Heat Resistant Vinyl Ester Resins for Composite Applications
نویسنده
چکیده
Unsaturated polyester and epoxy vinyl ester resins have broad utility in composite applications. Today’s commercially available premium thermal performance vinyl ester resins are derived from novolac epoxies and methacrylic acid. These products combine low viscosity with shelf stable, yet fast curing properties, and enable fabricators to manufacture composite parts with rapid throughput for demanding environments. However, fabricators often look to competitive materials such as other specialty polymers, ceramics or metals when environmental temperatures exceed the serviceable range of today’s epoxy novolac vinyl esters. The highest performance vinyl esters achieve heat distortion temperatures (HDT) of ~165 °C, which precludes their use as a matrix resin in the most demanding high heat applications. Presented herein are a series of extremely high heat resistant vinyl ester resins which exceed the HDT’s of today’s commercially available highest performance vinyl esters. These new resins are tested for retention of mechanical properties at elevated temperature as well for corrosion resistance in a range of chemical environments.
منابع مشابه
Influence of temperature on styrene emission from a vinyl ester resin thermoset composite material.
Composite materials made with vinyl ester resins are lighter, stronger and corrosion resistant compared to most metals, and are increasingly being used as building materials and in public transportation. Styrene monomer is used as both a diluent and strengthener in the production of vinyl ester resin (VER) composites. Some researchers contend that free styrene in VER composites is available to ...
متن کاملResistance to Stress Corrosion Cracking of Unidirectional Glass/Polymer Composites Based on Low and High Seed ECR- glass Fibers for High Voltage Composite Insulator Applications
Stress corrosion experiments were performed on unidirectional ECR-glass/polymer composites with the modified polyester, epoxy and vinyl ester resins for the use in high voltage composite insulator applications. Two types of ECR-glass fibers with low and high seed counts were investigated. The stress corrosion tests were performed in nitric acid under four point bending conditions and the resist...
متن کاملA Novel Non-Halogenated Flame Retardant for Composite Materials
Flame retardants, such as inorganic fillers or halogenated resins, are incorporated into composites either as additives or reactive materials. In order to improve processability and mechanical properties, as well as reduce smoke toxicity, a method is being developed to introduce highly effective, inexpensive flame retardant materials into thermoset resins. Superabsorbent polymers (SAP) can be l...
متن کاملAn Evaluation of the Critical Conditions for the Initiation of Stress Corrosion Cracking in Unidirectional E-glass/Polymer Composites
The purpose of this work is to establish the critical surface conditions leading to the initiation of stress corrosion cracks on the as supplied surfaces of three unidirectional Eglass/polymer composites with modified polyester, epoxy and vinyl ester resins subjected to a nitric acid solution without mechanical loads. The composite materials considered in this study are commonly used in composi...
متن کامل