• thermoset polymer
  • A thermoset polymer matrix is a synthetic polymer reinforcement first developed for structural applications, such as glass-reinforced plastic radar domes on aircraft and graphite-epoxy payload bay doors on the space shuttle. (wikipedia.org)
  • Thermoset polymer matrix technologies also find use in a wide diversity of non-structural industrial applications. (wikipedia.org)
  • These properties are influenced by a 400-450 °F (204-232 °C) continuous use temperature and a glass transition of 500 °F (260 °C). This thermoset polymer type is merged into composites as a prepreg matrix used in electrical printed circuit boards, and for large scale structural aircraft - aerospace composite structures, etc. (wikipedia.org)
  • molecular weight
  • It is standard practice to add a low molecular weight UV "stabilizer" to light-sensitive polymers to absorb the light in the destructive range or to quench the energy generated as a result of the excitation of the light-absorbing functional groups in the polymer. (google.com)
  • Although low molecular weight UV absorbers or quenchers of various types are effective in inhibiting or retarding the destruction of the polymers to which they are added, their extractibility in various media and/or their volatility during the processing or fabrication of the polymers at elevated temperatures place a limitation on their utility. (google.com)
  • Thermoset plastic polymers characterised by rigid, three-dimensional structures and high molecular weight, stay out of shape when deformed and undergo permanent or plastic deformation under load, and normally decompose before melting. (wikipedia.org)
  • Resin
  • A novel hybrid network composed of benzoxazines (BZ) and novolac epoxy resin (F-51) was prepared successfully. (hindawi.com)
  • Recently, many authors have investigated the copolymerization of benzoxazine resin with epoxy resin to increase the cross-linking density and glass-transition temperature and through this have gained plentiful and substantial achievements [ 8 , 20 - 22 ]. (hindawi.com)
  • 23 ]. However, the curing kinetic of benzoxazine-novolac epoxy resin hybrid networks by isothermal differential scanning calorimetry is scarce. (hindawi.com)
  • The process of curing changes the resin into an infusible, insoluble polymer network, and is induced by the action of heat or suitable radiation often under high pressure, or by mixing with a catalyst. (wikipedia.org)
  • Curing a thermosetting resin transforms it into a plastic, or elastomer (rubber) by crosslinking or chain extension through the formation of covalent bonds between individual chains of the polymer. (wikipedia.org)
  • wherein
  • b) subjecting the polymerizable composition to conditions appropriate to polymerize the polymerizable composition, wherein the polymerizable composition comprises at least one benzoxazine compound, preferably selected from the group consisting of N-alkyl and N-alkenyl benzoxazine compounds. (patentsencyclopedia.com)
  • ethylene, the second metallocene catalyst is capable of incorporating a greater amount of ethylene into the propylene based polymer than the first metallocene catalyst and wherein the first metallocene catalyst is capable of forming a propylene/ethylene random copolymer exhibiting a melting temperature that is greater than that of a propylene/ethylene random copolymer formed from the second metallocene catalyst. (patentsencyclopedia.com)
  • condensation
  • Benzoxazines (BZ) can be prepared by the Mannich-like condensation of different types of phenol, formaldehyde, and an amine, by employing either solution or solventless methods, so the molecular structure of BZ offers enormous design flexibility. (hindawi.com)
  • Materials
  • THIENOCORONENE-IMIDE SEMICONDUCTING COMPOUNDS AND POLYMERS - Disclosed are new semiconductor materials prepared from thienocoronene-imide-based small molecule and/or polymeric compounds. (patentsencyclopedia.com)
  • present
  • Monomer reactivities are directly related to the number of oxazine functionalities present at the benzene ring yielding the lowest polymerization temperature for the trifunctional phloroglucinol-based benzoxazine. (mdpi.com)
  • Product
  • Thermosetting polymers may be contrasted with thermoplastic polymers, which are commonly produced in pellets, and shaped into their final product form by melting and pressing or injection molding. (wikipedia.org)