The High-Temp Resistant Carbon Fiber Reinforced Plastic Continuous Sucker Rod Produced By Pultrusion Process

In this paper, the high-temp-resistant carbon fiber reinforced plastic continuous sucker rod, used in condition of 120℃, have been manufactured from carbon fiber reinforced vinyl ester resin composite materials by blending different types of vinyl ester resins or adding toluene diisocyanate (TDI) into novolac vinyl ester (NVE) resin and adding nano-SiO2 into high cross-linking vinyl ester resin. The static and thermal mechanical properties of the resulting composites have been measured. Differential scanning calorimeter (DSC) has been used to analyze the exothermic rules of a single or the mixed resins. In addition, the mechanical properties of the composites with different sized carbon fiber as reinforcement have been coMPared. The curing kinetics of a blended resin consisting of a novolac vinyl ester (VE) and a highly cross-linked VE has been studied by using different scanning calorimetry (DSC). It was found from the experimental results that pultrusion stability had been achieved by blending the resin with a sharp exothermic peak and the resin having a flat exothermic peak.The blended-resin-matrix composites reinforced with carbon fibers (CFRP) have been manufactured by pultrusion process. The flexural properties, inter-laminar shear strength (ILSS), dynamic thermal mechanical properties and thermo-gravimetric analysis (TGA) thermogram of the composites were studied. Results showed that the mechanical properties, including ILSS, flexural strengths and flexural moduli of the composites were improved coMPared to the pure-highly cross-linked-VE-matrix composites, meanwhile, their rubbery plateau moduli and thermal stability were increased coMPared to pure-novolac-VE-matrix composites. So the method of blending different resins is an effective way to improve the comprehensive properties of composites.For TDI modifying NVE resin composites, fewer TDI resulted the mechanical properties of composites, but with increasing the total content of TDI(15%), the thermal stability increased (arrived at 193℃), the effect of bending stability was negligible (coMPare with NVE resin composites), and a higher ILSS could be achieved. The comprehensive mechanical properties and heat-resistance of the composites with novolac vinyl ester resin as matrix can be improved by incorporating TDI into the matrix. The comprehensive mechanical properties and heat-resistance of the composites with HCLVE resin as matrix can be improved by incorporating nano-SiO2 into the matrix.CoMPared to the composites reinforced with epoxy-coated carbon fibers, the composites using vinyl ester resin coated carbon fibers as reinforcement had a higher interlaminar shear strength (ILSS), with an indicator of better adhesion between the fibers and matrix. It is not supported to treat the 50K CF by high temperature, which will lead the performance of the composites declined.When used the NVE resin to pilot-scale plant, its pultrusion stability had been verified. The heat deforming temperature of CF/NVE is 132.6℃, meeting the require of the high-temp-resistant carbon fiber reinforced plastic continuous sucker rod, used in condition of 120℃.