THERMO-MECHANICAL PROPERTY EVOLUTION OF A UNIDIRECTIONAL PULTRUDED CARBON FIBER REINFORCED POLYURETHANE PLATES SUBJECTED TO IMMERSION

Abstract

Abstract: In the present paper, the effects of immersion in distilled water, strong alkaline solution and artificial seawater at 20 ℃, 40 ℃ and 60 ℃ on the thermo-mechanical properties of a unidirectional pultruded carbon fiber reinforced polyurethane plates were studied. As found, after one year of immersion, the in-plane shear strength and the glass transition temperatures of the plates decreased by less than 15%, while the tensile strength was only reduced by 5%. Meanwhile, the plates were insensitive to the immersion media and temperatures. FTIR (Fourier Transform Infrared Spectroscopy) analysis indicated that postcuring of the resin matrix occurred, and the degradation of the thermo-mechanical properties was mainly attributed to the plasticization of the resin. Finally, the durability performances of the polyurethane matrix plates was compared to the epoxy resin based carbon fiber plates.

Key words: polyurethane, carbon fiber, pultruded plates, immersion, thermo-mechanical properties

CLC Number:

TB332

ZHANG Lei, HONG Bin, LI Jing, HUANG Sheng-de. THERMO-MECHANICAL PROPERTY EVOLUTION OF A UNIDIRECTIONAL PULTRUDED CARBON FIBER REINFORCED POLYURETHANE PLATES SUBJECTED TO IMMERSION[J]. Fiber Reinforced Plastics/Composites, 2018, 0(10): 96-101.

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