Fiber reinforced polymer composites: preparation, mechanical properties and thermal analysis

Nowadays, polymer matrix composites are broadly used, so their properties should be investigated in depth and under various conditions. Fiber-reinforced polymer (FRP) is a composite material which contains polymer as matrix and fibers as reinforcement phase. As it is broadly known, temperature exerts a high impact on materials’ properties and especially in the case of the FRP composites which have polymer matrix; due to their viscoelastic nature, polymers are relative sensitive to high temperatures. In this dissertation, FRP composites, with carbon, aramid, carbon/aramid hybrid, glass or basalt fibers as reinforcement phase were prepared through various fabrication methods. Their various mechanical properties, such as tensile and flexural strength were investigated whereas special attention was given in the thermal analysis of the FRP composites through Dynamic Mechanical Analysis (DMA), Thermomechanical Analysis (TMA), Thermogravimetric Analysis (TGA) experiments, and Differential Scanning Calorimetry (DSC). In particular, in the first experimental part of this dissertation, glass or carbon fiber-reinforced polymer composites were prepared, through vacuum bag oven method, by using prepreg materials. The used fibers were in woven form, with orientations at 0º (0º/90º) or at 45º (-45º/+45º), and in unidirectional form, longitudinal or transverse direction. In the experimental study, the optimal fibers’ type and orientation were investigated through DMA and the glass transition temperature (Tg) of the composites was determined. In the second experimental part of the dissertation, basalt fiber-reinforced polymer (BFRP) composites with epoxy matrix, 20 layers, and volume fraction of fibers Φf = 53.66%, were fabricated through a hand lay-up compression molding combined method. Their viscoelastic behavior in the temperature range 30-180 ºC and at 1, 5 or 10 Hz was explored by DMA whereas TMA took part in terms of creep recovery and stress-relaxation tests. Moreover, the Tg of the BFRP composites was determined through the peak of the loss modulus and tanδ curves while the decomposition of the BFRP composites and basalt fibers, in air or nitrogen atmosphere, was explored through TGA. Also, the mechanical behavior of the BFRP composites was investigated by tensile and three-point bending experiments.

ISBN:	978-80-7678-030-9
EAN:	9788076780309
Počet stran	38 stran
Datum vydání	01. 11. 2021
Pořadí vydání	První
Jazyk	anglický
Vazba	e-kniha - pdf
Nakladatelství	Univerzita Tomáše Bati ve Zlíně
Tématická skupina	999 - nezařazeno
	Neprodejná publikace. Publikaci je možné poptávat zde: Volně dostupné na http://hdl.handle.net/10563/49816