◽  
Eiko Ito ◽  
Masanori Kawahara
Keyword(s):  
Liquid Crystalline ◽  
Thermomechanical Properties ◽  
Liquid Crystalline Copolyester

Thermomechanical Properties of Radiation-Modified Polyethylene/Ethylene-Propylene-Diene Copolymer/Liquid-Crystalline Copolyester Blends

1999 ◽  
Vol 64 (7) ◽  
pp. 1180-1192 ◽  
Author(s):  
Oleg Revjakin ◽  
Janis Zicans ◽  
Martins Kalnins ◽  
Valdis Kalkis ◽  
Robert D. Maksimov
Keyword(s):  
Liquid Crystalline ◽  
Crystalline Polymer ◽  
Thermomechanical Properties ◽  
Morphological Properties ◽  
Ethylene Propylene ◽  
Heating And Cooling ◽  
Thermomechanical Behaviour ◽  
Kinetics Of Formation ◽  
Liquid Crystalline Copolyester ◽  
Poly Ethylene

Radiation-modified blends of high-density polyethylene (PE) with ethylene-propylene-diene copolymer (EPDM; 10-65 wt.%) and thermotropic liquid-crystalline polymer (LCP; 10 wt.%) were investigated. The LCP was a liquid-crystalline copolyester of 40% poly(ethylene terephthalate) with 60% 4-hydroxybenzoic acid. The constituents were blended using a circular extruder, the specimens were prepared by compression molding and irradiated by 60Co γ-radiation up to 200 kGy. Mechanical, thermal, and morphological properties in wide temperature range were investigated for the irradiated and non-irradiated specimens. The effects of irradiation on the thermomechanical behaviour of the PE matrix are discussed. The LCP addition significantly affected the stress-strain behaviour of PE at temperatures above its melting point resulting in some anomalies in kinetics of formation of thermorelaxation stresses, which arise if the material is previously oriented. Thermosetting properties (thermorelaxation stresses and residual setting stresses under conditions of isometric heating and cooling) of the PE/EPDM/LCP blends crosslinked by irradiation and then oriented were also established. The results obtained suggest that such ternary blends improve the application properties of irradiated polyethylene and obtain useful thermosetting materials.

The influence of a magnetic field on the morphology and thermomechanical properties of a liquid crystalline epoxy carbon composite

2018 ◽  
Vol 39 (S4) ◽  
pp. E2573-E2583 ◽  
Author(s):  
Beata Mossety-Leszczak ◽  
Maciej Kisiel ◽  
Piotr Szałański ◽  
Magdalena Włodarska ◽  
Urszula Szeluga ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Liquid Crystalline ◽  
Carbon Composite ◽  
Thermomechanical Properties ◽  
Liquid Crystalline Epoxy
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