Unsaturated Polyester Resin Modified by Unsaturated POSS
|Course||Polymer Chemistry and Physics|
|Keywords||Unsaturated polyester Cage silsesquioxane Curing kinetics Composites Mechanical Properties|
Order to obtain the use of performance more excellent in the unsaturated polyester resin , different methods can be used on the unsaturated polyester resin modified, adding nano- materials in the synthesis process of the unsaturated polyester resin , is one of them . Synthesized methacryloyloxy propyl cage siloxane (MAP-POSS) and vinyl cage -half times the siloxane ( V - POSS) , and its structure was characterized , research unsaturated base cage silsesquioxane / curing kinetics of unsaturated polyester systems , thermal and electrical properties of laminated glass plate and mechanical properties . DSC study using dynamic methacryloyloxy propyl cage type silsesquioxane (MAP-POSS) / UPR nanohybrid of curing reaction of the composite system , the results show that the UPR, styrene and MAP-POSS than good compatibility and can be co-cured , MAP-POSS can be uniformly dispersed in the UPR the matrix formed in situ nano molecular composites . Curing kinetics parameters were determined to establish the mathematical model of the curing reaction kinetics . Thermal stability using thermal gravimetric analysis results indicate that The composite thermal decomposition in two steps, the first-order kinetics and obey . Cage -type silsesquioxane methyl acryloxypropyl (MAP-POSS) modified unsaturated polyester resins (UPR) were prepared as the base system , the composite material of the laminated glass plate , its mechanical properties and electrical properties the test results show that w (MAP-POSS) = 5% , the best mechanical properties , and have good dielectric properties . Using non-isothermal DSC method to study the relationship between the the UPR and of 5% V-POSS/UPR system curing reaction kinetics and the apparent activation energy and the conversion rate , determination of the mechanical and electrical properties of the FRP laminate . The results showed that the V-POSS, was added to the curing reaction Ea decreased with the increase of the degree of reaction , the process of curing reaction is described by using the model of the two parameters Sestak-Berggren (SB) , and the kinetic equation . When the V-POSS mass fraction of 5 % , the tensile strength of the FRP laminate improved 17.6kJ · m-2, the impact strength decreases with the V-POSS increased amount , but an increase in impact strength at 10% . Improve the electrical properties of the laminate with the increase in the amount of V-POSS joined , wherein ρv and ρs raise of 1-2 orders of magnitude .