Thermomechanical and adhesive properties of radiation-modified polymer composites for thermosetting products |
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| Authors: | V Kalkis R D Maksimov M Kalnins J Zicans T Bocoka O Revjakin |
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| Institution: | (1) Chemical Department, Latvian University, LV-1013 Riga, Latvia;(2) Institute of Polymer Mechanics, Latvian University, LV-1006 Riga, Latvia;(3) Institute of Polymer Materials, Riga Technical University, LV-1048 Riga, Latvia |
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| Abstract: | Gamma-irradiated blends of polyethylene (PE) with ethylene-propylene-diene copolymer (EPDM) and a thermotropic liquid-crystalline
polymer (LCP) are investigated at absorbed radiation doses not exceeding 150 kGy (10 kGy=1 Mrad). The temperature dependences
of elastic moduli, tension diagrams at a temperature above the melting point of the crystalline phase of PE, and long-term
strain recovery curves for oriented test specimens are presented. The kinetics of thermal relaxation and shrinkage stresses
in previously oriented composite specimens upon their heating and cooling is investigated. Data on the influence of LCP additions
on the adhesive interaction of the compositions with steel are obtained. The peculiarities of thermomechanical and adhesion
properties of these composites are discussed taking into account the morphologic and calorimetric data obtained.
Translated from Mekhanika Kompozitnykh Materialov, Vol. 36, No. 3, pp. 379–394, May–June, 2000. |
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| Keywords: | polyethylene ethylene-propylene-diene copolymer liquid-crystalline polymer gamma-irradiation thermomechanical behavior adhesion |
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