Comparison of the physicochemical, rheological, and mechanical properties of core and surface of polypropylene composite (GF50‐PP) plate fabricated by thermocompression process

Abstract

The microstructural properties and rheological behavior of the long‐glass‐fiber‐reinforced polypropylene (GF50‐PP) composite produced by the compression molding process were studied and modeled. Composite plates of GF50‐PP with different thicknesses of 4, 12, and 24 mm have been used to study the effect of glass fiber distribution and various thicknesses on the properties of the core and the surface of the composites. Physicochemical characteristics and rheological behavior of the surface and the core of the plates have been compared. The effect of material sampling area on glass transition temperature, melting temperature, crystallization temperature, degree of crystallinity (Xc), and viscosity were analyzed. Mechanical tests have been carried out to assess the impact of the process parameters on the mechanical characteristics. The results showed that in the compression molding process, three competing parameters should be considered: the Xc, fiber accumulation, and presence of porosity. One can note that this study is applicable to present the relation or interaction between process, microstructure, and properties of the GF50‐PP composite prepared by the thermocompression method.

Molybdenum disulfide of modified in situ as a nanofiller for enhanced mechanical properties and thermal properties of polypropylene composites

“…The nonisothermal crystallization temperature ( T c ) and crystallinity ( X c ) are lowest in virgin PP and gradually increase with increasing graphene content of the composites. [ 39 ] This trend indicates that MoS 2 can function as heterogeneous nucleation sites for polymer microcrystals as the melt solidifies. The reduced nucleation‐activation energy accelerates the crystallization rate and reduces the spherical crystal size.…”

Analysis of the Segregation Phenomena of Wood Fiber Reinforced Plastics

“…Ramzy et al [16] and El-Sabbath [17] made similar findings using hemp and sisal fiber-reinforced polypropylene. The influence of the matrix material in combination with long glass fibers on the rheological and mechanical properties of surface and core areas has been studied, for example, in [18]. However, the research efforts did not address the influence of the matrix material used on the filling/flowing and segregation behavior.…”

Vibration Behavior of Thermoplastic Composite With Different Glass Fiber Contents Under Low-Temperature Conditions

“…Especially, to ensure the low emission goal and efficient use of natural resources due to the increasing environmental restrictions, without sacrificing any mechanical property, the importance of the utilization of polymer-based composite materials that are lighter than traditional alloys has been growing rapidly in the designed structures [1]. In this regard, thermoplastic-based composites with remarkable characteristics, such as being light and having good recyclability, low cost, high ductility, and adequate damping strength; are commonly employed in the aviation, automotive, marine, and petroleum industries [2], [3], [4], [5], [6].…”

“…Glass fiber as a reinforcement has a usage share of approximately 90% in the industry due to its notable qualities, which include being readily available in a variety of forms, inexpensively processable using various manufacturing techniques, and inert [9]. Considering the effect of glass fiber on improving the mechanical properties of the composite, its utilization as a reinforcement in polypropylene (PP), one of the thermoplastic-based matrixes now in use, is cost-effective and quite common [2], [3], [4], [5], [6], [8], [9], [10].…”