This article elaborates fiew types of epoxy resins that are applied frequently in mechanical engineering for creating a fiber-reinforced polymer composite with thermoset matrix. Hexahydrophthalic anhydride and methylhexahydrophthalic anhydrideĬRFP composite, modified by novolac resinĭGEBA, merk Araldite GY-250 with solvent of triglycidylether of trimethylolpropane (TGETMP)ĩ0 wt% isophorone diamines (Vestamin IPD) and 10 wt% trimethyl hexamethylene diamine (Vestamin TMD)Ĥ,5-Epoxy cyclohexane 1,2-dicarboxylate diglycidyl Mixing of diethylene-triamine and triethylenetetramineĭiglycidylester of hexahydrophthalic acid and 3,4 epoxycyclohexyl methyl-3,4 epoxy-cyclohexane carboxylate Tetraglycidyl diaminodiphenyl methane (TGDDM)ĭGEBA and diglycidylether of bisphenol F (DGEBF) The epoxy resins and curing agents commonly used in researches and productions Resin epoxyĬycloaliphatic diamine, bis p-amino cyclo-hexyl methane Table 1 presents the common types of epoxy resins and curing agents that are used for research and commercial. The existence of a large number of epoxy resins and curing agents requires that a material engineer must be careful in choosing the type of epoxy for sizing, prepreging, and molding purposes. įor producing fiber-reinforced polymer composites, especially carbon fiber reinforcement (CFRP), only certain types of epoxy resins can be properly applied as matrices for carbon fiber (CF). However, some high-performance and critical defense applications require the use of epoxy with higher functionality, tri or tetrafunctional epoxy, which is called multifunctional epoxies. For applications as matrices of composite materials, conventional difunctional epoxy is used. The aliphatic epoxy family comes from the monomer diglycidylether of bisphenol A (DGEBA), while the cycloaliphatic epoxy family (CAE) comes from the 3,4-epoxycyclohexyl-3,4-epoxycyclohexana carboxylate. The presence of aromatic rings on aliphatic epoxy improves the resistance of the epoxy to ultraviolet rays and usually is used for outdoor applications. There are two epoxy resins families, namely, (1) aromatic epoxy saturated ring and also called aliphatic and (2) nonaromatic saturated ring epoxy and also called cycloaliphatic. Epoxy is also widely used as a binder in paints to improve the resistance of painted materials from corrosion. Substitution of tools made from metal, wood, and other materials with epoxy resin has been proven to increase efficiency and save production costs and accelerate processes in the industries. Generally, concerning both the manufacturing characteristics and the performance of products, epoxy resins are widely applied as structural adhesives, surface coatings, engineering composites, and electrical insulation. In the marketplace, epoxy resins are available in the liquid form with low viscosity and powders (solids). They can be used in a wide temperature range with the selection of the right curing agent to adjust the level of cross-links. This Api is serving around 500 requests a minute and swallowed around 230MB of memory.Īfter moving to Workstation GC the api fell to around 85MB of memory, with no noticeable performance degrading or increased CPU usage on the machines.Epoxy resins are classified as thermoset polymers that have unique characteristics when manufacturing, such as low pressure required to make products, very small cure shrinkage, and low residual stresses. Testing WorkStation GC we took a simple Asp.Net Core Crud Api and moved from Server to Workstation GC. To tell it short, WorkStation GC is more aggressive than Server GC and therefore collects more often. Net - Here they explain that there are two different types of Garbage Collection in. Well, Microsoft themselves has a nice post about Garbage Collection in. Just spinning up a small service in Asp.Net Core requires up to 150MB of memory, so picture you're running a microservice setup containing just a couple of services will quickly require atleast 1GB of memory.Īs you might already be thinking, this will quickly add up, so how ca we fix this? Somewhere out there, you might be running a service or two, and depending on the environment and the programming language behind that service, it might require more or less memory just to stay alive, and running an Asp.Net Core service is no different. So, one of the things behind running microservices, or any service at all, is the constant use of memory. Enter fullscreen mode Exit fullscreen mode
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